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Schweitzer Engineering Laboratories SEL-321, Instruction Manual

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Schweitzer Engineering Laboratories SEL-321 Instruction Manual Download Page 318

7-48 

Maintenance and Testing 

Date Code 20011026 

 

SEL-321/321-1 Instruction Manual 

The 50G overcurrent elements operate based upon the magnitude of the residual 
current.  Using the current connections shown in Figure 7.6, the magnitude of I

R

 is 

equal to the magnitude of the applied test current. 

With a 50G2 setting of 0.60 amps, 50G2 picks up when I

TEST

 is greater than 0.60 

amps. 

The 50QF negative-sequence overcurrent element operates based upon the 
magnitude of 3I

2

 applied.  Using the current connections shown in Figure 7.6, 

calculate the magnitude of 3I

2

 applied based upon the magnitude of I

TEST

. 

(

)

(

)

TEST

2

C

B

TEST

A

C

B

2

A

2

C

B

2

A

3

1

2

I

I

3

:

so

,

0

I

I

and

I

I

I

a

I

a

I

I

3

I

a

I

a

I

I

=

⋅

=

=

=

⋅

+

⋅

+

=

⋅

⋅

+

⋅

+

⋅

=

 

With a 50QF setting of 0.5 amps, 50QF picks up when I

TEST

 is greater than 0.5 amps. 

We calculated 

│

I

A

│

 = 

│

I

TEST

│

 = 2.49 amps which satisfies the supervisory 

overcurrent conditions described above. 

Select 

.

volts

120

67

V

and

volts

120

67

V

C

B

°

∠

=

°

−

∠

=

 

The ground distance elements are supervised by the negative-sequence directional 
element.  Check the negative-sequence quantities applied and verify that the 32QF 
element should assert.  Calculate the magnitude and angle of negative-sequence 
voltage and current applied for the test quantities listed above.  Then calculate the 
negative-sequence impedance, Z2c, applied using Equation 7.2. 

(

)

(

)

C

B

2

A

3

1

2

C

B

2

A

3

1

2

I

a

I

a

I

I

V

a

V

a

V

V

⋅

+

⋅

+

⋅

=

⋅

+

⋅

+

⋅

=

 

(

)

[

]

2

2

2

2

I

*

I

ANG

1

Z

1

V

Re

2

Z

⋅

°

∠

⋅

=

 Equation 

7.2 

2

2

I

V

m

2

Z

=

 

m

2

Z

25

.

0

F

2

Z

25

.

1

FT

2

Z

⋅

−

⋅

=

 Equation 

7.4 

Taking the test signals from Table 7.5. 

°

∠

=

°

−

∠

=

°

∠

=

120

V

0

.

67

V

120

V

0

.

67

V

0

V

4

.

40

V

C

B

A

 

(

)

volts

180

0

.

9

V

volts

120

0

.

67

120

1

120

0

.

67

240

1

0

4

.

40

V

2

3

1

2

°

∠

=

°

∠

⋅

°

∠

+

°

−

∠

⋅

°

∠

+

°

∠

⋅

=

 

Summary of Contents for SEL-321

Page 1: ...1 1 PHASE AND GROUND DISTANCE RELAY DIRECTIONAL OVERCURRENT RELAY FAULT LOCATOR INSTRUCTION MANUAL SCHWEITZER ENGINEERING LABORATORIES 2350 NE HOPKINS COURT PULLMAN WA USA 99163 5603 TEL 509 332 1890 FAX 509 332 7990 ...

Page 2: ...st inférieure au niveau de court circuit assuré par la protection WARNING Use only serial communications cables manufactured by SEL or built to SEL specifications with the SEL 321 Relay Damage to the relay or your communication equipment may result from the use of incorrect communication connections AVERTISSEMENT N utiliser que des câbles de communication série produits par SEL ou conformes à ses ...

Page 3: ...uencies of 50 Hz and 60 Hz Except when specific differences are noted all specifications and data apply equally to all versions of the relay SEL 321 RELAY VS SEL 321 1 RELAY Throughout this manual where there are differences between the SEL 321 Relay and the SEL 321 1 Relay the headings of those sections that apply strictly to the SEL 321 1 Relay include the following statement SEL 321 1 Relay Onl...

Page 4: ......

Page 5: ...ary of Revisions The Manual Change Information section has been created to begin a record of revisions to this manual All changes will be recorded in this Summary of Revisions table 20011203 Appendix A Fix for TCM logic bug 20011026 Reissued entire manual to reflect the following changes Section 2 Settings 59QL and 59PL are no longer hidden when ELOP N1 Y1 or Y2 Corrected Figure 2 31 Permissive Ov...

Page 6: ...ions Updated Appendix A Firmware Versions New k0 range LOP logic and IEC 1000 4 5 compliance for SEL 321 1 991102 Updated Figure 2 4 and deleted Burn In information in Section 2 Specifications 991022 Updated Section 3 Communications and 321 1 Command Summary to reflect correct page layout and MIRRORED BITS format Reissued page 6 2 in Section 6 Installation due to typographical error no date code c...

Page 7: ...Panel Drawings One I O Board Plug In Connector Version 16 high current interrupting outputs with shared return terminals in Section 6 Installation Replaced Figures 6 13 6 14 6 15 and 6 16 in Section 6 Installation with Figures 6 14 and 6 15 Revised manual to change model references for the current transformer shorting connector and for respective wiring harness part numbers See Note Rear Panel Plu...

Page 8: ...1 in the Command Characteristics subsection in Section 3 Communications Added COM and LOOP commands revised Table 3 11 and Table 3 12 for new Mirrored Bits settings requirements corrected target number ranges in TARGET command description and Table 3 15 fixed the arrows in Table 3 18 and Table 3 19 all in the Description of Commands subsection in Section 3 Communications Corrected the EBLKD and ET...

Page 9: ...x A Firmware Versions in This Manual Appendix B SEL 321 Main Board Jumper Connector and Socket Locations Appendix C Application Guidelines Appendix D ONEBUS Program to Compute Test Set Settings for Testing Distance Relays Appendix E SEL 5601 Analytic Assistant Appendix F Special Application Settings Appendix G Additional SEL 321 1 Relay Communications Protocol Appendix H MIRRORED BITS Communicatio...

Page 10: ......

Page 11: ...Version 1 2 Figure 1 2 SEL 321 Rear Panel One I O Board Version showing conventional terminal blocks other options are available 1 2 Figure 1 3 SEL 321 Rear Panel Two I O Board Version showing plug in connectors option other options are available 1 3 Figure 1 4 Three Phase and Phase Phase Distance Characteristics 1 3 Figure 1 5 Ground Distance Characteristics 1 4 Figure 1 6 Instantaneous Definite ...

Page 12: ......

Page 13: ...mples and illustrations of relay uses are given sound judgment must be exercised at all times in its application The manual is divided into sections with the following information Section 1 Introduction General information Section 2 Specifications Detailed technical description of each feature Section 3 Communications User interface and protocol Section 4 Event Reporting Describes content and use ...

Page 14: ...al From Front Panel Set relay Switch setting groups Read meter and other data Password protection Figure 1 1 SEL 321 Front Panel One I O Board Version Figure 1 2 SEL 321 Rear Panel One I O Board Version showing conventional terminal blocks other options are available ...

Page 15: ...EL 321 Rear Panel Two I O Board Version showing plug in connectors option other options are available Figure 1 4 Three Phase and Phase Phase Distance Characteristics Four mho zones Two quadrilateral zones for OOS Two load zones Set only characteristics you need All zones reversible ...

Page 16: ...o none or both Figure 1 6 Instantaneous Definite Time and Time Overcurrent Characteristics Four US four IEC curve families Phase residual and negative sequence elements Torque controllable by distance and directional elements One cycle or electro mechanical reset char acteristics Four instantaneous definite time elements for negative sequence and for residual overcurrent ...

Page 17: ...IC VA VB VC 3I0 3I1 3I2 Figure 1 8 SEL 5601 Analytic Assistant Oscillographic displays using the SEL 5601 Analytic Assistant and 16 samples cycle data Condensed 4 samples cycle reporting Full report gives com plete state of inputs outputs and elements every 1 16 cycle Read the ASCII text format with any computer no proprietary formats are used Event Reporting Provides four types of event reports A...

Page 18: ...local and remote bus overvoltages Sensitive negative sequence and residual over current elements provide sensitive backup protection Tapped and Three Terminal Lines Four zones Two zero sequence compensation factors for more accurate ground distance reach on either side of tap Independent reach settings for phase ground mho and ground reactance elements Multiple setting groups cover any switching c...

Page 19: ...et three phase distance elements Time step backup Zone 1 Extension Schemes Settable Zone 1 extension multiplier Settable Zone 1 extension enable delay Direct Underreaching Transfer Tripping Schemes DUTT SELOGIC control equations program which elements key direct trip Other Features Fault locator Metering Automatic self testing Forty event report summaries stored in non volatile memory Three genera...

Page 20: ... and nonconventional sensor outputs are in primary quantities you must scale the relay settings using PTR Potential Transformer Ratio and CTR Current Transformer Ratio Determine the PTR setting by dividing the primary line neutral voltage by 67 V The CTR is determined by dividing your 1 per unit primary current by 5 A Use the PTR and CTR to determine the settings in secondary quantities Examples P...

Page 21: ...t 2 8 Positive Sequence Overvoltage Elements 2 8 Time Step Backup Logic Timers 2 8 Communications Assisted Tripping Schemes 2 9 Permissive Overreaching Transfer Trip POTT Logic 2 9 Directional Comparison Unblocking DCUB Logic 2 10 Directional Comparison Blocking DCB Logic 2 11 Creating Other Tripping Schemes 2 12 Permissive Underreaching Transfer Trip Schemes 2 12 Direct Underreaching Transfer Tri...

Page 22: ...Nominal Relay 2 49 General Element Ranges and Accuracy 2 49 General Specifications 2 51 Distance Element Operating Time Curves at Nominal Frequency 2 79 Time Overcurrent Curve Equations 2 80 Equations for US Curves 2 81 Equations for IEC Curves 2 82 TABLES Table 2 1 Relay Setting Structure 2 1 Table 2 2 Zone and Level Elements Affected by DIR1 DIR4 2 2 Table 2 3 Trip Coil Monitor Logic Input Assig...

Page 23: ... Phase Distance Element Logic 2 56 Figure 2 9 Supervisory Phase to Phase Overcurrent Elements 2 57 Figure 2 10 Zone 1 Mho Ground Distance Element Logic 2 57 Figure 2 11 Zone 2 Mho Ground Distance Element Logic 2 58 Figure 2 12 Zone 3 Mho Ground Distance Element Logic 2 58 Figure 2 13 Zone 4 Mho Ground Distance Element Logic 2 58 Figure 2 14 Zone 1 Quadrilateral Ground Distance Element Logic 2 59 F...

Page 24: ...gure 2 40 Pole Open Logic 2 76 Figure 2 41 Stub Protection Logic 2 76 Figure 2 42 Trip Coil Monitor Logic 2 76 Figure 2 43 Close Logic 2 77 Figure 2 44 Trip Suspicion Logic 2 77 Figure 2 45 Open Phase Alarm Logic 2 77 Figure 2 46 Trip Decision Logic for Phase A 2 78 Figure 2 47 Trip Latch Logic 2 78 Figure 2 48 Trip Unlatch Logic for Phase A 2 79 Figure 2 49 Ground and Phase Distance Speed Curves ...

Page 25: ...the parameters of the three EIA 232 ports Global Settings SET G command Assign contact inputs LCD illumination timeout and setting group switch delay Logic Settings SET L command Program tripping functions and output contacts using SELOGIC control equations All Remaining Settings SET command Select and set protective element boundaries and thresholds communications assisted trip and other schemes ...

Page 26: ...lements Elements with level labels are associated with negative sequence and residual overcurrent elements SETTING THE DIRECTION OF ZONES AND OVERCURRENT ELEMENTS The DIR1 DIR4 settings establish the direction of characteristics associated with Zones and Levels 1 4 Table 2 2 shows which elements are affected by DIR1 DIR4 Table 2 2 Zone and Level Elements Affected by DIR1 DIR4 Affected Characterist...

Page 27: ...3 50L4 Res O C Sup 50G1 50G2 50G3 50G4 k0 magnitude k01M k0M k0M k0M k0 angle k01A k0A k0A k0A Outputs Instantaneous Z1G Z2G Z3G Z4G Time Delayed Z2GT Z3GT Z4GT 1 50L1 is also used for open pole logic and trip unlatch logic The mho and quadrilateral characteristics share the same logical outputs Z1G Z4G Supporting Drawings Figure 2 10 through Figure 2 18 OUT OF STEP OOS CHARACTERISTICS The rectang...

Page 28: ...rip Condition OST These outputs may be used for alarming or controlling other equipment Supporting Drawings Figure 2 19 and Figure 2 20 LOAD ENCROACHMENT CHARACTERISTICS The load encroachment feature permits setting the distance protection independent of the line loading Two independent positive sequence impedance characteristics monitor load conditions When load is in either of these characterist...

Page 29: ...y settable and the forward and reverse characteristics have independent negative sequence overcurrent supervision Thus forward and reverse sensitivity and selectivity are user settable Both characteristics are supervised by a negative to positive sequence current ratio I2 I1 check This supervision restrains the negative sequence directional elements for three phase faults with errant I2 The a2 set...

Page 30: ...awings Figure 2 23 through Figure 2 26 TIME OVERCURRENT ELEMENTS SEL 321 1 RELAY ONLY Phase negative sequence and residual time overcurrent elements are available as enabled Both US and IEC curve shapes are supported The phase element uses the highest measured phase current while the negative sequence and residual current elements use 3I2 and IR currents respectively Settings Phase Residual Neg Se...

Page 31: ... Time Delayed Directional Outputs IR 67N1 67N2T 67N3T 67N4T 3I2 67Q1 67Q2T 67Q3T 67Q4T The negative sequence directional elements 32QF and 32QR provide the directional supervision for 67N1 67N4 and 67Q1 67Q4 elements The 32QF element supervises the forward looking overcurrent elements while the 32QR element supervises those set in the reverse direction Forward set elements are supervised by SPO Al...

Page 32: ... positive sequence replica line impedance I1 is the positive sequence current and a1 is a settable scale factor Settings Mag Delay I1 Comp Zero Seq O V 59N Bus Phase U V 27L Bus Phase O V 59L V1 Local O V 59PB 59PBD V1 Remote O V 59PR 59PRD a1 Outputs 1 3 Seq Use in Other Logic Zero Seq O V 59N Weak Infeed Logic Neg Seq O V 59QL Loss of Potential Logic Bus Phase U V 27L 3P27 Weak Infeed Logic 27L ...

Page 33: ...ples are discussed later in this section To use a communications scheme select and set the scheme and program inputs and outputs to monitor and control the communications receiver and transmitter Permissive Overreaching Transfer Trip POTT Logic This logic performs the following tasks Keys the communications equipment to send permissive trip when any element you include in the MTCS logic variable a...

Page 34: ... receiver through an input programmed to the LOG function The typical application is a POTT scheme using FSK carrier as the communications medium External Inputs Received Permissive Trip Signal PT Assign PT to a programmable input Drive with receiver output Loss of Guard LOG Assign LOG to a programmable input Drive with contact from communications equipment Timer Settings Guard Present Delay GARD1...

Page 35: ...Trip Signal BT Assign BT to a programmable input Drive with block trip receive output Timer Settings Zone 3 Dropout Extension Delay Z3XD Current reversal guard timer Block Receive Extension Delay BTXD Sets reset time of block trip received condition after the reset of block trip input Zone 2 Phase 21 M2P Carrier Coord Delay Z2PSD Delays M2P element output Zone 2 Ground 21 Z2G Carrier Coord Delay Z...

Page 36: ...l when any Zone 1 element asserts Single Pole Trip Applications Assign inputs to DTA DTB and DTC Assertion of an input causes the corresponding trip variable to assert Direct Transfer Trip Schemes Three Pole Trip Applications Assign an input to DT Direct Trip Program this element in the unconditional trip variable to trip the breaker upon assertion of the DT input Program an output contact with a ...

Page 37: ...se signal to the breaker s Logic Output Extend Zone 1 Reaches Z1X When asserted Zone 1 reaches are extended Supporting Drawing Figure 2 35 Remote End Just Opened REJO Logic The REJO logic accelerates tripping for one or two phase in section faults without using a communications channel This logic generates a tripping condition if any elements in the MTCS variable assert and a REJO condition exists...

Page 38: ...AEND Sets minimum time after all breaker poles open before activating SOTF logic SOTF Time Duration SOTFD Sets how long tripping by elements in MTO is active following breaker closure High Set Phase O C Pickup 50H Logic Output Switch Onto Fault Logic Enabled SOTFE Enables three pole tripping by elements in MTO logic variable Supporting Drawing Figure 2 37 Loss of Potential LOP Logic This logic det...

Page 39: ...hase overcurrent threshold for blocking LOP during faults and for use in stub protection logic Neg Seq V2 O V Pickup 59QL Sets V2 threshold for detecting one or two blown fuses Pos Seq V1 O V Pickup 59PL Sets V1 threshold for detecting three blown fuses Outputs LOP indication LOP Always available even if ELOP N or N1 Does not block distance elements Internal LOP block ILOP Enabled by ELOP Y Y1 or ...

Page 40: ...en Pole Delay TOPD Any trip which occurs while TOPD is timing results in a three pole trip Outputs Phase A Open SPOA Blocks 21AG 21AB and 21CA elements Phase B Open SPOB Blocks 21BG 21AB and 21BC elements Phase C Open SPOC Blocks 21CG 21BC and 21CA elements Single Pole Open SPO Blocks all quadrilateral ground distance clears LOP and asserts 32QF Includes SPOD delay Three Pole Open 3PO Blocks all g...

Page 41: ...tely close a circuit breaker with the CLOSE command This command is available in the Breaker and Level 2 access levels Both of these levels have separate passwords Issuing the CLOSE command asserts the CC element if the breaker is open Use a SELOGIC control equation to program the CC element to any output contact connected to the closing circuit of the breaker The CC element asserts for 30 cycles ...

Page 42: ... AB and BC phase distance elements FIDS Selects C phase FSC Enables C phase ground distance and blocks BC and CA phase distance elements Open Phase Alarm Logic This logic detects negative sequence current in the presence of balanced voltages when all poles of the breaker are closed This condition asserts an alarm element labeled OPA Use a SELOGIC control equation to program OPA to an output contac...

Page 43: ... Block PARA Assert to block A phase ground distance protection Parallel B phase Block PARB Assert to block B phase ground distance protection Parallel C phase Block PARC Assert to block C phase ground distance protection Bkr 1 Position 52A1 Drive with Bkr 1 auxiliary in 3PT applications1 Bkr 2 Position 52A2 Drive with Bkr 2 auxiliary in 3PT applications2 Bkr 1 A phase Pole Position 52AA1 Monitors ...

Page 44: ...int 9 LP9 Controls general purpose element LP9 Logic Point 10 LP10 Controls general purpose element LP10 Ext Trip Unlatch EXTUL Assert to unlatch TPA TPB TPC and 3PT Invert the sense of any input assignment by including the SELOGIC control equation invert operator immediately in front of the input assignment e g 52A1 changes a 52a input to a 52b input 1 52AA1 52AB1 and 52AC1 follow 52A1 if they ar...

Page 45: ...g keying communications etc First refer to the rear panel wiring diagram and choose the specific output contacts you wish to assign to various functions For example assume you want OUT1 and OUT2 to be three pole trip outputs OUT3 to follow the CLOSE command and OUT4 to key communications Any output contact may be assigned for tripping duty When you are designing your trip condition event trigger a...

Page 46: ...he symbol be asserted before the logical condition is true The following setting closes the OUT9 output contact when either the M1P or 27L element asserts OUT9 M1P 27L Invert Inverts the value of the element immediately following the symbol For example to block the 50H element if the voltages of all three phases are below the 27L threshold program the SELOGIC control equations as 50H 3P27 Insert a...

Page 47: ...ent list Within Table 2 10 before means those elements to the right of the one being programmed 3 Table 2 5 lists combinations of SELOGIC control equation operators that are not acceptable Table 2 5 Unacceptable SELOGIC Control Equation Operator Combinations Program any single internal use element from Table 2 12 to an output contact as long as nothing else is programmed to that output Programming...

Page 48: ...P 50G 50PP 50M 50L 9 50Q4 50Q3 50Q2 50Q1 50N4 50N3 50N2 50N1 10 50ABC X6ABC X5ABC 3PT TPC TPB TPA 32QF 11 3P59 59L 59N 59PR 59PB 59QL 59PL 50Q 12 BTX STOP START FIDEN FSC FSB FSA 13 32QR Z1X CC EKEY Z3RB ATB ECTT KEY 14 XAG4 XAG3 XAG2 XAG1 MAG4 MAG3 MAG2 MAG1 15 XBG4 XBG3 XBG2 XBG1 MBG4 MBG3 MBG2 MBG1 16 XCG4 XCG3 XCG2 XCG1 MCG4 MCG3 MCG2 MCG1 17 MBC4 MBC3 MBC2 MBC1 MAB4 MAB3 MAB2 MAB1 18 SPOC SPO...

Page 49: ...rent 67Q4T 67Q3T 67Q2T OST 67N4T 67N3T 67N2T OSB Level 4 Directional Neg Seq Overcurrent Time Delayed Level 3 Directional Neg Seq Overcurrent Time Delayed Level 2 Directional Neg Seq Overcurrent Time Delayed Out of Step Trip Condition Declaration Level 4 Directional Residual Overcurrent Time Delayed Level 3 Directional Residual Overcurrent Time Delayed Level 2 Directional Residual Overcurrent Time...

Page 50: ...nstantaneous Level 1 Nondirectional Residual Overcurrent Instantaneous 50ABC X6ABC X5ABC 3PT TPC TPB TPA 32QF OOS Supervising Overcurrent Element Pos Seq Instantaneous Zone 6 Out of Step Distance Element Instantaneous Zone 5 Out of Step Distance Element Instantaneous Three Pole Trip Trip C Trip B Trip A Negative Sequence Directional Element Forward 3P59 59L 59N 59PR 59PB 59QL 59PL 50Q Three Phase ...

Page 51: ... Ground Distance B phase Zone 4 Quadrilateral Ground Distance B phase Zone 3 Quadrilateral Ground Distance B phase Zone 2 Quadrilateral Ground Distance B phase Zone 1 Mho Ground Distance B phase Zone 4 Mho Ground Distance B phase Zone 3 Mho Ground Distance B phase Zone 2 Mho Ground Distance B phase Zone 1 XCG4 XCG3 XCG2 XCG1 MCG4 MCG3 MCG2 MCG1 Quadrilateral Ground Distance C phase Zone 4 Quadrila...

Page 52: ... 52A2 TCM1 and TCM2 elements using the SET G command Section 3 Communications gives detailed instructions on the use of the SET G command The 52A1 52A2 TCM1 and TCM2 elements listed in Table 2 4 are unique due to the fact that they allow a single input to control three functional elements for three pole trip applications where single phase information is unavailable Use inputs LP1 through LP10 for...

Page 53: ...trol equations V Equation Output Instantaneous Table 2 12 lists internal elements which may be used singly to control output contacts for testing purposes but are not available for SELOGIC control equations Use SELOGIC control equations to define MER MTO MTU and MTCS MER controls triggering of event reports MTO MTU and MTCS establish tripping conditions Table 2 12 Internal Elements TAR Elements 27...

Page 54: ... 1 50AL4 50AL3 50AL2 50AL1 VPOLV N3PT L3PT PTRX A phase Supervisory Overcurrent Zone 4 A phase Supervisory Overcurrent Zone 3 A phase Supervisory Overcurrent Zone 2 Af Supervisory Overcurrent Zone 1 Positive Sequence Polarizing Voltage Valid Not Three Pole Trip Line Three Pole Trip Permissive Trip Received 50CL4 50CL3 50CL2 50CL1 50BL4 50BL3 50BL2 50BL1 C phase Supervisory Overcurrent Zone 4 C pha...

Page 55: ...B 52AA SPTE asserted or ESPT Y or Y1 Reserved For Future Use Reserved For Future Use Reserved For Future Use Reserved For Future Use Breaker s Auxiliary Contact Pole C Breaker s Auxiliary Contact Pole B Breaker s Auxiliary Contact Pole A 50AB4 50AB3 50AB2 50AB1 ATPC ATPB ATPA 50PPL AB Overcurrent Supervision Zone 4 AB Overcurrent Supervision Zone 3 AB Overcurrent Supervision Zone 2 AB Overcurrent ...

Page 56: ...2 15 Input Output Contact Targets Two I O Board Version SEL 321 Relay Only TAR Status Indicators 38 OUT1 OUT2 OUT3 OUT4 OUT5 OUT6 OUT7 OUT8 39 OUT9 OUT10 OUT11 OUT12 OUT13 OUT14 OUT15 ALARM 40 OUT17 OUT18 OUT19 OUT20 OUT21 OUT22 OUT23 OUT24 41 OUT25 OUT26 OUT27 OUT28 OUT29 OUT30 OUT31 OUT32 42 IN8 IN7 IN6 IN5 IN4 IN3 IN2 IN1 43 IN16 IN15 IN14 IN13 IN12 IN11 IN10 IN9 The following tables show addit...

Page 57: ...diate Elements SEL 321 1 Relay Only TAR Elements 28 ZT Z YT Y XT X W V Table 2 19 Intermediate Element Summary SEL 321 1 Relay Only Element Comment ZT Z YT Y XT X W V SELOGIC control equations Z Equation Output Time Delayed SELOGIC control equations Z Equation Output Instantaneous SELOGIC control equations Y Equation Output Time Delayed SELOGIC control equations Y Equation Output Instantaneous SEL...

Page 58: ...nd Resistance Blinder Zone 3 A phase Ground Resistance Blinder Zone 2 A phase Ground Resistance Blinder Zone 1 Mask to Trigger Event Report Variable Mask for Trip Breaker Open Variable Mask for Trip Unconditional Variable Mask for Trip Communications Scheme Variable RCG4 RCG3 RCG2 RCG1 RBG4 RBG3 RBG2 RBG1 C phase Ground Resistance Blinder Zone 4 C phase Ground Resistance Blinder Zone 3 C phase Gro...

Page 59: ...ercurrent Supervision Element Picked Up Any A phase Overcurrent Supervision Element Picked Up Reserved For Future Use OSB4 OSB3 OSB2 OSB1 50PP4 50PP3 50PP2 50PP1 Out of Step Block Zone 4 Out of Step Block Zone 3 Out of Step Block Zone 2 Out of Step Block Zone 1 Phase to Phase Supervisory Overcurrent Zone 4 Phase to Phase Supervisory Overcurrent Zone 3 Phase to Phase Supervisory Overcurrent Zone 2 ...

Page 60: ...urrent Supervision Zone 1 51NR 51QR 51PR Reserved For Future Use Residual Time Overcurrent Element Resetting Negative Sequence Time Overcurrent Element Resetting Phase Time Overcurrent Element Resetting Reserved For Future Use Reserved For Future Use Reserved For Future Use Reserved For Future Use Table 2 22 shows the status indicators for the input and output contacts for one I O board relays Tab...

Page 61: ... Comment MIRBRK MIRFRA MIRPAR MIROVR MIRIN MIRSYC MIRDAT MIRDIS Break detected on MIRRORED BITS communication channel Framing error detected on MIRRORED BITS communication channel Parity error detected on MIRRORED BITS communication channel Data received too quickly on MIRRORED BITS communication channel Too much idle time detected on MIRRORED BITS communication channel Synchronization request rec...

Page 62: ...s active the SEL 321 Relay trips single pole for the following trip conditions Zone 1 SLG faults detected by the ground distance elements Zone 2 SLG faults detected by the ground distance elements and permitted to trip through the communications scheme logic DTA DTB DTC assigned and asserted See the special single pole tripping appendix Appendix F for other schemes All other tripping conditions in...

Page 63: ...ion setting Option Setting Description N TULO N Time delayed dropout extension 1 TULO 1 Undercurrent unlatch 2 TULO 2 Breaker auxiliary unlatch 3 TULO 3 Requires conditions of Options 1 and 2 4 TULO 4 Unlatch when input assigned to EXTUL asserts Supporting Drawings Figure 2 46 through Figure 2 48 MULTIPLE SETTING GROUPS The relay has six independent setting groups Each group is a complete relay se...

Page 64: ...puts times instrument transformer ratio settings Accuracy 1 0 of nominal input at rated voltage and current SYSTEM FREQUENCY TRACKING The relay adjusts its sampling rate by monitoring the system frequency using a zero crossing detector on the A phase voltage input The relay can be ordered with a nominal frequency of either 60 or 50 Hz The frequency tracking range is 55 to 65 Hz for 60 Hz relays an...

Page 65: ...esents targets by two means A two row 16 column back lighted LCD display Two rows of eight target indicator LEDs The LCD display shows the detailed information pertaining to a fault detected by the relay displaying metering information relay self test status information etc The LEDs designations are shown in Figure 2 3 Figure 2 3 SEL 321 Front Panel Targeting General Target LED Description Under n...

Page 66: ...s a result of the communications assisted trip logic SOTF Definition Switch onto fault tripping event SOTFE is asserted ZONE 1 Definition Zone 1 or Level 1 element asserted Illuminates if any of the following elements are asserted M1P Z1G 67N1 or 67Q1 ZONE 2 Definition Zone 2 or Level 2 element asserted Illuminates if any of the following elements assert and like elements of shorter reach are not ...

Page 67: ...of the following elements are asserted Z1G Z4G 67N1 67N4 Q Definition Negative sequence current detected Illuminates if 51QP or 50Q1 50Q4 are asserted 51 Definition Time overcurrent element timed out Illuminates if 51PT 51QT or 51NT are asserted 50 Definition Level 1 4 high set or Stub Logic overcurrent elements are asserted Illuminates if any of the following elements listed are asserted 67N1 ZON...

Page 68: ...lay digital communications only one port See Appendix H Baud Rate 300 1200 2400 Default 4800 9600 19 2 k 38 4 k 300 1200 2400 default 4800 9600 19 2 k N A Data Bits 8 Default 7 6 8 N A Parity N Default E O N N A N None E Even O Odd Stop Bits 1 Default 2 1 N A Time 0 30 Minutes N A Out 0 Default 5 Default 0 Port does not timeout Auto Y N N A Y Designated auto N Not auto N Default Y Default RTS_CTS ...

Page 69: ...relay functions Connect the rear panel port marked DEMODULATED IRIG B to synchronize to an external time source Without an external IRIG B time code source the internal time clock drift rate is 0 086 sec day With IRIG B the internal clock is synchronized to within 1 ms of the time source Note that without an external IRIG B time code source the date and time must be set whenever the relay power is...

Page 70: ...Yes Latched 12 V REG 11 5 11 2 12 5 14 0 W F No Yes Latched 15 V PS 14 6 14 0 15 60 16 0 W F No Yes Latched TEMP 40 C 50 C 80 C 95 C W F No Yes Latched CHANNEL OFFSETS 30 mV W No Pulsed MASTER OFFSET 20 mV 30 mV W F No Yes Pulsed Latched SEL 321 1 Relays manufactured since September 1996 are equipped with a new global setting ERESTART When ERESTART Y the relay performs a power up reset when a CR_R...

Page 71: ...20 Ω 90 to 90 90 to 270 Distance Element Accuracy Secondary Steady State Error 5 of set reach 0 05 Ω at line angle LA for V 5 V and I 0 4 A 10 of set reach 0 05 Ω at LA for 1 V V 5 V and 0 2 A I 0 4 A Transient Overreach Error 5 of set reach plus steady state error Negative Sequence Directional Element Secondary Positive Sequence Current Restraint Range Secondary Forward Directional Current Superv...

Page 72: ...teps US 0 05 1 in 0 01 steps IEC Timing 4 and 1 5 cycles for current magnitudes between 2 and 20 multiples of pickup Nondirectional Residual Neg Seq Overcurrent Secondary Pickup setting range 0 05 16 A 0 01 A 3 of setting Transient Overreach 5 of pickup Overvoltage Pickup 0 150 V 5 of setting 1 V Transient Overreach 5 of pickup Undervoltage Pickup 0 100 V 5 of setting 1 V Transient Overreach 5 of ...

Page 73: ...4 Ω 90 to 90 90 to 270 Distance Element Accuracy Secondary Steady State Error 5 of set reach 0 01 Ω at line angle LA for V 5 V and I 2 A 10 of set reach 0 01 Ω at LA for 1 V V 5 V and 1 A I 2 A Transient Overreach Error 5 of set reach plus steady state error Negative Sequence Directional Element Secondary Positive Sequence Current Restraint Range Secondary Forward Directional Current Supervision S...

Page 74: ...eps US 0 05 1 in 0 01 steps IEC Timing 4 and 1 5 cycles for current magnitudes between 2 and 20 multiples of pickup Nondirectional Residual Neg Seq Overcurrent Secondary Pickup setting range 0 25 80 A 0 05 A 3 of setting Transient Overreach 5 of pickup Overvoltage Pickup 0 150 V 5 of setting 1 V Transient Overreach 5 of pickup Undervoltage Pickup 0 100 V 5 of setting 1 V Transient Overreach 5 of p...

Page 75: ...7 VL N three phase four wire connection 150 VL N continuous connect any voltage up to 150 Vac 365 Vac for 10 seconds Burden 0 13 VA 67 V 0 45 VA 120 V Power Supply Rated 125 250 Vdc or Vac Range 85 350 Vdc or 85 264 Vac Burden 25 W Rated 48 125 Vdc or 125 Vac Range 38 200 Vdc or 85 140 Vac Burden 25 W Rated 24 48 Vdc Range 18 60 Vdc polarity dependent Burden 25 W Output Contacts Standard 30 A make...

Page 76: ...ake 6 A continuous carry MOV protected 330 Vdc Pickup time 200 µs Dropout time 8 ms typical Breaking Capacity 10 000 operations 48 V 10 A L R 40 ms 125 V 10 A L R 40 ms 250 V 10 A L R 20 ms Cyclic Capacity 4 cycles second followed by 2 minutes idle for thermal dissipation 48 V 10 A L R 40 ms 125 V 10 A L R 40 ms 250 V 10 A L R 20 ms Note Fast high current interrupting output contacts are not polar...

Page 77: ...eption 4 3 2 2 Frequency sweep approx with 200 frequency steps per octave IEEE C37 90 2 Issued for trial use 1987 10 V m Exceptions 5 5 2 Performed with 200 frequency steps per octave 5 5 3 Digital Equipment Modulation Test not performed 5 5 4 Test signal turned off between frequency steps to simulate keying Surge Immunity IEC 61000 4 5 1995 Installation class 4 Note Using the following communicat...

Page 78: ...2 54 Specifications Date Code 20011026 SEL 321 321 1 Instruction Manual Figure 2 4 Logic Symbol Legend ...

Page 79: ...Date Code 20011026 Specifications 2 55 SEL 321 321 1 Instruction Manual Figure 2 5 Zone 1 Mho Phase Distance Element Logic Figure 2 6 Zone 2 Mho Phase Distance Element Logic ...

Page 80: ...2 56 Specifications Date Code 20011026 SEL 321 321 1 Instruction Manual Figure 2 7 Zone 3 Mho Phase Distance Element Logic Figure 2 8 Zone 4 Mho Phase Distance Element Logic ...

Page 81: ...Date Code 20011026 Specifications 2 57 SEL 321 321 1 Instruction Manual Figure 2 9 Supervisory Phase to Phase Overcurrent Elements Figure 2 10 Zone 1 Mho Ground Distance Element Logic ...

Page 82: ...tions Date Code 20011026 SEL 321 321 1 Instruction Manual Figure 2 11 Zone 2 Mho Ground Distance Element Logic Figure 2 12 Zone 3 Mho Ground Distance Element Logic Figure 2 13 Zone 4 Mho Ground Distance Element Logic ...

Page 83: ...ion Manual Figure 2 14 Zone 1 Quadrilateral Ground Distance Element Logic Figure 2 15 Zone 2 Quadrilateral Ground Distance Element Logic Figure 2 16 Zone 3 Quadrilateral Ground Distance Element Logic Figure 2 17 Zone 4 Quadrilateral Ground Distance Element Logic ...

Page 84: ...2 60 Specifications Date Code 20011026 SEL 321 321 1 Instruction Manual Figure 2 18 Supervisory Phase Overcurrent Elements ...

Page 85: ...Date Code 20011026 Specifications 2 61 SEL 321 321 1 Instruction Manual Figure 2 19 Out of Step Distance Element Logic ...

Page 86: ...2 62 Specifications Date Code 20011026 SEL 321 321 1 Instruction Manual Figure 2 20 Out of Step Block and Trip Logic ...

Page 87: ...Date Code 20011026 Specifications 2 63 SEL 321 321 1 Instruction Manual Figure 2 21 Load Encroachment Logic ...

Page 88: ...2 64 Specifications Date Code 20011026 SEL 321 321 1 Instruction Manual Figure 2 22 Negative Sequence Directional Element Logic ...

Page 89: ...e 20011026 Specifications 2 65 SEL 321 321 1 Instruction Manual Figure 2 23 Phase Time Overcurrent Element Logic SEL 321 Relay Base Version Figure 2 24 Phase Time Overcurrent Element Logic SEL 321 1 Relay Only ...

Page 90: ...2 66 Specifications Date Code 20011026 SEL 321 321 1 Instruction Manual Figure 2 25 Negative Sequence Time Overcurrent Element Logic ...

Page 91: ...Date Code 20011026 Specifications 2 67 SEL 321 321 1 Instruction Manual Figure 2 26 Residual Time Overcurrent Element Logic ...

Page 92: ...2 68 Specifications Date Code 20011026 SEL 321 321 1 Instruction Manual Figure 2 27 Negative Sequence Overcurrent Element Logic for Levels 1 4 ...

Page 93: ...Date Code 20011026 Specifications 2 69 SEL 321 321 1 Instruction Manual Figure 2 28 Residual Overcurrent Element Logic for Levels 1 4 ...

Page 94: ...2 70 Specifications Date Code 20011026 SEL 321 321 1 Instruction Manual Figure 2 29 Voltage Element Logic ...

Page 95: ...Date Code 20011026 Specifications 2 71 SEL 321 321 1 Instruction Manual Figure 2 30 Positive Sequence Overvoltage Element Logic Figure 2 31 Permissive Overreaching Transfer Trip Scheme Logic ...

Page 96: ...e 20011026 SEL 321 321 1 Instruction Manual Figure 2 32 Directional Comparison Unblocking Scheme Logic Figure 2 33 Directional Comparison Blocking Scheme Logic 1 of 2 Figure 2 34 Directional Comparison Blocking Scheme Logic 2 of 2 ...

Page 97: ...Date Code 20011026 Specifications 2 73 SEL 321 321 1 Instruction Manual Figure 2 35 Zone 1 Extension Logic Figure 2 36 Remote End Just Opened Logic Figure 2 37 Switch Onto Fault Enable Logic ...

Page 98: ...O R 59QL 59PL 50M ELOP Y Setting SPO LOP ILOP ELOP N1 Y1 Y2 Setting 50Q Setting Loss of Potential Logic Enable Block 3PO V1 I1 V0 I0 ELOP Y1 Y2 Setting 50QF 50QR DWG M321001 Relay Word Bits Relay Word Bits LPVNOM Factory Setting See Appendix F OSB Figure 2 38 Loss of Potential Logic ...

Page 99: ...Date Code 20011026 Specifications 2 75 SEL 321 321 1 Instruction Manual Figure 2 39 Pole Discordance and Trip During Pole Open Logic ...

Page 100: ...2 76 Specifications Date Code 20011026 SEL 321 321 1 Instruction Manual Figure 2 40 Pole Open Logic Figure 2 41 Stub Protection Logic Figure 2 42 Trip Coil Monitor Logic ...

Page 101: ...Date Code 20011026 Specifications 2 77 SEL 321 321 1 Instruction Manual Figure 2 43 Close Logic Figure 2 44 Trip Suspicion Logic Figure 2 45 Open Phase Alarm Logic ...

Page 102: ...2 78 Specifications Date Code 20011026 SEL 321 321 1 Instruction Manual Figure 2 46 Trip Decision Logic for Phase A Figure 2 47 Trip Latch Logic ...

Page 103: ...ms show operating times at each test point Operating times include output contact closure time for standard and interrupting duty contact outputs For the distance element test a fault was applied at a location representing a percentage of the Zone 1 relay reach setting Tests were performed for source impedance ratios SIR of 0 1 1 0 10 0 and 30 0 No pre fault load current or fault resistance was in...

Page 104: ... characteristics you desire Refer to Section 3 Communications for a complete description of the use of the SET command and selection of time overcurrent characteristics These time curve equations are valid for all time overcurrent elements Plots showing operating time versus multiples of pickup current are shown on the following pages The equations and curves apply while the product of the multipl...

Page 105: ...ve operating time tM M 1 For reset time tr M 1 Curve U1 Moderately Inverse See Figure 2 50 ú û ù ê ë é 1 M 0104 0 0226 0 TD t 02 0 m 2 r M 1 08 1 TD t Curve U2 Inverse See Figure 2 51 ú û ù ê ë é 1 M 95 5 180 0 TD t 2 m 2 r M 1 95 5 TD t Curve U3 Very Inverse See Figure 2 52 ú û ù ê ë é 1 M 88 3 0963 0 TD t 2 m 2 r M 1 88 3 TD t Curve U4 Extremely Inverse See Figure 2 53 ú û ù ê ë é 1 M 67 5 0352 ...

Page 106: ... 54 ú û ù ê ë é 1 M 14 0 TD t 02 0 m 2 r M 1 5 13 TD t Beyond 20 multiples of pickup all characteristics become definite time equal to the time of M 20 Curve C2 Very Inverse See Figure 2 55 ú û ù ê ë é 1 M 5 13 TD tm 2 r M 1 3 47 TD t Curve C3 Extremely Inverse See Figure 2 56 ú û ù ê ë é 1 M 0 80 TD t 2 m 2 r M 1 80 TD t Curve C4 Long Time Backup See Figure 2 57 ú û ù ê ë é 1 M 0 120 TD tm M 1 12...

Page 107: ...Date Code 20011026 Specifications 2 83 SEL 321 321 1 Instruction Manual Figure 2 50 Time Curve U1 Figure 2 51 Time Curve U2 Figure 2 52 Time Curve U3 Figure 2 53 Time Curve U4 ...

Page 108: ...2 84 Specifications Date Code 20011026 SEL 321 321 1 Instruction Manual Figure 2 54 Time Curve C1 Figure 2 55 Time Curve C2 Figure 2 56 Time Curve C3 Figure 2 57 Time Curve C4 ...

Page 109: ...els 3 6 Command Format 3 6 Description of Commands 3 6 2ACCESS 3 6 ACCESS 3 7 BREAKER 3 7 CLOSE 3 7 COMM 3 8 CONTROL n SEL 321 1 Relay Only 3 9 COPY m n 3 10 DATE 3 10 EVENT 3 11 GROUP 3 11 HISTORY 3 12 IRIG 3 13 LOOP 3 14 METER 3 15 OPEN 3 15 PASSWORD 3 16 PULSE n t SEL 321 1 Relay Only 3 17 QUIT 3 17 RDMEM m SEL 321 1 Relay Only 3 17 SET Commands 3 17 SET n 3 19 SHOWSET 3 22 SET G 3 23 SHOWSET G...

Page 110: ...rt Description 3 13 Table 3 5 Variations on the SET Command 3 18 Table 3 6 Editing Keys for SET Commands 3 19 Table 3 7 Group SET Fail Messages 3 20 Table 3 8 SET or SET G Warning Messages 3 21 Table 3 9 SET G Fail Messages 3 24 Table 3 10 SET L Fail Message 3 27 Table 3 11 SET P Fail Message 3 28 Table 3 12 SET P and SHOWSET P Description 3 29 Table 3 13 Status Report Description 3 31 Table 3 14 ...

Page 111: ... race conditions when two ports are addressed simultaneously Note In this manual commands you type appear in bold uppercase OTTER Keys you press appear in bold uppercase brackets ENTER Relay output appears boxed and in the following format EXAMPLE BUS B BREAKER 3 Date 02 01 93 Time 00 03 25 180 COMMUNICATIONS PROTOCOL The communications protocol consists of hardware and software features Software ...

Page 112: ...ssion should terminate at the end of the message in progress when XOFF is received and may resume when the relay sends XON 4 You can use an XON XOFF procedure to control the relay during data transmission When the relay receives an XOFF command during transmission it pauses until it receives an XON command If there is no message in progress when the relay receives an XOFF command it blocks transmi...

Page 113: ...Table 3 1 Table 3 1 Commands With Alarm Conditions Command Condition 2ACCESS Entering Access Level 2 or Three wrong password attempts ACCESS Three wrong password attempts BREAKER Entering Breaker Access Level or Three wrong password attempts COPY Copying a group into the active setting group GROUP Changing the active setting group PASSWORD Any password is changed SET commands Changing the global s...

Page 114: ...ime 23 31 17 489 Active Group 2 Group Variable 2 Status Report SEE THE STATUS COMMAND FOR THE FORMAT OF THE STATUS REPORT Summary Event Report SEE THE EVENT REPORTING SECTION FOR THE FORMAT OF THE SUMMARY EVENT REPORT On CR_RAM failure if ERESTART Y SEL 321 1 Relay only EXAMPLE BUS B BREAKER 3 Date 02 01 93 Time 23 31 17 489 Detected Critical RAM Failure The Relay Is Restarting COMMAND CHARACTERIS...

Page 115: ... only those commands listed under Access Level 1 in Figure 3 1 Breaker Access Level Allows access to CLOSE OPEN and GROUP commands in addition to Access Level 1 commands Access Level 2 Allows access to COPY PASSWORD TARGET and SET com mands plus all commands at lower levels This access scheme allows you to give personnel access to only those functions they require Each level has an associated scre...

Page 116: ...s and passwords shown in Figure 3 1 Command Format Commands consist of three or more characters only the first three characters of any command are required You may use upper or lower case characters without distinction except in passwords You must separate arguments from the command by spaces commas semicolons colons or slashes Enter commands after the terminal displays the access level prompt DES...

Page 117: ...if the ALARM contact is connected to a monitoring system BREAKER Use the BREAKER command to enter breaker control access Access Level B A password is required to access this level The default password for this level is set to EDITH at the factory use the PASSWORD command to change this password The following display indicates successful access BREAKER ENTER BREAKER ENTER BREAKER ENTER BREAKER ENTE...

Page 118: ... BREAKER Y N Y ENTER Y ENTER Y ENTER Y ENTER Are you sure Y N Y ENTER Y ENTER Y ENTER Y ENTER Breaker CLOSED COMM The COMM command displays integral relay to relay communications data To get a summary report enter the command without any parameters COMM ENTER COMM ENTER COMM ENTER COMM ENTER EXAMPLE BUS B BREAKER 3 Date 04 11 00 Time 10 45 08 993 SEL 321 POTT FID SEL 321 1 R424 V656124pb Z001001 D...

Page 119: ...erse the order of the COMM records in the report supply a range of row numbers with the larger number first i e COMM 40 10 L ENTER To display all the COMM records that started on a particular day supply that date as a parameter i e COMM 2 8 98 L ENTER To display all the COMM records that started between a range of dates supply both dates as parameters i e COMM 2 21 98 2 7 98 L ENTER Reversing the ...

Page 120: ...If you enter one setting group with the SET command you can copy it to other groups with the COPY command Use SET to modify copied setting groups If you copy settings to a group for which event reports exist those event reports will show SETTINGS CHANGED SINCE EVENT when recalled with the EVE command The ALARM output contact closes momentarily when you change settings in an active setting group CO...

Page 121: ... event data are lost when event buffers are cleared However the relay retains a short history of each of the 40 newest events in non volatile memory see the HISTORY command Note Adding a space M following the format selector replaces OUT1 OUT8 with TMB1 TMB8 and IN1 IN8 with RMB1 RMB8 If an event buffer is empty when you request an event the relay returns an error message EVEN EVEN EVEN EVENT 12 E...

Page 122: ...by calculating the time difference between the first event report generated at fault inception and the second event report generated at the trip The history is retained in non volatile EEPROM so it is there through power failures Enter HISTORY C to clear the history archive Enter HISTORY n where n is a positive number to limit the history report to the most recent n events The date time and type o...

Page 123: ...RIP Report triggered by TPA TPB TPC or 3PT assertion no fault EXT Report triggered by assertion of EXT external trigger designated input EXTC Report triggered by TRIGGER command ER Report triggered by MER SELOGIC control equations but no fault detecting element asserted in event report LOCAT 94 95 Distance to fault Entry may be if the fault locator is unable to generate a reliable location GRP 1 G...

Page 124: ...its own data looped back as its input In this mode LBOK will assert if error free data is received The LOOP command without any additional parameters enables looped back mode for 5 minutes while the inputs are forced to the default values LOOP ENTER LOOP ENTER LOOP ENTER LOOP ENTER Loopback will be enabled on the Mirrored Bits port for the next 5 minutes The RMB values will be forced to default va...

Page 125: ...ecuted from the front panel see Meter Display under LCD Functions and Front Panel Commands OPEN The 3PT element asserts in response to the OPEN command If 3PT or TPA TPB and TPC are assigned to outputs with the SET L command the command will trip the breaker The 3PT condition remains closed for a minimum duration TDURD setting starting with the rising edge of the TRIP output The 3PT condition drop...

Page 126: ...ORD 1 BIKE ENTER Set The relay sets the password pulses the ALARM relay closed for approximately one second and transmits the response Set to the display After entering new passwords type PASSWORD ENTER to inspect them Make sure they are what you intended and record the new passwords Passwords can be any length up to six numbers letters or any other printable characters except delimiters space com...

Page 127: ...and when you finish communicating with the relay to prevent unauthorized access Control returns to Access Level 0 automatically after a settable interval see TIMEOUT in Table 3 12 of no activity QUIT ENTER QUIT ENTER QUIT ENTER QUIT ENTER EXAMPLE BUS B BREAKER 3 Date 02 01 93 Time 15 15 32 161 RDMEM m SEL 321 1 Relay Only The RDMEM command allows you to read the contents of selected relay memory a...

Page 128: ...f disabled Yes SET G Global settings SET G SET G IN1 Set input assignments Set front panel timeout Set group change delay Set global settings starting at entry IN1 Yes SET P Set communications port parameters SET P SET P 1 SET P 1 RTS_CTS Set active port Set Port 1 Set Port 1 starting at RTS_CTS entry Yes SET L Program SELOGIC control equations SET L SET L 1 SET L OUT2 SET L 1 OUT2 Program trippin...

Page 129: ...r SET A to access all settings in the active group regardless of whether or not the setting is disabled Enter SET 4 A to set all settings within Group 4 Enter SET 4 EOOS A to set all settings within Group 4 starting with the EOOS setting The following screen is displayed by typing SET 2 You are prompted to edit each setting by a You are first prompted for a 17 character relay identifier string the...

Page 130: ...d a warning message in Table 3 8 is displayed Assign the inputs with the SET G command While the active settings are updated the relay is disabled and the ALARM output contacts close and all timers and relay elements reset Table 3 7 Group SET Fail Messages SET Groups Comment UBEND must be less than UBDURD Settings for UBEND or UBDURD timers improperly set Z2F must be less than Z2R by at least 0 1 ...

Page 131: ...CB scheme disabled if BT is not assigned to an input EXTUL must be assigned to an input contact to use TULO 4 TULO is set to 4 but EXTUL is not assigned Logic scheme disabled LOG must be assigned to an input contact since DCUB is enabled DCUB scheme disabled because LOG is not assigned to an input PT must be assigned to an input contact since POTT is enabled POTT scheme disabled because PT is not ...

Page 132: ...0 00 CTR 200 0 PTR 2000 0 PMHOZ 3 GMHOZ 3 QUADZ 3 DIR1 F DIR2 F DIR3 R DIR4 F Z1P 6 24 Z2P 9 36 Z3P 1 87 50PP1 2 55 50PP2 2 22 50PP3 2 45 Z1MG 6 24 Z2MG 9 36 Z3MG 1 87 XG1 6 24 XG2 9 36 XG3 1 87 RG1 2 50 RG2 5 00 RG3 6 00 50L1 0 90 50L2 0 90 50L3 1 30 50G1 0 90 50G2 0 60 50G3 0 50 k01M 0 726 k01A 3 69 k0M 0 726 k0A 3 69 T 0 00 EOOS N ELE Y ZLF 9 22 ZLR 9 22 PLAF 30 NLAF 30 PLAR 150 NLAR 210 Z2F 0 ...

Page 133: ...tection of a CR_RAM self test failure Below are shown the default global settings one I O board version 8 inputs SET G ENTER SET G ENTER SET G ENTER SET G ENTER Input Contact 1 Assignment IN1 52A1 Input Contact 2 Assignment IN2 PT Input Contact 3 Assignment IN3 CLOSE Input Contact 4 Assignment IN4 PTXFR Input Contact 5 Assignment IN5 NA Input Contact 6 Assignment IN6 NA Input Contact 7 Assignment ...

Page 134: ...e logic settings of a particular group Go to a specific logic setting by entering the logic setting label after the group number For example enter SET L 3 MTU to edit the MTU logic setting within Group 3 Enter parameters following SET command in any order Press ENTER to retain an existing setting and move to the next setting Press ENTER to retain an existing setting and move to the previous settin...

Page 135: ...oard version 15 outputs shown SET L 1 ENTER SET L 1 ENTER SET L 1 ENTER SET L 1 ENTER SELogic group 1 V NA W NA X NA Y NA Z NA MTCS M2P Z2G MTU M1P Z1G M2PT Z2GT 51NT 51QT 50MF MTO M1P M2P Z1G Z2G 50H MER M2P Z2G 51NP 51QP 50H LOP 52AA1 OUT1 3PT OUT2 3PT OUT3 CC OUT4 KEY OUT5 NA OUT6 NA OUT7 NA OUT8 NA OUT9 NA OUT10 NA OUT11 NA OUT12 NA ...

Page 136: ...A TMB6 NA TMB7 NA TMB8 NA V NA W NA X NA Y NA Z NA MTCS M2P Z2G MTU M1P Z1G M2PT Z2GT 51NT 51QT 50MF MTO M1P M2P Z1G Z2G 50H MER M2P Z2G 51NP 51QP 50H LOP 52AA1 OUT1 3PT OUT2 3PT OUT3 CC OUT4 KEY OUT5 NA OUT6 NA OUT7 NA OUT8 NA OUT9 NA OUT10 NA OUT11 NA Press RETURN to continue OUT12 NA OUT13 NA OUT14 NA OUT15 NA TMB1 NA TMB2 NA TMB3 NA ...

Page 137: ... does not allow you to set the programmable logic settings of the currently selected group Use the SHOWSET L command with a group number 1 6 to view the logic settings of any group You may enter parameters in any order following the SHOWSET command The following illustration shows a report from the one I O board version 15 outputs of the relay SHO L 1 ENTER SHO L 1 ENTER SHO L 1 ENTER SHO L 1 ENTE...

Page 138: ... Front Panel under LCD Functions and Front Panel Commands Note FAST_OP setting included in SEL 321 1 Relay only SET P SET P SET P SET P 1 ENTER 1 ENTER 1 ENTER 1 ENTER PROTOCOL SEL LMD MB MB8 PROTOCOL SEL BAUD RATE 300 38400 SPEED 2400 DATA BITS 6 7 8 DATA_BITS 8 PARITY O E N PARITY N STOP BITS 1 2 STOP 1 TIMEOUT 0 30 min TIMEOUT 0 SEND AUTO MESSAGES TO PORT Y N AUTO N ENABLE HARDWARE HANDSHAKING ...

Page 139: ...2400 DATA_BITS 8 PARITY N STOP 1 TIMEOUT 0 AUTO Y RTS_CTS N FAST_OP N Table 3 12 SET P and SHOWSET P Description Category Status Comment PORT 1 PORT 1 data shown XOFF RECEIVED N N XOFF command not received Y XOFF command CTRL S received and no CTRL Q command received from terminal If XOFF Y relay does not send data XOFF SENT N N XOFF message not sent by relay to connected terminal Y XOFF message s...

Page 140: ...Application Guide STATUS STATUS allows inspection of self test status The relay automatically executes the STATUS command whenever the self test software enters a warning or failure state If this occurs the relay transmits a STATUS report from the port s designated automatic see SET command AUTO setting Type STATUS 4 to view the status information four times The STATUS report format appears below ...

Page 141: ...owing value indicates out of tolerance condition RAM OK IC socket number in place of OK indicates failure ROM OK IC socket number in place of OK indicates failure A D OK A self test checks that all analog to digital conversion processes complete each sample period CR_RAM OK Critical RAM contents Global Group and Calibration settings are checked against their image in EEPROM If normal OK is display...

Page 142: ... an EEPROM failure TARGET The target command displays the target values and defines the target group used for each target display The relay maintains a separate target display for each relay display device the serial ports and the front panel display Entering TARGET displays the currently selected target group To view a different target enter the target number 0 48 after the target command use TAR...

Page 143: ...arate the hours minutes and seconds with colons semicolons spaces commas or slashes To set the clock to 23 30 00 enter TIME 23 30 00 ENTER TIME 23 30 00 ENTER TIME 23 30 00 ENTER TIME 23 30 00 ENTER 23 30 00 A quartz crystal oscillator provides the time base for the internal clock You can also set the time clock automatically through the relay time code input using a source of demodulated IRIG B t...

Page 144: ...op row of legends describes button functions for command selection and the bottom row describes specific commands within dialogues Push button commands and the corresponding LCD displays are discussed below Table 3 14 lists commands available from the front panel control pushbuttons Table 3 14 Commands Available From Front Panel Command Buttons See Table Format Application Minimum Access Level SET...

Page 145: ...command Target Reset The left most button is dedicated to the TARGET RESET function Pressing TARGET RESET causes the front panel LEDs to illuminate for a one second lamp test then all target LEDs are cleared except for the LED labeled EN which is illuminated It clears trips TPA TPB and TPC elements if the trip condition has gone away It clears automatic diagnostic messages from the front panel LCD...

Page 146: ...lay causes selected target to revert to default display of TAR 1 EXIT DEFAULT DISPLAY Defaults to display seen before TARGET button was pushed unless an event occurred that would normally update the display in which case the updated information will be displayed Fault Command Push the FAULT button to display event history records Use the and buttons to scroll between event records and the and butt...

Page 147: ...meter pairs MET IA 94 31 IB 76 05 Group Selector When you select GROUP from Access Level 1 the active group and the group variable are shown To change Groups from the front panel you first enter Access Level 2 or Breaker Access Level using the OTHER command see Password Access To change the group use the up arrow to increment the group variable the down arrow to decrement it When the desired group...

Page 148: ...V_PS 15 21 TEMP 26 1 RAM OK or U1 8 ROM OK or U28 31 A D OK or FAIL CR_RAM OK GRP1 6 GLO CAL or CODE EEPROM OK GRP1 6 GLO or CAL SETTINGS OK If one of these items has failed or is in a warning state a F or a W is appended to the message See also Table 2 28 Self Test Summary Table 3 17 Status Command Description Button Pushed Results Displayed Comment STATUS STATUS FAIL TEMP 20 1 If there is no fai...

Page 149: ...gs from the front panel you first enter Access Level 2 using the OTHER command see Password Access There are three settings options SET GROUP group settings Table 3 18 SET G global settings Table 3 19 and SET P port settings Table 3 20 When you select the setting dialogue the relay comes up in SET GROUP Push the Left or Right buttons to scroll the change settings options The following example begi...

Page 150: ...m of the list relay displays Save Settings YES NO prompt to end session Dist Zone Enable SELECT Next category on list selected Zone Levels Dir SELECT Next category on list selected Phase Distance SELECT Next category selected again Press SELECT button to enter the edit mode Pressing SELECT after making settings saves the settings when the session ends Pressing NO CANCEL at any time terminates exis...

Page 151: ... you have set the last variable of a sub group the next upper level menu item is displayed Repeat the process until all desired changes are made To exit saving all changes push the EXIT button followed by the SELECT button EXIT Save Settings Yes No If you press YES SELECT an internal diagnostic checks settings for allowable ranges and if the resultant settings are OK the settings are changed If se...

Page 152: ...ons for this category SELECT SET G IN1 52A1 at end of line shows you are in list function Press or to move through list of entries SET G IN1 52A2 New entry is shown for IN1 While in list function press or to insert or remove NOT function in front of entry SELECT SET G IN2 PT List function is exited new setting for IN1 was saved and next category IN2 is displayed Table 3 20 Set P Command Descriptio...

Page 153: ...CT to enter list mode and select new setting SELECT SET P 1 PARITY N at end of line indicates list mode entered Press or to step through list of PARITY selections SET P 1 PARITY E New PARITY is displayed Press SELECT to save this choice and move to next setting category for Port 1 SELECT SET P 1 STOP 1 Shows present STOP bits setting for this port Press SELECT to enter the list mode and select new...

Page 154: ...isplayed Press SELECT to save this choice and move to next setting category for Port 1 SELECT SET P 1 RTS_CTS N Shows RTS_CTS for Port 1 set to N Press SELECT to enter list mode and select new setting SELECT SET P 1 RTS_CTS N at end of line indicates list mode entered Press 7 or 6 to step through list of RTS_CTS selections SET P 1 RTS_CTS Y New RTS_CTS setting is displayed Press SELECT to save thi...

Page 155: ...BG4 MBG3 MBG2 MBG1 16 XCG4 XCG3 XCG2 XCG1 MCG4 MCG3 MCG2 MCG1 17 MBC4 MBC3 MBC2 MBC1 MAB4 MAB3 MAB2 MAB1 18 SPOC SPOB SPOA MCA4 MCA3 MCA2 MCA1 19 50HH OSTI 50CA 50BC 50AB 20 RBAD CBAD LBOK ROK TOP 21 LP1 SS3 SS2 SS1 EXT DT BT PT 22 EXTUL PARC PARB PARA SPTE PTXFR LP2 LOG 23 LP3 CLOSE 52AC2 52AC1 52AB2 52AB1 52AA2 52AA1 24 LP5 LP4 TCMC2 TCMC1 TCMB2 TCMB1 TCMA2 TCMA1 25 DTA DTB DTC LP6 LP7 LP8 LP9 L...

Page 156: ...44 IN8 IN7 IN6 IN5 IN4 IN3 IN2 IN1 45 RMB8 RMB7 RMB6 RMB5 RMB4 RMB3 RMB2 RMB1 SEL 321 1 Relay Two I O Board Version TAR Status Indicators 40 OUT1 OUT2 OUT3 OUT4 OUT5 OUT6 OUT7 OUT8 41 OUT9 OUT10 OUT11 OUT12 OUT13 OUT14 OUT15 ALARM 42 OUT17 OUT18 OUT19 OUT20 OUT21 OUT22 OUT23 OUT24 43 OUT25 OUT26 OUT27 OUT28 OUT29 OUT30 OUT31 OUT32 44 TMB8 TMB7 TMB6 TMB5 TMB4 TMB3 TMB2 TMB1 45 MIRBRK MIRFRA MIRPAR ...

Page 157: ...cycle standard EVE n L 1 16 cycle standard EVE n R 1 16 cycle unfiltered EVE n C 1 16 cycle SEL 5601 Event Report EVE n U 1 16 cycle unfiltered GROUP Shows setting group to use in lieu of active group HISTORY Shows DATE TIME ZONE TYPE LOCATION distance GROUP and front panel targets for the last 40 events IRIG Force immediate attempt to synchronize internal relay clock to time code input Reports ID...

Page 158: ...ALARM contacts closed momentarily after password entry PAS 1 OTTER sets Level 1 password to OTTER PAS 2 TAIL sets Level 2 password to TAIL SET n Use to enter group settings If n argument omitted edits active group SET G Use to enter new global settings SET L Use SET L n to edit Group n s logic settings Selects active logic group to edit SET P Use SET P n to edit Port n s settings Changes active po...

Page 159: ...ALARM contacts when year entered differs from year stored EVENT Shows event record EVE 1 shows newest event EVE 12 shows oldest Default report is 1 4 cycle standard EVE n L 1 16 cycle standard EVE n R 1 16 cycle unfiltered EVE n C 1 16 cycle SEL 5601 Event Report EVE n U 1 16 cycle unfiltered GROUP Shows setting group to use in lieu of active group HISTORY Shows DATE TIME ZONE TYPE LOCATION distan...

Page 160: ...R Disables MIRRORED BITS loop back mode PASSWORD Shows or sets passwords Command pulses ALARM contacts closed momentarily after password entry PAS 1 OTTER sets Level 1 password to OTTER PAS 2 TAIL sets Level 2 password to TAIL PULSE n t Closes an output contact for testing and control purposes SEL 321 1 only RDMEM m Use to download contents of selected memory areas m RAM EEPROM or ALL SET n Use to...

Page 161: ...isplay Event Report 4 4 Interpretation of Quarter Cycle Voltage and Current Data 4 4 Relay Element Columns Data 4 5 Contact Inputs And Outputs Columns 4 7 Example Event Reports 4 8 Example Event Report 1 4 8 Example Event Report 2 4 10 Example Event Report 2 continued 4 11 Firmware Identification 4 12 TABLES Table 4 1 Event Report Triggering Actions 4 1 Table 4 2 Event Report Fault Type and Fault ...

Page 162: ......

Page 163: ...T command in Section 3 Communications for more details Table 4 1 Event Report Triggering Actions Any tripping element assertions TPA TPB TPC or 3PT TRIGGER command execution Assertion of any element in the MER mask for event report trigger logic variable External Trigger input assertions For event reports triggered by TPA TPB TPC or 3PT assertion the TYPE designation is appended with a T This make...

Page 164: ... independent of the state of MER The relay triggers a second report for the same event if TPA TPB TPC or 3PT asserts Thus the relay records the beginning and end of each event A second event report is not provided however if TPA TPB TPC or 3PT first assert at or less than seven cycles after the first report is triggered Event report triggering and time stamping is referenced to the 16th quarter cy...

Page 165: ...er is removed DEFAULT EVENT REPORT Generate the default event report using the EVENT x command with no format specifier These reports default to 11 cycle duration four samples cycle and resemble the reports from the SEL 100 200 series relays Each report contains voltages currents factory selected relay elements inputs and outputs These reports support analysis of most relay operations The default ...

Page 166: ...ll inputs outputs and relay elements are shown in the computer event report UNFILTERED EVENT REPORT Generate the unfiltered event report using the EVENT x U command These reports are identical to the EVE C event report except that the analog data are not digitally filtered Use the unfiltered event report in computer analysis of data MIRRORED BITS DISPLAY EVENT REPORT Generate an event report where...

Page 167: ... This coincides with a 90 lead of the cosine function over the sine function To construct a phasor diagram of voltages and currents select a pair of adjacent rows from an area of interest in the quarter cycle event report On Cartesian coordinates plot the lower row newer data as the X components and the upper row older data as the Y components Rotate the completed diagram to any angle of reference...

Page 168: ... XAG1 MAG1 set 2 If Zone 2 AG element XAG2 MAG2 set not ZAG1 3 If Zone 3 AG element XAG3 MAG3 set not ZAG1 ZAG2 4 If Zone 4 AG element XAG4 MAG4 set not ZAG1 ZAG2 ZAG3 ZBG If no BG mho or quadrilateral ground distance element asserted 1 If Zone 1 BG element XBG1 MBG1 set 2 If Zone 2 BG element XBG2 MBG2 set not ZBG1 3 If Zone 3 BG element XBG3 MBG3 set not ZBG1 ZBG2 4 If Zone 4 BG element XBG4 MBG...

Page 169: ...lumns headed Outputs and Inputs show the states of the first eight outputs and the first eight inputs These are either the physical outputs and inputs or the mirrored bit outputs and inputs The EVE 1 L M shows the long form of the event report with TMB1 TMB8 and RMB1 RMB8 occupying the last columns of the event report Since there are only four columns under each heading the outputs and inputs are ...

Page 170: ...put 7 and Input 8 EXAMPLE EVENT REPORTS Example Event Report 1 Example BUS B BREAKER 3 Date 04 11 00 Time 08 54 29 577 FID SEL 321 1 R424 V656112 Z001001 D20000410 CURRENTS pri VOLTAGES kV pri RELAY ELEMENTS OUT IN ZZZZZZO 555566L 1357 1357 ABCABCO 31110770 IR IA IB IC VA VB VC BCAGGGS 2NQPPNQP 2468 2468 4 447 320 123 129 3 89 1 40 7 2 112 328 438 27 8 98 5 125 8 3 447 320 124 129 3 89 1 40 7 1 11...

Page 171: ...Date Code 20011026 Event Reporting 4 9 SEL 321 321 1 Instruction Manual ...

Page 172: ...1 460 15 321 124 78 3 110 5 61 6 1 Qpp H B4 1 3904 4016 327 439 14 7 92 0 132 3 1 Qpp H B4 1 459 16 320 123 78 3 110 4 61 6 1 Qpp H B4 1 3907 4017 328 438 14 8 92 0 132 3 1 Qpp H B4 1 126 479 206 147 80 1 108 5 46 7 1 Qpp H B4 1 2555 2610 228 283 35 0 82 3 129 8 1 Qpp H B4 1 359 489 45 85 98 0 111 4 15 1 1 Qpp H B4 1 604 602 65 63 61 5 69 0 130 1 1 Qpp M B4 0 1 1 0 114 2 116 3 1 5 Qpp M B 2 1 1 0 ...

Page 173: ... E50N N E51Q Y 51QP 2 20 51QC U3 51QTD 2 00 51QRS N 51QTC 32QF E50Q N EVOLT N Z2PD 20 00 Z3PD 0 00 Z2GD 20 00 Z3GD 0 00 EPOTT Y Z3RBD 5 00 EBLKD 10 00 ETDPU 2 00 EDURD 4 00 EDCUB N EZ1EXT N EREJO N ESOTF Y ENCLO Y CLOEND 10 00 EN52A N SOTFD 30 00 50H 11 25 ELOP Y LOPD 3 00 50M 2 37 59QL 14 00 59PL 14 00 EPOLD N ESPT N ESPO N 3POD 1 50 ESTUB Y 50MFD 20 00 TULO 3 TDURD 9 00 TOPD 0 00 TXPU 0 00 TXDO ...

Page 174: ...rpreted as follows V VS V ABCDEFG Option Specifier Specifier Meaning Option Description A 5 6 50 Hz 60 Hz Power System Frequency B 1 5 1 A 5 A Nominal A per Phase C 6 67 volts Nominal Volts per Phase D 1 Standard 300 Front Panel Type E 1 2 1 bank 2 banks Number of Banks of Digital Inputs F 2 4 2 banks 4 banks Number of Banks of Contact Outputs G p n abc acb Phase Rotation Sequence Please contact S...

Page 175: ... Zone 3 Setting 5 7 Distance Element Setting Calculations 5 8 Zero Sequence Compensation Factor and Non homogeneous Angle Settings 5 9 Zero Sequence Compensation Factor Setting 5 9 Non homogeneous Angle Setting 5 9 Out of Step Setting 5 10 Load Encroachment Logic Setting 5 10 Negative Sequence Directional Element Settings 5 11 Phase Time Overcurrent Element Setting 5 13 Residual Overcurrent Settin...

Page 176: ...dition Logic 5 25 Output Contact Logic 5 25 Global Input Settings 5 26 Miscellaneous Global Settings 5 26 Settings Sheet for SEL 321 Relay Setting Example 5 26 Event Report Trigger Condition Logic 5 34 Output Contact Logic 5 34 Serial Port Settings See Appendix G for LMD and Appendix H for MIRRORED BITS 5 36 TABLES Table 5 1 System Data for 230 kV Setting Example 5 2 FIGURES Figure 5 1 230 kV Sett...

Page 177: ... for a 5 A nominal relay This example shows the steps for setting the relay at Breaker 3 to protect Line 2 in Figure 5 1 between Buses B and C The basic criteria for protecting this line appear below The communications scheme is Permissive Overreaching Transfer Trip Zone 2 serves as time step backup Current reversals may occur at the Breaker 3 location The maximum expected load is less than 450 A ...

Page 178: ...00 1 Relay Settings Fault voltages and currents in this example are derived from a fault study of the system in Figure 5 1 Values entered during the actual setting procedure appear in bold immediately after the prompt in the dashed boxes A list of all possible relay settings appears in the settings sheet at the end of this section Use the settings sheet as a worksheet and record for settings Relay...

Page 179: ...REAKER 3 Z1MAG 7 80 7 80 7 80 7 80 Z1ANG 83 97 83 97 83 97 83 97 Z0MAG 24 79 24 79 24 79 24 79 Z0ANG 81 46 81 46 81 46 81 46 LOCAT Y Y Y Y LL 100 00 100 00 100 00 100 00 CTR 200 0 200 0 200 0 200 0 PTR 2000 0 2000 0 2000 0 2000 0 Other Settings Affected Values entered for Z1MAG Z1ANG Z0MAG Z0ANG and LL are used in the fault locator calculations Z1ANG also sets the maximum torque angle for the phas...

Page 180: ...hing Zone 2 elements While the percent error of the impedance element reach is less than 5 errors in the CT and PT ratios modeled transmission line data and fault study data do not permit Zone 1 element settings of 100 In this example the Zone 1 distance elements at Breaker 3 must not reach past Bus C To prevent overreaching due to the sources of error listed above the required reach for the Zone ...

Page 181: ...een at Breaker 3 for faults on Lines 3 and 6 The Zone 2 quadrilateral element setting is based upon the same requirement established for the Zone 2 mho elements The reactive reach is set the same as the mho distance setting The resistive reach determines sensitivity for high resistance faults on a radial basis For this example the Zone 2 resistive reach is set for 50 Ω primary Zone 3 Setting This ...

Page 182: ...ultiplied by the square root of three to determine the phase to phase current magnitude Phase to phase currents for phase to phase faults can be derived directly from a fault study In either case the lowest current magnitude must be used for the fault detector Zone 1 Setting For the relay at Breaker 3 the governing fault condition for the Zone 1 element is a phase to phase fault at Bus C with Line...

Page 183: ...or the 50G1 setting is 180 A approximately 60 of the minimum fault current Zone 2 Setting The minimum fault condition for the Zone 2 element is a phase to ground fault at Bus D with Line 1 or 4 removed from service The fault study shows that for this fault IA 306 A primary and IR 202 A primary To ensure that the 50L2 and 50G2 elements pick up for the calculated fault current select some current va...

Page 184: ...Calculations CTR 200 1 50PP1 secondary Ω 510 200 2 55 A primary A secondary All supervisory overcurrent element secondary settings are calculated in the same manner Z1P 6 24 6 24 6 24 6 24 Z2P 9 36 9 36 9 36 9 36 Z3P 1 87 1 87 1 87 1 87 50PP1 2 55 2 55 2 55 2 55 50PP2 2 22 2 22 2 22 2 22 50PP3 2 45 2 45 2 45 2 45 Z1MG 6 24 6 24 6 24 6 24 Z2MG 9 36 9 36 9 36 9 36 Z3MG 1 87 1 87 1 87 1 87 XG1 6 24 6...

Page 185: ...e angles This angle setting compensates the reactance characteristic of the quadrilateral element to improve the element accuracy To determine a setting for T run single phase to ground faults where potential overreach may be a concern These locations are typically at the end of the Zone 1 quadrilateral reach or at the remote bus Compare the total zero sequence fault current angle at the fault loc...

Page 186: ...ons Defined angle settings determine the load sector in the forward and reverse direction The load encroachment setting should be based upon maximum load flow conditions on the protected line The maximum short time load flow could be as high as 900 A with Line 5 removed The maximum conductor current rating is 1200 amps Assuming a 20 short time overload factor set the load impedance for 1440 A load...

Page 187: ...source for reverse faults is with Line 5 removed from service The negative sequence impedance is calculated by applying a phase to ground fault at Bus B Determine the total negative sequence current contribution from the protected line and the negative sequence voltage at Bus B The negative sequence directional element forward Z2F and reverse Z2R impedance settings are calculated from the Z2F and ...

Page 188: ... 286 200 143 amps secondary From above Z R V R I R 2 2 2 14 5 143 1013 Ω secondary Summing the magnitudes of the forward and reverse calculated Z2 as follows 1013 391 14 04 Ω Ω Ω Divide the Z2F and Z2R plane into three sectors 14 04 3 4 68 Ω Ω Setting for Z2F 391 4 68 077 Ω Ω Ω Setting for Z2R 1013 4 68 545 Ω Ω Ω For our example 50QF 50QR 0 5 A 3I2 The maximum load on Line 2 is 450 amps For the ne...

Page 189: ...ine and provides backup protection for remote terminals Because the measure of residual current varies with system switching configuration fault location and fault resistance a complete fault study is necessary to determine the minimum pickup setting appropriate time dial and curve characteristic When the element is directionally controlled consider only faults in front of the line terminal for co...

Page 190: ...controlled consider only faults in front of the line terminal for coordinating purposes The negative sequence overcurrent element can provide backup for phase to phase or phase to ground faults For this example the negative sequence element provides backup for phase to phase faults Phase to ground faults need only be considered for coordination purposes For the relay at Breaker 3 a phase to phase ...

Page 191: ... for the Zone 2 3 and 4 phase and ground distance elements Timers are provided for all four levels of the residual and negative sequence overcurrent elements The residual and negative sequence overcurrent time delays are independently set For our example three zones of phase and ground distance elements are selected In this case the Zone 2 and 3 phase and ground distance time delays must be set Zo...

Page 192: ...reaker opens to permit sequen tial tripping of the weak infeed terminal line breaker If currents do not redistribute sufficiently to operate the protective elements at the weak infeed terminal it is still desirable to open the local breaker This prevents the low level currents from maintaining the fault arc and allows successful auto reclosure from the strong terminal When the fault location is ne...

Page 193: ... Pickup ETDPU timer specifies the time a permissive trip signal must be present The ETDPU setting depends upon your communications equipment but a typical setting for this timer is approximately 2 cycles The Echo Duration Time Delay EDURD limits the duration of the echoed permissive signal Once the echo signal is initiated it should be maintained for a minimum period The echo signal should be cut ...

Page 194: ...ntended for use as a high set non directional phase overcurrent detector in the Switch Onto Fault logic If a line breaker is closed into a close in three phase bolted fault where line side potential transformers are used polarizing voltage for the three phase distance elements is never established In this situation the distance elements do not operate In this instance the 50H element is provided t...

Page 195: ...25 11 25 11 25 Relay Elements and Other Settings Affected 50H element Loss of Potential LOP Enable Setting ELOP Fuses or molded case circuit breakers often protect the secondary windings of the power system potential transformers An operation of one or more fuses or molded case circuit breakers results in a loss of polarizing potential inputs to the relay Loss of one or more phase voltage prevents...

Page 196: ...ical 0 when V1 returns above 50 V secondary and V0 is less than 5 V secondary Note that ILOP disables all distance elements The loss of potential enable setting ELOP selects between original and advanced LOP logic It also routes the LOP Relay Word bit to directional logic Setting ELOP operates as follows N1 Relay sets LOP element when LOP condition is detected using advanced LOP logic Distance and...

Page 197: ...exist for the LOPD time delay for the LOP element to set For three blown PT fuses the relay declares an LOP condition when the measured positive sequence voltage is below the 59PL and the low set phase overcurrent detector 50M is not picked up You determine how the relay uses loss of potential detection by selecting the ELOP setting The ELOP setting choices and their associated results are N Relay...

Page 198: ...ker is closed the ground distance elements are blocked for 3POD time The 3POD dropout time delay should be set for the worst case pole scatter upon breaker closure For our application a setting of 1 5 cycles is required In applications where a portion of the bus or stub of the bus is energized by a closed breaker yet the line is deenergized and isolated by an open disconnect switch the relay provi...

Page 199: ... trip duration trip during open pole and instantaneous trip time declaration timers are also included in these settings The minimum Trip Duration timer TDURD setting determines the minimum length of time the TPA TPB TPC and 3PT relay element asserts These relay elements are used to control a designated trip contact The trip output contacts close for the greater of the TDURD time or the duration of...

Page 200: ...dedicated timers for special applications and assign these combinations to output contacts Logic Variable Equations Five programmable logic variables are provided which allow you to design your own internal logic conditions For our example these variables are not required Tripping Logic Equations There are three logic equations that must be set for tripping The MTCS logic equation determines which...

Page 201: ...ciation sequence of events recording or SCADA indication These requirements are dictated by your particular relay application V NA NA NA NA W NA NA NA NA X NA NA NA NA Y NA NA NA NA Z NA NA NA NA MTCS M2P Z2G M2P Z2G M2P Z2G M2P Z2G MTU M1P Z1G M2PT Z2GT 51NT 51QT 50MF M1P Z1G M2PT Z2GT 51NT 51QT 50MF M1P Z1G M2PT Z2GT 51NT 51QT 50MF M1P Z1G M2PT Z2GT 51NT 51QT 50MF MTO M1P M2P Z1G Z2G 50H M1P M2P...

Page 202: ... is reset to the default display The front panel access level reverts to Access Level 1 The back lighting for the LCD is turned off Any routine that is being executed via a front panel command is interrupted Target LEDs revert to the default targets The factory default setting is five minutes The setting range is from 0 to 30 minutes The group switching delay defines a time interval in which the r...

Page 203: ...tial Transformer Ratio 1 10000 PTR 2000 Enable Zones of Distance Settings Number Distance Zones Mho Phase N 1 2 3 4 PMHOZ 3 Mho Ground N 1 2 3 4 GMHOZ 3 Quad Ground N 1 2 3 4 QUADZ 3 Distance Zones and Overcurrent Levels Direction Settings Distance Zone 1 Overcurrent Level 1 Direction F R DIR1 F Distance Zone 2 Overcurrent Level 2 Direction F R DIR2 F Distance Zone 3 Overcurrent Level 3 Direction ...

Page 204: ...one 3 0 05 50 Ω sec RG3 6 00 Zone 4 0 05 50 Ω sec RG4 Ground Distance Overcurrent Supervision Settings Phase Overcurrent Supervision Zone 1 0 5 100 amps sec 50L1 0 90 Zone 2 0 5 100 amps sec 50L2 0 90 Zone 3 0 5 100 amps sec 50L3 1 30 Zone 4 0 5 100 amps sec 50L4 Residual Overcurrent Supervision Zone 1 0 5 100 amps sec 50G1 0 90 Zone 2 0 5 100 amps sec 50G2 0 60 Zone 3 0 5 100 amps sec 50G3 0 50 Z...

Page 205: ...6 Ω sec X1T6 Bottom 0 to 96 Ω sec X1B6 Zone 6 Resistive Reach Right 0 to 70 Ω sec R1R6 Left 0 to 70 Ω sec R1L6 Zone 6 Positive Sequence Overcurrent Supervision 1 100 amps sec I1 50ABC Load Encroachment Settings Enable Load Encroachment Y N ELE Y Load Impedance Forward 0 05 64 Ω sec ZLF 9 22 Reverse 0 05 64 Ω sec ZLR 9 22 Load Angle Positive Forward 90 to 90 PLAF 30 Negative Forward 90 to 90 NLAF 3...

Page 206: ...e Control 32QF 32QR Z2G N 51NTC 32QF Residual Overcurrent Element Settings Enable Number of Residual Instantaneous Overcurrent Levels N 1 2 3 4 E50N N Residual Inst Overcurrent Pickup Level 1 0 25 80 amps sec 3I0 50N1 Level 2 0 25 80 amps sec 3I0 50N2 Level 3 0 25 80 amps sec 3I0 50N3 Level 4 0 25 80 amps sec 3I0 50N4 Negative Sequence Time Overcurrent Element Settings Negative Sequence Time Overc...

Page 207: ...es Z3GD 0 00 Zone 4 Ground Time Delay TDPU 0 2000 cycles Z4GD Level 1 Residual Time Delay TDPU 0 2000 cycles 67NL1D Level 2 Residual Long Time Delay TDPU 0 2000 cycles 67NL2D Level 3 Residual Time Delay TDPU 0 2000 cycles 67NL3D Level 4 Residual Time Delay TDPU 0 2000 cycles 67NL4D Level 1 Negative Sequence Time Delay TDPU 0 2000 cycles 67QL1D Level 2 Negative Sequence Long Time Delay TDPU 0 2000 ...

Page 208: ...XT N Enable Time Delay TDPU 0 2000 cycles Z1EXTD Multiplier 1 5 unitless Z1EXTM Remote End Just Opened Settings Enable Y N EREJO N Pickup Time Delay TDPU 0 2000 cycles REJOD Overcurrent Element Pickup 0 5 100 amps sec 3P50R Switch Onto Fault Settings Enable Y N ESOTF Y Enable Close Logic Y N ENCLO Y Close Enable Time Delay TDPU 0 8000 cycles CLOEND 10 00 Enable 52A Logic Y N EN52A N 52A Enable Tim...

Page 209: ...ption N 1 2 3 4 TULO 3 Miscellaneous Timers Minimum Trip Duration Time Delay TDDO 0 2000 cycles TDURD 9 00 Trip During Open Pole Time Delay TDDO 0 8000 cycles TOPD 0 00 Relay Element X Time Delay Pickup TDPU 0 8000 cycles TXPU 0 00 Relay Element X Time Delay Dropout TDDO 0 8000 cycles TXDO 0 00 Relay Element Y Time Delay Pickup TDPU 0 8000 cycles TYPU 0 00 Relay Element Y Time Delay Dropout TDDO 0...

Page 210: ... FOR THE SEL 321 321 1 RELAY Date 5 A NOMINAL RELAY Event Report Trigger Condition Logic MER M2P Z2G 51NP 51QP 50H LOP 52AA1 Output Contact Logic OUT1 3PT OUT2 3PT OUT3 CC OUT4 KEY OUT5 NA OUT6 NA OUT7 NA OUT8 NA OUT9 NA OUT10 NA OUT11 NA OUT12 NA OUT13 NA OUT14 NA OUT15 NA OUT17 OUT18 OUT19 OUT20 ...

Page 211: ...ns 5 35 SEL 321 321 1 Instruction Manual SETTINGS SHEET Page 9 OF 10 FOR THE SEL 321 321 1 RELAY Date 5 A NOMINAL RELAY OUT21 OUT22 OUT23 OUT24 OUT25 OUT26 OUT27 OUT28 OUT29 OUT30 OUT31 OUT32 TMB1 TMB2 TMB3 TMB4 TMB5 TMB6 TMB7 TMB8 ...

Page 212: ... Contact 16 Assignment IN16 Received MIRRORED BIT 1 RMB1 Received MIRRORED BIT 2 RMB2 Received MIRRORED BIT 3 RMB3 Received MIRRORED BIT 4 RMB4 Received MIRRORED BIT 5 RMB5 Received MIRRORED BIT 6 RMB6 Received MIRRORED BIT 7 RMB7 Received MIRRORED BIT 8 RMB8 INPUT9 INPUT16 available only on two I O board relays OUT17 OUT32 available only on two I O board relays Miscellaneous Global Settings Front...

Page 213: ...r Ratio 1 10000 PTR _________ Enable Zones of Distance Settings Number Distance Zones Mho Phase N 1 2 3 4 PMHOZ _________ Mho Ground N 1 2 3 4 GMHOZ _________ Quad Ground N 1 2 3 4 QUADZ _________ Distance Zones and Overcurrent Levels Direction Settings Distance Zone 1 Overcurrent Level 1 Direction F R DIR1 _________ Distance Zone 2 Overcurrent Level 2 Direction F R DIR2 _________ Distance Zone 3 ...

Page 214: ...0 05 50 Ω sec RG4 _________ Ground Distance Overcurrent Supervision Settings Phase Overcurrent Supervision Zone 1 0 5 100 amps sec 50L1 _________ Zone 2 0 5 100 amps sec 50L2 _________ Zone 3 0 5 100 amps sec 50L3 _________ Zone 4 0 5 100 amps sec 50L4 _________ Residual Overcurrent Supervision Zone 1 0 5 100 amps sec 50G1 _________ Zone 2 0 5 100 amps sec 50G2 _________ Zone 3 0 5 100 amps sec 50...

Page 215: ...ervision 1 100 amps sec I1 50ABC _________ Load Encroachment Settings Enable Load Encroachment Y N ELE _________ Load Impedance Forward 0 05 64 Ω sec ZLF _________ Reverse 0 05 64 Ω sec ZLR _________ Load Angle Positive Forward 90 to 90 PLAF _________ Negative Forward 90 to 90 NLAF _________ Positive Reverse 90 to 270 PLAR _________ Negative Reverse 90 to 270 NLAR _________ Negative Sequence Direc...

Page 216: ...ps sec 3I0 50N1 _________ Level 2 0 25 80 amps sec 3I0 50N2 _________ Level 3 0 25 80 amps sec 3I0 50N3 _________ Level 4 0 25 80 amps sec 3I0 50N4 _________ Negative Sequence Time Overcurrent Element Settings Negative Sequence Time Overcurrent Enable Y N S E51Q _________ Pickup 0 5 16 amps sec 3I2 51QP _________ Curve Family U1 U2 U3 U4 C1 C2 C3 C4 51QC _________ Time Dial US 0 5 15 IEC 0 05 1 51...

Page 217: ...000 cycles Z4GD _________ Level 1 Residual Time Delay TDPU 0 2000 cycles 67NL1D _________ Level 2 Residual Long Time Delay TDPU 0 2000 cycles 67NL2D _________ Level 3 Residual Time Delay TDPU 0 2000 cycles 67NL3D _________ Level 4 Residual Time Delay TDPU 0 2000 cycles 67NL4D _________ Level 1 Negative Sequence Time Delay TDPU 0 2000 cycles 67QL1D _________ Level 2 Negative Sequence Long Time Dela...

Page 218: ... _________ Multiplier 1 5 unitless Z1EXTM _________ Remote End Just Opened Settings Enable Y N EREJO _________ Pickup Time Delay TDPU 0 2000 cycles REJOD _________ Overcurrent Element Pickup 0 5 100 amps sec 3P50R _________ Switch Onto Fault Settings Enable Y N ESOTF _________ Enable Close Logic Y N ENCLO _________ Close Enable Time Delay TDPU 0 8000 cycles CLOEND _________ Enable 52A Logic Y N EN...

Page 219: ...cycles TZDO _________ Instantaneous Trip Time Declaration Delay TDPU 0 60 cycles ITTD _________ Logic Variables LOGIC V _________________________________________________________________________ _________________________________________________________________________ LOGIC W _________________________________________________________________________ __________________________________________________...

Page 220: ...______________________ _________________________________________________________________________ OUT10 _________________________________________________________________________ _________________________________________________________________________ OUT11 _________________________________________________________________________ _____________________________________________________________________...

Page 221: ...__ _________________________________________________________________________ OUT31 _________________________________________________________________________ _________________________________________________________________________ OUT32 _________________________________________________________________________ _________________________________________________________________________ TMB1 __________...

Page 222: ...IT 1 RMB1 _________ Received MIRRORED BIT 2 RMB2 _________ Received MIRRORED BIT 3 RMB3 _________ Received MIRRORED BIT 4 RMB4 _________ Received MIRRORED BIT 5 RMB5 _________ Received MIRRORED BIT 6 RMB6 _________ Received MIRRORED BIT 7 RMB7 _________ Received MIRRORED BIT 8 RMB8 _________ INPUT9 INPUT16 available only on two I O board relays OUT17 OUT32 available only on two I O board relays Mi...

Page 223: ...atio 1 10000 PTR _________ Enable Zones of Distance Settings Number Distance Zones Mho Phase N 1 2 3 4 PMHOZ _________ Mho Ground N 1 2 3 4 GMHOZ _________ Quad Ground N 1 2 3 4 QUADZ _________ Distance Zones and Overcurrent Levels Direction Settings Distance Zone 1 Overcurrent Level 1 Direction F R DIR1 _________ Distance Zone 2 Overcurrent Level 2 Direction F R DIR2 _________ Distance Zone 3 Ove...

Page 224: ..._ Zone 4 0 25 250 Ω sec RG4 _________ Ground Distance Overcurrent Supervision Settings Phase Overcurrent Supervision Zone 1 0 1 20 amps sec 50L1 _________ Zone 2 0 1 20 amps sec 50L2 _________ Zone 3 0 1 20 amps sec 50L3 _________ Zone 4 0 1 20 amps sec 50L4 _________ Residual Overcurrent Supervision Zone 1 0 1 20 amps sec 50G1 _________ Zone 2 0 1 20 amps sec 50G2 _________ Zone 3 0 1 20 amps sec...

Page 225: ...om 0 to 480 Ω sec X1B6 _________ Zone 6 Resistive Reach Right 0 to 350 Ω sec R1R6 _________ Left 0 to 350 Ω sec R1L6 _________ Zone 6 Positive Sequence Overcurrent Supervision 0 2 20 amps sec I1 50ABC _________ Load Encroachment Settings Enable Load Encroachment Y N ELE _________ Load Impedance Forward 0 25 320 Ω sec ZLF _________ Reverse 0 25 320 Ω sec ZLR _________ Load Angle Positive Forward 90...

Page 226: ...l Overcurrent Element Settings Enable Number of Residual Instantaneous Overcurrent Levels N 1 2 3 4 E50N _________ Residual Inst Overcurrent Pickup Level 1 0 05 16 amps sec 3I0 50N1 _________ Level 2 0 05 16 amps sec 3I0 50N2 _________ Level 3 0 05 16 amps sec 3I0 50N3 _________ Level 4 0 05 16 amps sec 3I0 50N4 _________ Negative Sequence Time Overcurrent Element Settings Negative Sequence Time O...

Page 227: ...000 cycles Z4GD _________ Level 1 Residual Time Delay TDPU 0 2000 cycles 67NL1D _________ Level 2 Residual Long Time Delay TDPU 0 2000 cycles 67NL2D _________ Level 3 Residual Time Delay TDPU 0 2000 cycles 67NL3D _________ Level 4 Residual Time Delay TDPU 0 2000 cycles 67NL4D _________ Level 1 Negative Sequence Time Delay TDPU 0 2000 cycles 67QL1D _________ Level 2 Negative Sequence Long Time Dela...

Page 228: ...TD _________ Multiplier 1 5 unitless Z1EXTM _________ Remote End Just Opened Settings Enable Y N EREJO _________ Pickup Time Delay TDPU 0 2000 cycles REJOD _________ Overcurrent Element Pickup 0 1 20 amps sec 3P50R _________ Switch Onto Fault Settings Enable Y N ESOTF _________ Enable Close Logic Y N ENCLO _________ Close Enable Time Delay TDPU 0 8000 cycles CLOEND _________ Enable 52A Logic Y N E...

Page 229: ...cycles TZDO _________ Instantaneous Trip Time Declaration Delay TDPU 0 60 cycles ITTD _________ Logic Variables LOGIC V _________________________________________________________________________ _________________________________________________________________________ LOGIC W _________________________________________________________________________ __________________________________________________...

Page 230: ...______________________ _________________________________________________________________________ OUT10 _________________________________________________________________________ _________________________________________________________________________ OUT11 _________________________________________________________________________ _____________________________________________________________________...

Page 231: ...__ _________________________________________________________________________ OUT31 _________________________________________________________________________ _________________________________________________________________________ OUT32 _________________________________________________________________________ _________________________________________________________________________ TMB1 __________...

Page 232: ...IT 1 RMB1 _________ Received MIRRORED BIT 2 RMB2 _________ Received MIRRORED BIT 3 RMB3 _________ Received MIRRORED BIT 4 RMB4 _________ Received MIRRORED BIT 5 RMB5 _________ Received MIRRORED BIT 6 RMB6 _________ Received MIRRORED BIT 7 RMB7 _________ Received MIRRORED BIT 8 RMB8 _________ INPUT9 INPUT16 available only on two I O board relays OUT17 OUT32 available only on two I O board relays Mi...

Page 233: ...arm Contact Connection 6 4 IRIG B Input Connection 6 5 Communication Circuit Connections 6 5 Communication Cables 6 6 EIA 232 Cables 6 7 Communications 6 8 Modems 6 8 Telephone Line Communications 6 9 Data Flow Control 6 9 Baud Rate 6 9 Passwords 6 9 Jumper Settings 6 10 Main Board Jumpers 6 10 Input Output Connections 6 10 Configure the Output Contact Form 6 10 Open the SEL 321 Relay to Access In...

Page 234: ...erminals per board shown other options are available 6 19 Figure 6 9 SEL 321 Relay Vertical Front and Rear Panel Drawings Two I O Board Conventional Terminal Block Version 16 outputs with shared return terminals per board shown other options are available 6 20 Figure 6 10 SEL 321 Relay Horizontal Front and Rear Panel Drawings One I O Board Plug In Connector Version 12 isolated high current interru...

Page 235: ...l LEDs and LCD back light come on when power is applied 4 After a couple of seconds the EN LED should light and EN should be visible in the LCD display The ALARM contact should also operate open Momentarily press the TARGET RESET button and verify that all LEDs operate Note If the LCD display is not readable use a small slotted tip screwdriver to adjust it via the hole near the EN LED 5 Connect a ...

Page 236: ...t channel inputs IA IB and IC has been made more robust This improvement makes the new connector design incompatible with the old design Thus presently constructed connectorized SEL 321 Relays with this improved connector have a new part number partial part numbers shown Old New 321xK 321xZ 321xJ 321xY The respective wiring harness part numbers for these old and new connectorized SEL 321 Relays ar...

Page 237: ...led POWER on the rear panel must be connected to a power source that matches the power supply PWR SUP characteristics specified on the rear panel nameplate of your SEL 321 Relay Control power passes through these terminals to the fuse s and a toggle switch if installed These terminals are isolated from the chassis ground If you provide a dc power source you must connect the source with the proper ...

Page 238: ...output Note some I O boards share a common connection with adjacent contacts There are no internal connections between control outputs except as noted previously To assign the functions of the control outputs see Trip Logic in Section 2 Specifications and the SET L command in Section 3 Communications for more details To verify operation of the outputs use the PULSE command see Section 3 Communicat...

Page 239: ...e you to synchronize more precisely with devices such as the SEL 2020 capable of sending IRIG B time code even with a fiber optic communication link The actual IRIG B input circuit is a 330 Ω resistor in series with an optocoupler input diode The input diode forward voltage drop is about 1 5 V Driver circuits should put approximately 10 mA through the circuit when on this would be accomplished by ...

Page 240: ...lable Please contact SEL for more information or if you have any questions about cables and cable connections Never use standard null modem cables with the SEL 321 Relay Using any non SEL cable can cause severe power and ground problems on the SEL 321 Relay communication ports The following list provides additional rules and practices you should follow to ensure successful communication using EIA ...

Page 241: ...EL 321 Relay 9 Pin Male D Subconnector DCE Device 25 Pin Male D Subconnector Cable 231 SEL PRTU 9 Pin Male Round Conxall SEL 321 Relay 9 Pin Male D Subconnector RXD 2 TXD 3 GND 5 CTS 8 GND 5 TXD 3 RTS 7 RXD 2 CTS 8 GND 9 GND 1 TXD 2 RXD 4 CTS 5 12 7 GND 9 3 TXD 2 RXD 5 GND 8 CTS 7 RTS 1 DCD 4 DTR 6 DSR 7 GND 2 TXD IN 20 DTR IN 3 RXD OUT 8 CD OUT 1 GND 5 GND 2 RXD 3 TXD 7 RTS 8 CTS 9 GND ...

Page 242: ...nterference is a problem consider using point to point fiber optic modems to provide electrical isolation and noise immunity We recommend the SEL 2800 2810 Fiber Optic Transceivers for these applications The connection between the SEL 321 Relay and the modem is EIA 232 The connection between the remote modem and the remote device is also EIA 232 Optical fibers connect the two modems For sites wher...

Page 243: ...ditions Connect the line protection equipment to the modem following standard commercial telephone wiring standards Data Flow Control All SEL devices including the SEL 321 Relay support XON XOFF software data flow control Set RTS CTS N to connect an SEL 321 Relay to any SEL device See the SET P command in Section 3 Communications for details The SEL 321 Relay also supports RTS CTS hardware data fl...

Page 244: ...d Enable default OPEN CLOSE Command Disable P7 J106 shorting block installed P7 J106 shorting block removed Note Unused spare jumpers may be placed on P7 locations labeled GND P7 J101 through P7 J204 do not provide any function Input Output Connections Your SEL 321 Relay is equipped with one or two input output I O boards Configure the Output Contact Form The SEL 321 Relay I O boards are shipped f...

Page 245: ...ved configure the following jumpers according to the selections you have made Select output contact form A or B Note most boards have a jumper for each output Reassemble the SEL 321 Relay After configuring jumpers reassemble the SEL 321 Relay as follows 1 If you removed an I O board replace it 2 Reconnect any cables that were disconnected between the I O board and the other board s 3 Replace the t...

Page 246: ...ssword prompt You should now have a Level 1 prompt 8 Type STATUS ENTER and verify that a status report appears on your terminal Confirm that IRIG B PORT and I O board connections configurations match your expectations Change the SEL 321 Relay settings as desired required to suit the application as outlined in other sections of this manual and verify that their operation matches your expectations 9...

Page 247: ...13 SEL 321 321 1 Instruction Manual Figure 6 2 SEL 321 Relay Horizontal Front and Rear Panel Drawings One I O Board Conventional Terminal Block Version 8 fast high current interrupting isolated outputs shown other options are available ...

Page 248: ...ate Code 20011026 SEL 321 321 1 Instruction Manual Figure 6 3 SEL 321 Relay Horizontal Front and Rear Panel Drawings One I O Board Conventional Terminal Block Version 12 isolated outputs shown other options are available ...

Page 249: ...L 321 321 1 Instruction Manual Figure 6 4 SEL 321 Relay Horizontal Front and Rear Panel Drawings Two I O Board Conventional Terminal Block Version 8 fast high current interrupting isolated outputs per board shown other options are available ...

Page 250: ...0011026 SEL 321 321 1 Instruction Manual Figure 6 5 SEL 321 Relay Horizontal Front and Rear Panel Drawings One I O Board Conventional Terminal Block Version 16 outputs with shared return terminals shown other options are available ...

Page 251: ...ion 6 17 SEL 321 321 1 Instruction Manual Figure 6 6 SEL 321 Relay Vertical Front and Rear Panel Drawings One I O Board Conventional Terminal Block Version 16 outputs with shared return terminals shown other options are available ...

Page 252: ...ode 20011026 SEL 321 321 1 Instruction Manual Figure 6 7 SEL 321 Relay Horizontal Front and Rear Panel Drawings Two I O Board Conventional Terminal Block Version 12 isolated outputs per board shown other options are available ...

Page 253: ...19 SEL 321 321 1 Instruction Manual Figure 6 8 SEL 321 Relay Horizontal Front and Rear Panel Drawings Two I O Board Conventional Terminal Block Version 16 outputs with shared return terminals per board shown other options are available ...

Page 254: ...026 SEL 321 321 1 Instruction Manual Figure 6 9 SEL 321 Relay Vertical Front and Rear Panel Drawings Two I O Board Conventional Terminal Block Version 16 outputs with shared return terminals per board shown other options are available ...

Page 255: ...tion 6 21 SEL 321 321 1 Instruction Manual Figure 6 10 SEL 321 Relay Horizontal Front and Rear Panel Drawings One I O Board Plug In Connector Version 12 isolated high current interrupting outputs shown other options are available ...

Page 256: ...ode 20011026 SEL 321 321 1 Instruction Manual Figure 6 11 SEL 321 Relay Horizontal Front and Rear Panel Drawings One I O Board Plug In Connector Version 16 outputs with shared return terminals shown other options are available ...

Page 257: ...6 23 SEL 321 321 1 Instruction Manual Figure 6 12 SEL 321 Relay Horizontal Front and Rear Panel Drawings Two I O Board Plug In Connector Version 12 isolated high current interrupting outputs per board shown other options are available ...

Page 258: ...6 24 Installation Date Code 20011026 SEL 321 321 1 Instruction Manual Figure 6 13 Relay Dimensions and Drill Plan One and Two I O Board Versions Conventional Terminal Blocks ...

Page 259: ...Date Code 20011026 Installation 6 25 SEL 321 321 1 Instruction Manual Figure 6 14 Relay Dimensions and Drill Plan One and Two I O Board Versions Plug In Connectors Option ...

Page 260: ...lation Date Code 20011026 SEL 321 321 1 Instruction Manual Figure 6 15 Communications and Clock Connections One Unit at One Location Figure 6 16 Communications and Clock Connections Multiple Units at One Location ...

Page 261: ...struction Manual Figure 6 17 SEL 321 Relay External AC Current and Voltage Connections Figure 6 18 SEL 321 Relay Typical External DC Connection Diagram One I O Board Version 16 outputs with shared return terminals shown other output options are available ...

Page 262: ...e Code 20011026 SEL 321 321 1 Instruction Manual Figure 6 19 SEL 321 Relay External DC Connections to Communications Equipment One I O Board Version 16 outputs with shared return terminals shown other options are available ...

Page 263: ...SEL DIRECTION AND POLARITY CHECK FORM ...

Page 264: ......

Page 265: ...SEL DIRECTION AND POLARITY CHECK FORM ...

Page 266: ......

Page 267: ...urce and Two Current Source Connections 7 14 Three Voltage Source and One Current Source Connections 7 16 Serial Communication Equipment Connections 7 17 Test Procedures 7 17 Overcurrent Elements 7 17 Calculating Overcurrent Element Test Quantities 7 18 Overcurrent Element Test Examples 7 19 Single Phase Overcurrent Element 50H 7 19 Phase to Phase Overcurrent Element 50PP2 7 20 Negative Sequence D...

Page 268: ... Inputs 7 40 Ground Mho Distance Element Test Using Three Voltage Sources and One Current Source 7 40 Ground Quadrilateral Distance Element Reactive Reach Test Using Three Voltage Sources and One Current Source 7 45 Ground Quadrilateral Distance Element Resistive Reach Test Using Three Voltage Sources and One Current Source 7 49 Troubleshooting Test Results 7 54 Relay Troubleshooting 7 55 Inspecti...

Page 269: ...ES Figure 7 1 Relay Part Number and Hardware Identification Sticker 7 2 Figure 7 2 Low Level Test Interface 7 13 Figure 7 3 Three Voltage Source and Three Current Source Test Connections 7 14 Figure 7 4 Phase to Phase Phase to Ground and Two Phase to Ground Fault Test Connections Using Two Current Sources 7 15 Figure 7 5 Three Phase Fault and METER Test Connections Using Two Current Sources 7 15 F...

Page 270: ......

Page 271: ...for a complete understanding of the relay capabilities Equipment Required The following equipment is necessary for initial checkout 1 Source of control power 2 Source of three phase voltages and at least two currents 3 Ohmmeter or contact opening closing sensing device Checkout Procedure Step 1 Purpose Be sure you received the relay in satisfactory condition Method Inspect the instrument for physi...

Page 272: ...ly dc voltage to the relay input terminals Refer to the sticker attached to your relay to determine the magnitude of voltage you should apply to the relay logic inputs Approximately four milliamps of current flow when rated voltage is applied to a relay logic input The Rotation specification indicates the expected power system phase rotation Figure 7 1 indicates that this relay is configured to ac...

Page 273: ...switch to the ON position If you are using a battery simulator as the relay power supply voltage source be sure the simulator voltage level is stabilized before turning the relay on The relay front panel Enable target EN should illuminate EN should appear in the relay LCD screen The relay output labeled ALARM is typically configured as a normally closed form b contact and closes to indicate loss o...

Page 274: ...VAR If you inadvertently switched a pair of voltages or currents the MW reading should be approximately zero It is important to remember this when commissioning the relay using system voltages and currents If you wish to verify the relay voltage and current connections in a more detailed manner use the SEL Direction and Polarity Check Form provided in Section 6 Installation Step 9 Purpose Use the ...

Page 275: ... port You must enter the Breaker Access Level or Access Level 2 to change the active group Press the Down arrow button repeatedly until the upper line of the display reads Misc Scheme Logic Press SELECT Press the Down arrow button repeatedly until the lower line of the display reads TULO 3 Press SELECT Press the Up arrow button until the lower line of the display reads TULO 1 Press SELECT Press EX...

Page 276: ...ne positive sequence impedance see Z1P Z1MG and XG1 in the settings Faults at 85 miles are beyond Zone 1 but within Zone 2 Faults listed in Table 7 1 cause certain combinations of output contacts to close and front panel LEDs to illuminate You may use the front panel LCD functions to examine the short form fault data following each test Table 7 2 shows the expected results Table 7 2 Output Contact...

Page 277: ... an event report for each fault To see the summary event report for the last fault press the FAULT button on the relay front panel and use the Up Down Left and Right arrow buttons to review the information presented there If a new fault occurs while you are reviewing the fault data press the EXIT button then the FAULT button to review the new data You may review the long form event report for each...

Page 278: ... system ac and dc connections are correct b Ensure that the relay functions as intended using your settings c Ensure that all auxiliary equipment operates as intended What to test All connected or monitored inputs and outputs polarity and phase rotation of ac current and voltage connections simple check of protection elements SEL performs a complete functional check and calibration of each relay b...

Page 279: ...nt report input and output data you can determine that the relay is asserting outputs at the correct instants and that auxiliary equipment is operating properly At the end of your maintenance interval the only items that need testing are those that have not operated during the maintenance interval The basis of this testing philosophy is simple If the relay is correctly set and connected is measuri...

Page 280: ...nt results in a TRIP the relay records a second event report Thus the relay may generate two event reports for a long duration fault the first when the instantaneous element asserted the second when the TRIP occurs Where Time Delayed Pickup TDPU timers are concerned the time tag in the event reports may be used to determine the validity of a TDPU timer setting Simply subtract the latest event repo...

Page 281: ...he relay the various elements assert and their names appear in the LCD display screen LEDs corresponding to asserted elements illuminate You may wish to use this function to assist in element pickup tests Testing Via Output Contact Assertion To test via output contact assertion use the SET L command to set one programmable output contact to assert when the element under test picks up As an example...

Page 282: ... interface Access the test interface by removing the relay front panel Figure 7 2 shows the low level interface connections This drawing also appears on the inside of the relay front panel Remove the ribbon cable between the two modules to access the outputs of the input module and the inputs to the processing module relay main board You can test the relay processing module using signals from the ...

Page 283: ...nd or current signals be applied to the relay The figures and text below describe the test source connections required for relay protection element tests Three Voltage Source and Three Current Source Connections Figure 7 3 shows connections to use when three voltage sources and three current sources are available Any protective element may be tested and any fault type simulated using these connect...

Page 284: ...ee Voltage Source and Two Current Source Connections Figure 7 4 and Figure 7 5 show connections to use when three voltage sources and two current sources are available Phase to phase phase ground and two phase ground faults may be simulated using the connections shown in Figure 7 4 Three phase faults may be simulated using the connections shown in Figure 7 5 ...

Page 285: ...ting 7 15 SEL 321 321 1 Instruction Manual Figure 7 4 Phase to Phase Phase to Ground and Two Phase to Ground Fault Test Connections Using Two Current Sources Figure 7 5 Three Phase Fault and METER Test Connections Using Two Current Sources ...

Page 286: ... when three voltage sources and a single current source are available Phase ground faults may be simulated using the connections shown in Figure 7 6 Phase to phase faults may be simulated using the connections shown in Figure 7 7 Figure 7 6 Phase to Ground Fault Test Connections Using a Single Current Source Figure 7 7 Phase to Phase Fault Test Connections Using a Single Current Source ...

Page 287: ...built to SEL specifications with the SEL 321 Relay Damage to the relay or your communication equipment may result from the use of incorrect communication connections Figure 7 8 Communications Connections Between the SEL 321 Relay and a Terminal TEST PROCEDURES This section includes outline test procedures for overcurrent directional phase distance and ground distance elements included in the SEL 3...

Page 288: ...nnections based upon the requirements of the test and the availability of sources Figure 7 3 through Figure 7 7 illustrate the various source connections you may use Step 5 Determine the signals required to operate the element For unsupervised elements simply use the equations shown on the following page Fulfilling the requirements of the supervisory conditions may be more complicated Refer to the...

Page 289: ...ent elements 50G1 50G2 50G3 50G4 50N1 50N2 50N3 50N4 50Q1 50Q2 50Q3 50Q4 50QF and 50QR Step 1 Execute the SHOWSET command and verify the relay setting for the 50H overcurrent element The example relay settings set the 50H element to pick up at 11 25 amps secondary Step 2 Select an output contact to indicate operation of the 50H overcurrent element In this example we use the OUT8 output From Access...

Page 290: ...element setting is not displayed and the element cannot pick up The steps taken in the example test for the 50PP2 overcurrent element may be applied to test the 50PP1 50PP3 and 50PP4 phase to phase overcurrent elements Step 1 Execute the SHOWSET command and verify the relay setting for the 50PP2 overcurrent element The example relay settings set the 50PP2 element to pick up at 2 22 amps secondary ...

Page 291: ... other output contacts and assert relay targets This is normal and is not a cause for concern Negative Sequence Directional Element The SEL 321 Relay includes a directional element that operates based upon the calculated magnitude and angle of negative sequence impedance applied to the relay There are two methods of testing the element The first using a single voltage and current and the second us...

Page 292: ...positive for a reverse fault and negative for a forward fault This result is consistent with actual behavior on the power system The relay determines fault direction by comparing the result of Equation 7 2 to forward and reverse impedance thresholds that are dependent upon the Z2F and Z2R relay settings and the magnitude of negative sequence voltage divided by the magnitude of negative sequence cu...

Page 293: ...ng upon the constraints of the relay application Section 5 Applications of this instruction manual provides guidelines for the selection of Z2F and Z2R settings Negative Sequence Directional Element Supervisory Conditions There are a number of supervisory conditions that must be fulfilled before the relay asserts the 32QF or 32QR elements These supervisory conditions are described below Magnitude ...

Page 294: ...a2 The example relay settings use the following settings Z1MAG 7 8 Ω Z1ANG 83 97 Z2F 0 77 Ω 50QF 0 5 amps secondary Z2R 5 45 Ω 50QR 0 5 amps secondary a2 0 07 Execute the SET command and change the example ELOP setting from Y to N Step 2 Select output contacts to indicate operation of the 32QF and 32QR elements In this example we use the OUT7 and OUT8 outputs From Access Level 2 execute the SET L ...

Page 295: ...olts secondary volts 180 0 6 V volts 180 0 18 V 2 3 1 2 Determine the test angle of A phase current from the Z1ANG relay setting Equation 7 2 yields a positive result when I2 lags V2 by the angle of Z1ANG Equation 7 2 yields a negative result when I2 leads V2 by 180 Z1ANG We are testing for positive values of Z2c so I2 should lag V2 by Z1ANG Assuming that VA 18 0 180 volts the angle of IA for this...

Page 296: ...gnitudes of Z2c and Z2m decrease For magnitudes of IA less than 23 4 amps 32QF should not assert given the other test quantities For IA magnitudes greater than 23 4 amps Z2c applied is less than Z2FT so 32QF asserts Step 5 Turn on the voltage source Apply VA 18 0 V 180 IA 0 0 A 96 Slowly increase the magnitude of IA without varying the phase angle The relay 32QR element asserts closing OUT8 when I...

Page 297: ...y targets This is normal and is not a cause for concern Negative Sequence Directional Element Test Using Three Voltage Sources and One Current Source Step 1 Execute the SHOWSET command and verify the following relay settings Z1MAG Z1ANG Z2F 50QF Z2R 50QR and a2 The example relay settings use the following settings Z1MAG 7 8 Ω Z1ANG 83 97 Z2F 0 77 Ω 50QF 0 5 amps secondary Z2R 5 45 Ω 50QR 0 5 amps ...

Page 298: ... Figure 7 6 Step 4 As described above the relay 32Q element operates based upon the magnitude and angle of negative sequence voltages and currents You can calculate the magnitude and angle of V2 and I2 given the magnitude and angle of each of the phase quantities using the equations below C B 2 A 3 1 2 C B 2 A 3 1 2 I a I a I I V a V a V V Using a single phase current source simplifies the I2 calc...

Page 299: ...hase current where Z2c equals Z2RT or Z2FT using Equation 7 7 2 2 A Z V 3 I Equation 7 7 For Z2R 5 45 Ω amps 3 3 I ohms 45 5 volts 0 6 3 I A A Calculate Z2m ohms 45 5 m 2 Z A 1 1 V 0 6 m 2 Z I V m 2 Z 2 2 Because Z2R is positive use Equation 7 5 to calculate Z2RT ohms 45 5 RT 2 Z 45 5 25 0 45 5 75 0 RT 2 Z m 2 Z 25 0 R 2 Z 75 0 RT 2 Z The 32QR element asserts when Z2c applied is greater than Z2RT ...

Page 300: ... sources Apply 96 A 0 0 I 120 V 0 67 V 120 V 0 67 V 0 V 0 49 V A C B A Slowly increase the magnitude of IA without varying the phase angle The relay 32QR element asserts closing OUT8 when IA 0 5 amps This indicates that Z2c applied is greater than Z2RT 3I2 is greater than 50QR and I2 is greater than a2 I1 where a2 is the relay setting Continue to increase the magnitude of IA 32QR deasserts when IA...

Page 301: ... would like to apply using the PMHOZ setting You may set the phase distance elements to reach in the forward or reverse direction The reach and direction of each zone is independent from the other zones When a zone of phase distance protection is set to reach in one direction the ground distance elements associated with that zone must be set to reach in the same direction Reach is set in secondary...

Page 302: ...ted The relay operates properly for three phase faults where no negative sequence current is present using alternative logic to detect three phase faults Loss of Potential Logic If ELOP Y Y1 or Y2 the relay supervises the phase distance element logic using the Internal Loss of Potential condition ILOP When ELOP Y Y1 or Y2 the relay disables the phase distance elements when a loss of potential is d...

Page 303: ...rent phase angle Verify correct operation of the 32QR element for the test voltage and current signals using Equation 7 2 in the Negative Sequence Directional Element Test Procedure Step 1 Execute the SHOWSET command and verify the following relay settings Z1MAG Z1ANG PMHOZ DIR2 Z2P 50PP2 Z2F and 50QF The example relay settings use the following settings Z1MAG 7 8 Z1ANG 83 97 PMHOZ 3 DIR2 F Z2P 9 ...

Page 304: ...ndix D The relay phase distance elements operate based upon the magnitude of applied phase to phase impedance The impedance calculation is also supervised by the functions described To effectively test the distance elements select voltage and current test signals that fulfill the impedance and supervisory requirements of the relay settings but are within the ability of the voltage and current test...

Page 305: ... setting of 0 5 amps 50QF picks up when ITEST is greater than 0 288 amps In this example select ITEST 2 5 amps thus IBC 5 0 amps and 3I2 4 33 amps This selection fulfills the supervisory overcurrent conditions described above The reach of the distance element under test is defined by the element setting In this case Z2P 9 36 secondary ohms Calculate the magnitude of VBC using Equation 7 8 ondary s...

Page 306: ...ximum torque angle is defined by the angle of the relay Z1ANG setting For the example relay settings IBC should lag VBC by 83 97 Based upon the test voltages selected above VBC lags VA by 90 so IBC should lag VA by 173 97 As stated above the phase distance elements are supervised by the negative sequence directional element It is important to check the negative sequence quantities applied and veri...

Page 307: ... on the voltage sources Apply VA VB and VC at the magnitudes and angles listed in Table 7 3 Turn on the current test source Set the current angle to 174 Slowly increase the magnitude of current applied until the M2P element asserts causing OUT7 to close This should occur when current applied is approximately 2 5 amps With these signals applied the relay measures B C phase impedance defined by the ...

Page 308: ... reach in the same direction Reach is set in secondary ohms The angle of maximum reach of the ground distance elements is defined by the Z1ANG setting and the zero sequence current compensation factor for the zone under test Each zone has an instantaneous indication For example the Z3G element asserts without intentional time delay for A G B G and C G faults within the Zone 3 mho or quadrilateral ...

Page 309: ...dition ILOP When ELOP Y Y1 or Y2 the relay disables the ground distance elements when a loss of potential is detected regardless of other signals applied to the relay If you test the ground distance elements using low voltage signals set ELOP N to simplify the test Single Pole Open Logic In single pole trip applications the relay cannot properly polarize or operate the ground distance elements ass...

Page 310: ...MHOZ DIR2 Z2MG 50L2 50G2 k0M k0A Z2F and 50QF The example relay settings use the following settings Z1MAG 7 8 Z1ANG 83 97 GMHOZ 3 DIR2 F Z2MG 9 36 Ω 50L2 0 90 50G2 0 60 k0M 0 726 k0A 3 69 Z2F 0 77 Ω 50QF 0 5 amps secondary Execute the SET command and change the following settings Change QUADZ to N and ELOP from Y to N Changing the QUADZ setting prevents the relay ground quadrilateral distance elem...

Page 311: ...o effectively test the distance elements select test signals that fulfill the impedance and supervisory requirements of the relay but are within the ability of the test sources to produce accurately The Zone 2 ground distance element is forward reaching in the example relay settings Thus it is supervised by the forward directional element 32QF as well as the 50L2 and 50G2 phase and residual overcu...

Page 312: ...quence current compensation factor for Zone 1 ground distance elements The k0M and k0A settings to define k0 for the remaining zones The impedance measured by the relay ground mho distance element for a Zone 2 fault is defined by the following equation R A A AG I 0 k I V Z Equation 7 12 Where k0 k0M k0A For a fault on a radial system and when testing a ground distance element using a single curren...

Page 313: ... by the negative sequence directional element It is important to check the negative sequence quantities applied and verify that the 32QF element should assert allowing the forward reaching distance element to operate Calculate the magnitude and angle of negative sequence voltage and current applied for the test quantities listed above Then calculate the negative sequence impedance Z2c applied usin...

Page 314: ...current angle to 82 Slowly increase the magnitude of current applied until the Z2G element asserts causing OUT7 to close This occurs when current applied is approximately 2 5 amps You may wish to test the distance element characteristic at impedance angles other than the line positive sequence impedance angle To do this you must adjust the magnitude and angle of ITEST from the values shown in Tabl...

Page 315: ... 50L2 50G2 k0M k0A T Z2F and 50QF The example relay settings use the following settings Z1MAG 7 8 Ω Z1ANG 83 97 QUADZ 3 DIR2 F XG2 9 36 Ω RG2 5 00 Ω 50L2 0 90 50G2 0 60 k0M 0 726 k0A 3 69 T 0 00 Z2F 0 77 50QF 0 5 amps secondary Execute the SET command and change the following settings Change GMHOZ to N QUADZ to 3 XG1 6 24 XG2 9 36 XG3 1 87 RG1 2 5 RG2 5 0 and RG3 6 0 Changing the GMHOZ setting pre...

Page 316: ...e calculation is supervised by the functions described To effectively test the distance elements select test signals that fulfill the impedance and supervisory requirements of the relay but are within the ability of the test sources to produce accurately The reactive reach of the quadrilateral distance element under test is defined by the XG2 element setting In this case XG2 9 36 secondary ohms Th...

Page 317: ...m I 90 I 0 0 40 Im 36 9 2 A A The result of computing the imaginary portion of VA IA when IA lags VA by 90 is A A A A I V 90 I 0 V Im Substituting this into the equation above yields 71 1 I I 0 40 36 9 2 A A Solving for the magnitude of IA yields amps 49 2 I 71 1 39 9 0 40 I A A The Zone 2 ground distance element is forward reaching in the example relay settings Thus it is supervised by the forwar...

Page 318: ...tting of 0 5 amps 50QF picks up when ITEST is greater than 0 5 amps We calculated IA ITEST 2 49 amps which satisfies the supervisory overcurrent conditions described above Select volts 120 67 V and volts 120 67 V C B The ground distance elements are supervised by the negative sequence directional element Check the negative sequence quantities applied and verify that the 32QF element should assert ...

Page 319: ...e other output contacts and assert relay targets This is normal and is not a cause for concern Ground Quadrilateral Distance Element Resistive Reach Test Using Three Voltage Sources and One Current Source Note This test refers directly to the Zone 2 ground quadrilateral distance element but may be applied to any other forward reaching ground quadrilateral distance element zone To test reverse reac...

Page 320: ...se B phase and C phase to neutral relay voltage inputs Connect the current source to the A phase relay current input Refer to the voltage and current connections shown in Figure 7 6 as an example Step 4 Select the magnitude of the test signals IA and VA Table 7 6 summarizes the test quantities for the Zone 2 A G ground quadrilateral distance element based upon the example relay settings Table 7 6 ...

Page 321: ...quence current flowing in A phase for the fault IA0 zero sequence current flowing in A phase for the fault For a fault on a radial system with no load and when testing a ground distance element using a single current source IA IR IA2 IA 3 and IA0 IA 3 Equation 7 20 can be simplified ANG 1 Z 1 0 k 1 I I Im ANG 1 Z 1 0 k 1 I V Im R A A A A AG Equation 7 21 Select a value for VA Then it is possible t...

Page 322: ...ctions shown in Figure 7 6 the magnitude of IR is equal to the magnitude of the applied test current With a 50G2 setting of 0 60 amps 50G2 picks up when ITEST is greater than 0 60 amps The 50QF negative sequence overcurrent element operates based upon the magnitude of 3I2 applied Using the current connections shown in Figure 7 6 calculate the magnitude of 3I2 applied based upon the magnitude of IT...

Page 323: ...s 0 77 Ω Z2c applied 3 37 Ω is less than the Z2FT threshold 0 12 Ω therefore the 32QF element should assert when these signals are applied If Z2c applied is greater than the Z2FT threshold select new test current and voltages using the steps outlined above Step 5 Turn on the voltage sources Apply VA VB and VC at the magnitudes and angles listed in Table 7 6 Turn on the current test source Set the ...

Page 324: ... settings to determine which elements are enabled to trip Check the output logic equation settings to determine which outputs are enabled to trip Check the settings of elements that are enabled to trip Check the settings of elements that supervise elements that are enabled to trip Incorrect Distance Element Characteristic Shape Check the voltage and current connections by applying small signals to...

Page 325: ...your phase distance element test Incorrect Contact Operation Check the logic equation settings to determine which elements are enabled to operate the contact Check the event report to determine which elements asserted during the event Check the connections and test signals to ensure that the appropriate signals were applied to cause the element under test to assert RELAY TROUBLESHOOTING Inspection...

Page 326: ...d to Commands From Device Connected to Serial Port 1 Communications device not connected to system 2 Relay or communications device at incorrect baud rate or other communication parameter incompatibility including cabling error 3 System is processing event record Wait several seconds 4 System is attempting to transmit information but cannot due to handshake line conflict Check communications cabli...

Page 327: ...nt panel pull out the drawout unit exchange one or more integrated circuit IC chips and reassemble the relay If you do not wish to perform the modifications yourself we can assist you Simply return the relay and integrated circuit chips to us We will install the new chips and return the unit to you within a few days CAUTION This procedure requires that you handle electrostatic discharge sensitive ...

Page 328: ... screwdriver to pry the indicated ICs from their sockets being careful not to bend the IC pins or damage adjacent components Step 7 Carefully place the new ICs in the appropriate sockets Check the orientation of the ICs Be sure that each IC is in its corresponding socket Look for IC pins that are bent under or did not enter a socket hole CAUTION Verify proper orientation of the replaced ICs before...

Page 329: ...a second output board Note that IOBRD1 refers to the interface board terminating on relay terminals 201 through 240 IOBRD2 refers to the interface board terminating on relay terminals 301 through 340 Execute the SET L 1 command to enter the correct SELOGIC control equations for your application Execute the COPY command or the SET and SET L commands to enter settings for each of the remaining group...

Page 330: ...al FACTORY ASSISTANCE We appreciate your interest in SEL products and services If you have questions or comments please contact us at Schweitzer Engineering Laboratories Inc 2350 NE Hopkins Court Pullman WA USA 99163 5603 Tel 509 332 1890 Fax 509 332 7990 Internet www selinc com ...

Page 331: ...EST SET SETTINGS FOR TESTING DISTANCE RELAYS D 1 APPENDIX E SEL 5601 ANALYTIC ASSISTANT E 1 APPENDIX F SPECIAL APPLICATION SETTINGS F 1 Value of S for E51N E51Q F 1 Value of N1 or Y1 for ESPT Setting F 1 Value of Factory Settings LPVNOM and FQVPU F 2 APPENDIX G ADDITIONAL SEL 321 1 RELAY COMMUNICATIONS PROTOCOL G 1 APPENDIX H MIRRORED BITS COMMUNICATIONS H 1 Overview H 1 Settings H 1 Operation H 3...

Page 332: ...s I 2 Figure I 4 Interface Board 1 Component Layout Screw Terminal I 3 Figure I 5 Interface Board 1 Component Layout Plug In Connectors I 4 Figure I 6 Interface Board 2 Output Contacts Board Position 1 I 5 Figure I 7 Interface Board 2 Output Contacts Board Position 2 I 5 Figure I 8 Interface Board 2 Output Contacts Board Position 1 Plug In Connections I 6 Figure I 9 Interface Board 2 Output Contac...

Page 333: ...Y To find the firmware revision number in your relay obtain an event report which identifies the firmware using the EVENT command For firmware versions prior to July 21 2000 the status report displays the Firmware Identification FID label FID SEL 321 Rxxx Dxxxxxx or FID SEL 321 1 Rxxx Dxxxxxx For firmware versions with the date code of July 21 2000 or later the FID label will appear as follows wit...

Page 334: ...m previous versions as follows Improved diagnostics SEL 321 R411 980806 60 Hz 5 Amp 1 I O Board SEL 321 R461 980806 50 Hz 5 Amp 1 I O Board SEL 321 R510 980806 60 Hz 5 Amp 2 I O Boards SEL 321 R560 980806 50 Hz 5 Amp 2 I O Boards SEL 321 R610 980806 60 Hz 5 Amp 1 I O Board ACB Rotation SEL 321 R710 980806 60 Hz 5 Amp 2 I O Boards ACB Rotation SEL 321 R809 980806 60 Hz 1 Amp 1 I O Board SEL 321 R86...

Page 335: ... Boards ACB Rotation SEL 321 R807 60 Hz 1 Amp 1 I O Board SEL 321 R858 50 Hz 1 Amp 1 I O Board SEL 321 R907 60 Hz 1 Amp 2 I O Boards SEL 321 R956 50 Hz 1 Amp 2 I O Boards This firmware differs from previous versions as follows Remove problem where changing settings of ports with RTS CTS enabled CTS deasserted while messages pending could lead to communications lockup or vector halt Add check of 51...

Page 336: ...mp 2 I O Boards SEL 321 R556 50 Hz 5 Amp 2 I O Boards SEL 321 R606 60 Hz 5 Amp 1 I O Board ACB Rotation SEL 321 R706 60 Hz 5 Amp 2 I O Boards ACB Rotation SEL 321 R805 60 Hz 1 Amp 1 I O Board SEL 321 R856 50 Hz 1 Amp 1 I O Board SEL 321 R905 60 Hz 1 Amp 2 I O Boards SEL 321 R954 50 Hz 1 Amp 2 I O Boards This firmware differs from previous versions as follows Fixed UBEND and UBDURD DCUB timers SEL ...

Page 337: ...e differs from previous versions as follows Include support of 12 point I O Board SEL 321 R403 60 Hz 5 Amp 1 I O Board SEL 321 R453 50 Hz 5 Amp 1 I O Board SEL 321 R503 60 Hz 5 Amp 2 I O Boards SEL 321 R553 50 Hz 5 Amp 2 I O Boards SEL 321 R603 60 Hz 5 Amp 1 I O Board ACB Rotation SEL 321 R703 60 Hz 5 Amp 2 I O Boards ACB Rotation SEL 321 R802 60 Hz 1 Amp 1 I O Board SEL 321 R853 50 Hz 1 Amp 1 I O...

Page 338: ...pport of 8 output I O board SEL 321 R108 60 Hz 5 Amp 1 I O Board SEL 321 R208 60 Hz 5 Amp 2 I O Boards SEL 321 R158 50 Hz 5 Amp 1 I O Board The firmware differs from previous versions as follows Corrected error in POTT logic when ETDPU set to OFF Changed default setting for OSTD to 0 5 cycles Modified front panel setting SELECT function when setting is OFF SEL 321 R107 60 Hz 5 Amp 1 I O Board SEL ...

Page 339: ... differs from previous versions as follows Fixed UBEND and UBDURD DCUB timers SEL 321 R104 60 Hz 5 Amp 1 I O Board SEL 321 R204 60 Hz 5 Amp 2 I O Boards SEL 321 R154 50 Hz 5 Amp 1 I O Board This firmware differs from previous versions as follows Ability to change DATE and TIME settings from the front panel SEL 321 R103 60 Hz 5 Amp 1 I O Board SEL 321 R203 60 Hz 5 Amp 2 I O Boards SEL 321 R153 50 H...

Page 340: ...21 1 R876 Z001001 D20011203 50 Hz 1 Amp 1 I O Board SEL 321 1 R926 Z001001 D20011203 60 Hz 1 Amp 2 I O Boards SEL 321 1 R977 Z001001 D20011203 50 Hz 1 Amp 2 I O Boards This firmware differs from previous versions as follows Improved frequency tracking algorithm Availability of 59Q and 59P elements when advanced LOP is enabled SEL 321 1 R425 Z001001 D20011026 60 Hz 5 Amp 1 I O Board SEL 321 1 R475 ...

Page 341: ... ACB rotation SEL 321 1 R755 Z001001 D20000721 60 Hz 1 Amp 2 I O Boards ACB rotation SEL 321 1 R824 Z001001 D20000721 60 Hz 1 Amp 1 I O Board SEL 321 1 R874 Z001001 D20000721 50 Hz 1 Amp 1 I O Board SEL 321 1 R924 Z001001 D20000721 60 Hz 1 Amp 2 I O Boards SEL 321 1 R975 Z001001 D20000721 50 Hz 1 Amp 2 I O Boards This firmware differs from previous versions as follows Improved Fast Meter communica...

Page 342: ...60 Hz 1 Amp 1 I O Board SEL 321 1 R872 990415 50 Hz 1 Amp 1 I O Board SEL 321 1 R922 990415 60 Hz 1 Amp 2 I O Boards SEL 321 1 R973 990415 50 Hz 1 Amp 2 I O Boards This firmware differs from previous versions as follows Improved diagnostics SEL 321 1 R420 980806 60 Hz 5 Amp 1 I O Board SEL 321 1 R470 980806 50 Hz 5 Amp 1 I O Board SEL 321 1 R520 980806 60 Hz 5 Amp 2 I O Boards SEL 321 1 R570 98080...

Page 343: ...21 1 R869 980709 50 Hz 1 Amp 1 I O Board SEL 321 1 R919 980709 60 Hz 1 Amp 2 I O Boards SEL 321 1 R970 980709 50 Hz 1 Amp 2 I O Boards Firmware Part Revision No SEL 321 1 Relay Version Description of Firmware Revision B or C Main Board and Low Level Test Capability ET3 or TT3 This firmware differs from previous versions as follows Changed series compensation logic Changed long memory constant time...

Page 344: ...1 1 R567 50 Hz 5 Amp 2 I O Boards SEL 321 1 R618 60 Hz 5 Amp 1 I O Board ACB rotation SEL 321 1 R718 60 Hz 5 Amp 2 I O Boards ACB rotation SEL 321 1 R817 60 Hz 1 Amp 1 I O Board SEL 321 1 R867 50 Hz 1 Amp 1 I O Board SEL 321 1 R917 60 Hz 1 Amp 2 I O Boards SEL 321 1 R968 50 Hz 1 Amp 2 I O Boards Firmware Part Revision No SEL 321 1 Relay Version Description of Firmware Revision B or C Main Board an...

Page 345: ... Hz 1 Amp 2 I O Boards Firmware Part Revision No SEL 321 1 Relay Version Description of Firmware Revision B or C Main Board and Low Level Test Capability ET3 or TT3 This firmware differs from previous versions as follows Removed problem where entering an invalid command with several parameters i e EVE 1 U M BAD followed by SHOW L OUTn where n is 12 15 or 29 32 could result in a vector halt Removed...

Page 346: ...0 Hz 5 Amp 2 I O Boards ACB rotation SEL 321 1 R813 60 Hz 1 Amp 1 I O Board SEL 321 1 R863 50 Hz 1 Amp 1 I O Board SEL 321 1 R913 60 Hz 1 Amp 2 I O Boards SEL 321 1 R964 50 Hz 1 Amp 2 I O Boards This firmware differs from previous versions as follows Relay to relay integral communications assisted protection security enhancement SEL 321 1 R412 60 Hz 5 Amp 1 I O Board SEL 321 1 R462 50 Hz 5 Amp 1 I...

Page 347: ...21 1 R712 60 Hz 5 Amp 2 I O Boards ACB rotation SEL 321 1 R811 60 Hz 1 Amp 1 I O Board SEL 321 1 R861 50 Hz 1 Amp 1 I O Board SEL 321 1 R911 60 Hz 1 Amp 2 I O Boards SEL 321 1 R962 50 Hz 1 Amp 2 I O Boards This firmware differs from previous versions as follows Used PT input instead of PTRX in POTT logic Targeting modification to target on all rising edges of trip Direct transfer tripping allowed ...

Page 348: ...0 Hz 1 Amp 1 I O Board SEL 321 1 R909 60 Hz 1 Amp 2 I O Boards SEL 321 1 R960 50 Hz 1 Amp 2 I O Boards This firmware differs from previous versions as follows Corrected compressed ASCII configuration message Added CEV L and CEV C to compressed ASCII configuration message Display fault location LOC in CHI compressed ASCII command as a floating point number instead of a string Add device identificat...

Page 349: ...DPU set to OFF Changed default setting for OSTD to 0 5 cycles Corrected minor front panel display problem SEL 321 1 R406 60 Hz 5 Amp 1 I O Board SEL 321 1 R456 50 Hz 5 Amp 1 I O Board SEL 321 1 R506 60 Hz 5 Amp 2 I O Boards SEL 321 1 R556 50 Hz 5 Amp 2 I O Boards SEL 321 1 R607 60 Hz 5 Amp 1 I O Board ACB rotation SEL 321 1 R707 60 Hz 5 Amp 2 I O Boards ACB rotation SEL 321 1 R806 60 Hz 1 Amp 1 I ...

Page 350: ...n SEL 321 1 R705 60 Hz 5 Amp 2 I O Boards ACB rotation SEL 321 1 R804 60 Hz 1 Amp 1 I O Board SEL 321 1 R854 50 Hz 1 Amp 1 I O Board SEL 321 1 R904 60 Hz 1 Amp 2 I O Boards SEL 321 1 R955 50 Hz 1 Amp 2 I O Boards SEL 321 1 Relay includes SEL 321 Relay base version plus 51PTC setting which allow torque control of phase time overcurrent element by load encroachment element PULSE command to independe...

Page 351: ... 1 I O Board Rev A SEL 321 1 R175 Z001001 D20011026 50 Hz 5 Amp 1 I O Board Rev A SEL 321 1 R225 Z001001 D20011026 60 Hz 5 Amp 2 I O Boards Rev A This firmware differs from previous versions as follows Increased Z1ANG Z0ANG k01A and k0A setting ranges New LOP logic and IEC 1000 4 5 compliance Improved MIRRORED BITS communications Improved Fast Meter communications SEL 321 1 R124 Z001001 D20000721 ...

Page 352: ...ows Improved diagnostics SEL 321 1 R120 980806 60 Hz 5 Amp 1 I O Board Rev A SEL 321 1 R170 980806 50 Hz 5 Amp 1 I O Board Rev A SEL 321 1 R220 980806 60 Hz 5 Amp 2 I O Boards Rev A This firmware differs from previous versions as follows Correct problem where relay incorrectly processed SELOGIC Control Equations SEL 321 1 R119 980709 60 Hz 5 Amp 1 I O Board Rev A SEL 321 1 R169 980709 50 Hz 5 Amp ...

Page 353: ...d encroachment logic works as intended if PLAF and NLAF are set in same quadrant SEL 321 1 R117 60 Hz 5 Amp 1 I O Board Rev A SEL 321 1 R167 50 Hz 5 Amp 1 I O Board Rev A SEL 321 1 R217 60 Hz 5 Amp 2 I O Boards Rev A This firmware differs from previous versions as follows New MIRRORED BITS Protocol SEL 321 1 R116 60 Hz 5 Amp 1 I O Board Rev A SEL 321 1 R166 50 Hz 5 Amp 1 I O Board Rev A SEL 321 1 ...

Page 354: ...rom previous versions as follows Added global setting ERESTART Added RDMEM command SEL 321 1 R113 60 Hz 5 Amp 1 I O Board Rev A SEL 321 1 R163 50 Hz 5 Amp 1 I O Board Rev A SEL 321 1 R213 60 Hz 5 Amp 2 I O Boards Rev A This firmware differs from previous versions as follows Relay to relay integral communications assisted protection security enhancement SEL 321 1 R112 60 Hz 5 Amp 1 I O Board Rev A ...

Page 355: ... Amp 2 I O Boards Rev A This firmware differs from previous versions as follows Added relay to relay integral communications assisted protection SEL 321 1 R109 60 Hz 5 Amp 1 I O Board Rev A SEL 321 1 R159 50 Hz 5 Amp 1 I O Board Rev A SEL 321 1 R209 60 Hz 5 Amp 2 I O Boards Rev A This firmware differs from previous versions as follows Corrected compressed ASCII configuration message Added CEV L an...

Page 356: ...ev A SEL 321 1 R156 50 Hz 5 Amp 1 I O Board Rev A SEL 321 1 R206 60 Hz 5 Amp 2 I O Boards Rev A This firmware differs from previous versions as follows Correctly report inputs in configured Fast Meter message SEL 321 1 R105 60 Hz 5 Amp 1 I O Board Rev A SEL 321 1 R155 50 Hz 5 Amp 1 I O Board Rev A SEL 321 1 R205 60 Hz 5 Amp 2 I O Boards Rev A This firmware differs from previous versions as follows...

Page 357: ... contacts Limited Multidrop LMD protocol Fast Meter messages Compressed ASCII commands The CONTROL command which allows the user to set clear or pulse the new relay elements RB1 RB16 SEL 321 1 R102 60 Hz 5 Amp 1 I O Board Rev A SEL 321 1 R152 50 Hz 5 Amp 1 I O Board Rev A SEL 321 1 R202 60 Hz 5 Amp 2 I O Boards Rev A Firmware Part Revision No SEL 321 Relay Base Version Description of Firmware Revi...

Page 358: ......

Page 359: ...321 Main Board Jumper Connector and Socket Locations B 1 SEL 321 321 1 Instruction Manual APPENDIX B SEL 321 MAIN BOARD JUMPER CONNECTOR AND SOCKET LOCATIONS Figure B 1 SEL 321 Main Board Jumper Connector and Socket Locations ...

Page 360: ......

Page 361: ...ate Code 20011026 Application Guidelines C 1 SEL 321 321 1 Instruction Manual APPENDIX C APPLICATION GUIDELINES This section contains the following Application Guides AG93 03 REJO Application Guidelines ...

Page 362: ......

Page 363: ...gth of the protected line Next you may enter fault resistance which is used in the ground fault computations Enter source impedance as a per unit value with a base of the previously entered transmission line data For example if the radial system has a source impedance of about ten percent of the entered line impedance enter 0 1 for the per unit distance from the source to the bus Specify the dista...

Page 364: ... UA 67 VA 0 600 AR I AI J BR S R1 BI S S1 610 GOSUB 1000 620 AR RR AI RI BR 0 BI SQR 3 630 GOSUB 1000 635 TR RR TS RI 640 UB 67 0 5 TR 650 VB 67 SQR 3 2 TS 660 UC 67 0 5 TR 670 VC 67 0 5 SQR 3 TS 675 FF B C 680 GOSUB 4041 900 INPUT IMP BUS FAULT OR QUIT I B F Q A 910 IF A I THEN GOTO 50 920 IF A B THEN GOTO 75 930 IF A F THEN GOTO 120 ELSE GOTO 999 999 END 1000 REM MULT SUBROUTINE 1010 REM AR AI B...

Page 365: ...Date Code 20011026 SEL 5601 Analytic Assistant E 1 SEL 321 321 1 Instruction Manual APPENDIX E SEL 5601 ANALYTIC ASSISTANT See brochure flyer at the front of the manual ...

Page 366: ......

Page 367: ...With typical settings of Y or N the time overcurrent accumulation is blocked for a single pole open SPO condition When E51N is set to S SPO does not block the 51N elements When E51Q is set to S SPO does not block the 51Q elements VALUE OF N1 OR Y1 FOR ESPT SETTING N1 activates special Scheme 1 Trip Logic if the SPTE contact enables single pole tripping Y1 activates special Scheme 1 Trip Logic equa...

Page 368: ... positive sequence voltage required to reset loss of potential LOP upon the restoration of voltage The default setting of 57 volts will provide correct operation for systems down to a nominal secondary voltage of 100 V line to line Setting FQVPU sets the magnitude of A phase voltage at which the relay enables frequency tracking Certain system configurations such as series compensated lines may req...

Page 369: ...IX G ADDITIONAL SEL 321 1 RELAY COMMUNICATIONS PROTOCOL This section contains the following Application Guides AG94 03 SEL Distributed Port Switch Protocol LMD AG95 10 Configuration and Fast Meter Messages AG95 11 SEL 321 1 SEL 321 2 Configuration and Fast Meter Messages AG95 03 SEL 321 1 Compressed ASCII Commands ...

Page 370: ......

Page 371: ...rrored Bits RMB_ Debounce DO time 1 8 msgs RMB1DO 1 Mirrored Bits RMB_ Debounce PU time 1 8 msgs RMB2PU 1 Mirrored Bits RMB_ Debounce DO time 1 8 msgs RMB2DO 1 Mirrored Bits RMB_ Debounce PU time 1 8 msgs RMB3PU 1 Mirrored Bits RMB_ Debounce DO time 1 8 msgs RMB3DO 1 Mirrored Bits RMB_ Debounce PU time 1 8 msgs RMB4PU 1 Mirrored Bits RMB_ Debounce DO time 1 8 msgs RMB4DO 1 Mirrored Bits RMB_ Debou...

Page 372: ...nnel has too many errors The modem uses the relay s RTS signal to determine whether the new or old MIRRORED BITS protocol is in use Mirrored Bits Receive bad pickup 1 10000 sec RBADPU 60 Use the RBADPU setting to determine how long a channel error must last before the relay element RBAD is asserted RBAD is instantaneously deasserted when the channel error is corrected Mirrored Bits Channel bad pic...

Page 373: ...ts RMB_ Debounce DO time 1 8 msgs RMB5DO 1 Mirrored Bits RMB_ Debounce PU time 1 8 msgs RMB6PU 1 Mirrored Bits RMB_ Debounce DO time 1 8 msgs RMB6DO 1 Mirrored Bits RMB_ Debounce PU time 1 8 msgs RMB7PU 1 Mirrored Bits RMB_ Debounce DO time 1 8 msgs RMB7DO 1 Mirrored Bits RMB_ Debounce PU time 1 8 msgs RMB8PU 1 Mirrored Bits RMB_ Debounce DO time 1 8 msgs RMB8DO 1 Supervise the transfer of receive...

Page 374: ...s to pass The pickup and dropout security count settings are separate Note Pickup dropout security counters operate identically to pickup dropout timers except they are set in counts of received messages instead of time This is straightforward when an SEL 321 Relay is talking to an SEL 321 Relay For all of the following examples assume 38400 baud which allows a full message to be transmitted in 1 ...

Page 375: ...hen the attention message will go all the way around the loop and will eventually be received by the originating node It will then be discarded and data transmission will resume This method of synchronization allows the nodes to reliably determine which character is the first character of the message It also forces a mis synchronized relay to become re synchronized This method takes down the entir...

Page 376: ...framing errors If the channel is presently down the COMM record will only show the initial cause but the COMM summary will display the present cause of failure When the duration of an outage exceeds the setting RBADPU the relay will assert the relay element RBAD Note RBAD is typically combined with other alarm conditions using SELOGIC Control Equations When channel unavailability exceeds the setti...

Page 377: ...rd Inputs Outputs Interface 1 8 16 Standard Shared Terminal Interface 2 8 12 Standard Independent Interface 6 8 12 High Current Interrupting Interface board 2 is listed as option 3 on the screw terminal ordering information sheet INTERFACE BOARD 1 16 OUTPUTS 8 INPUTS SCREW TERMINAL OR PLUG IN CONNECTIONS Optoisolated Inputs All eight control inputs are dry optoisolated inputs and are not polarity ...

Page 378: ... share a common terminal for each pair of contacts but are not polarity dependent The rear of the relay will be similar to the following figures Figure I 1 Interface Board 1 Output Contacts Board Position 1 Figure I 2 Interface Board 1 Output Contacts Board Position 2 Figure I 3 Interface Board 1 Output Contacts Board Position 1 Plug In Connections Configure the output contacts as a contacts or b ...

Page 379: ...Date Code 20011026 Interface Board Specifications I 3 SEL 321 321 1 Instruction Manual Figure I 4 Interface Board 1 Component Layout Screw Terminal ...

Page 380: ...I 4 Interface Board Specifications Date Code 20011026 SEL 321 321 1 Instruction Manual Figure I 5 Interface Board 1 Component Layout Plug In Connectors ...

Page 381: ...brought out for each input There are no internal connections between inputs The inputs will assert within 2 ms and draw approximately 4 mA of current at nominal voltage For further information see General Specifications in Section2 Output Contacts 30 A make 6 A carry Not rated for interrupting duty Closing pickup for a contacts dropout for b contacts 1 4 cycle or less Opening dropout for a contact...

Page 382: ...g In Connections Figure I 9 Interface Board 2 Output Contacts Board Position 2 Plug In Connections Configure the output contacts as a contacts or b contacts with solder jumpers Figure I 10 and Figure I 11 show the locations of the jumpers and explain the jumper positions Contacts are factory configured as a contacts except the alarm contact which is b ...

Page 383: ...Date Code 20011026 Interface Board Specifications I 7 SEL 321 321 1 Instruction Manual Figure I 10 Interface Board 2 Component Layout Screw Terminal ...

Page 384: ...I 8 Interface Board Specifications Date Code 20011026 SEL 321 321 1 Instruction Manual Figure I 11 Interface Board 2 Component Layout Plug In Connectors ...

Page 385: ... less than 10 ms 00001 seconds Due to relay capabilities the outputs of the SEL 321 Relay are specified at 200 ms 0002 seconds The output contacts may be configured as either a or b contacts with solder jumpers Figure I 15 show the locations of the jumpers and explain the jumper positions Contacts are factory configured as a contacts except the alarm contact which is b Short transient inrush curre...

Page 386: ...will be similar to the following drawings Figure I 12 Interface Board 5 Output Contacts Board Position 1 Figure I 13 Interface Board 5 Output Contacts Board Position 2 Figure I 14 Possible Connections for Fast High Current Interrupting Output Contacts Circuit Load Not Shown Third Terminal Connection is Optional ...

Page 387: ...Date Code 20011026 Interface Board Specifications I 11 SEL 321 321 1 Instruction Manual Figure I 15 Interface Board 5 Component Layout Screw Terminal ...

Page 388: ...terrupt for L R 0 02 seconds at 250 Vdc Closing pickup for a contacts dropout for b contacts 1 4 cycle or less Opening dropout for a contacts pickup for b contacts 1 2 cycle or less typical is 1 4 cycle Interface board 6 provides 12 output contacts These 12 High Current Interrupting dry output contacts can interrupt 10 A of inductive current with an L R 0 04 seconds at 125 Vdc At 250 Vdc they will...

Page 389: ...Date Code 20011026 Interface Board Specifications I 13 SEL 321 321 1 Instruction Manual Figure I 18 Interface Board 6 Component Layout Plug In Connectors ...

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Page 391: ...BG4 MBG3 MBG2 MBG1 16 XCG4 XCG3 XCG2 XCG1 MCG4 MCG3 MCG2 MCG1 17 MBC4 MBC3 MBC2 MBC1 MAB4 MAB3 MAB2 MAB1 18 SPOC SPOB SPOA MCA4 MCA3 MCA2 MCA1 19 50HH OSTI 50CA 50BC 50AB 20 RBAD CBAD LBOK ROK TOP 21 LP1 SS3 SS2 SS1 EXT DT BT PT 22 EXTUL PARC PARB PARA SPTE PTXFR LP2 LOG 23 LP3 CLOSE 52AC2 52AC1 52AB2 52AB1 52AA2 52AA1 24 LP5 LP4 TCMC2 TCMC1 TCMB2 TCMB1 TCMA2 TCMA1 25 DTA DTB DTC LP6 LP7 LP8 LP9 L...

Page 392: ...44 IN8 IN7 IN6 IN5 IN4 IN3 IN2 IN1 45 RMB8 RMB7 RMB6 RMB5 RMB4 RMB3 RMB2 RMB1 SEL 321 1 Relay Two I O Board Version TAR Status Indicators 40 OUT1 OUT2 OUT3 OUT4 OUT5 OUT6 OUT7 OUT8 41 OUT9 OUT10 OUT11 OUT12 OUT13 OUT14 OUT15 ALARM 42 OUT17 OUT18 OUT19 OUT20 OUT21 OUT22 OUT23 OUT24 43 OUT25 OUT26 OUT27 OUT28 OUT29 OUT30 OUT31 OUT32 44 TMB8 TMB7 TMB6 TMB5 TMB4 TMB3 TMB2 TMB1 45 MIRBRK MIRFRA MIRPAR ...

Page 393: ...cycle standard EVE n L 1 16 cycle standard EVE n R 1 16 cycle unfiltered EVE n C 1 16 cycle SEL 5601 Event Report EVE n U 1 16 cycle unfiltered GROUP Shows setting group to use in lieu of active group HISTORY Shows DATE TIME ZONE TYPE LOCATION distance GROUP and front panel targets for the last 40 events IRIG Force immediate attempt to synchronize internal relay clock to time code input Reports ID...

Page 394: ...ALARM contacts closed momentarily after password entry PAS 1 OTTER sets Level 1 password to OTTER PAS 2 TAIL sets Level 2 password to TAIL SET n Use to enter group settings If n argument omitted edits active group SET G Use to enter new global settings SET L Use SET L n to edit Group n s logic settings Selects active logic group to edit SET P Use SET P n to edit Port n s settings Changes active po...

Page 395: ...ALARM contacts when year entered differs from year stored EVENT Shows event record EVE 1 shows newest event EVE 12 shows oldest Default report is 1 4 cycle standard EVE n L 1 16 cycle standard EVE n R 1 16 cycle unfiltered EVE n C 1 16 cycle SEL 5601 Event Report EVE n U 1 16 cycle unfiltered GROUP Shows setting group to use in lieu of active group HISTORY Shows DATE TIME ZONE TYPE LOCATION distan...

Page 396: ...R Disables MIRRORED BITS loop back mode PASSWORD Shows or sets passwords Command pulses ALARM contacts closed momentarily after password entry PAS 1 OTTER sets Level 1 password to OTTER PAS 2 TAIL sets Level 2 password to TAIL PULSE n t Closes an output contact for testing and control purposes SEL 321 1 only RDMEM m Use to download contents of selected memory areas m RAM EEPROM or ALL SET n Use to...

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