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I.L. 40-385.5

13-7

(8) The setting of TTYP is for selecting the reclos-

ing mode on single pole trip applications (if
applied). It has six selecting positions, OFF,
1PR, 2PR, 3PR, SPR and SR3R. Refer to the
guidances for reclosing mode programming for
the TTYP setting selection.

For example, Set MDAR (REL-300)

TTYP = SR3R.

(9) The settings of Z1RI, Z2RI and Z3RI provide

the selectivity for the Zone-1 RI (reclosing initi-
ation), Zone-2 RI and Zone-3 RI, respectively.
On pilot system applications, the Z1RI should
be set to YES if reclosing initiation is required.
On non-pilot system application, set Z1RI,
Z2RI and/or Z3RI to YES if RI is required when
the particular distance zone operates.

For example, Set MDAR (REL-300)

Z1RI = YES

Z2RI = NO
Z3RI = NO

(10) For pilot systems, set BFRB to YES if “RB on

breaker failure squelch” feature is required.

For example, Set MDAR (REL-300)

BFRB = YES

(11) The setting of PLT (pilot) combines with the

external input signal of Pilot Enable (on back-
plane panel) controls the operation of pilot and
reclosing initiation. The absence of either sig-
nal will:

(a) disable the pilot system,
(b) block the 3RI output, and
(c) allow SRI output on non-pilot system.

The PLT can be set either locally from the front
panel, or remotely via the communication
channel. For example, Set MDAR (REL-300)
PLT = YES

(12) The STYP (system type) selects the desired

relaying system in application. It has two selec-
tions, 3ZNP (3 zone non-pilot) and Z1E (Zone-
1 extension) in non-pilot MDAR (REL-300).
There are five selections, 3ZNP, Z1E, POTT
(permissive overreach transfer trip or Unblock-
ing), PUTT (permissive underreach transfer
trip) and BLK (blocking) in pilot MDAR (REL-
300) version 2.60. It should be selected and set
to the one which is desired.

For example, Set MDAR (REL-300)

STYP = BLK

(13) For pilot MDAR (REL-300) only, the WFEN

(weakfeed enable) setting should be selected
to YES for the weakfeed terminal if applicable.

For example, Set MDAR (REL-300)

WFEN = NO

(14) For non-pilot system, depends on the applica-

tion, the Zone-3 distance units, Z3P and Z3G,
can be selected to reach forward looking or
reverse looking by setting the Z3FR (Zone-3
forward or reverse) to FWD or REV.

For pilot system, the zone-3 distance units

should be set to reverse looking for carrier start
(blocking scheme) or reverse block (POTT
scheme).

For example, Set MDAR (REL-300)

Z3FR = REV

(15) The LV-units are used in CIFT. It should nor-

mally be set to 40 volts unless a higher setting
is required for more sensitive application.

For example, Set MDAR (REL-300) LV = 40

(16) Based on the power system requirement, the

OSB1, OSB2 and/or OSBP can be selected to
either YES or NO.

For example, Set MDAR (REL-300)

OSB1 = YES

OSB2 = YES

OSBP = YES

(17) Based on the requirements, set the CIF (close-

into-fault) to YES or NO.

For example, Set MDAR (REL-300) CIF = YES

(18) Set the LLT (loss-of-load trip) to YES, FDOG or

NO. Where:

YES

— LLT trip with Z2 supervision.

FDOG — LLT trip with both Z2 and FDOG

supervision.

NO

— LLT trip function is not used.

For example, Set MDAR (REL-300)

LLT = FDOG

(19) Set the LOPB to YES if loss-of-potential block

trip function is required.

For example, Set MDAR (REL-300)

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Summary of Contents for MDAR

Page 1: ... DISTANCE PROTECTION MDAR REL 300 RELAYING SYSTEMS ABB Power T D Company Inc Relay Division Coral Springs FL 33065 4300 Coral Ridge Drive January 1996 Instruction Manual 40 385 5 V2 62 954 752 6700 800 523 2620 ...

Page 2: ...GE SUMMARY A CHANGE BAR LOCATED IN THE MARGIN REPRESENTS A TECHNICAL CHANGE TO THE PRODUCT A STAR LOCATED BY THE SUB NUMBER REPRESENTS A TECHNICAL CHANGE TO THE DRAWING DATE REV LEVEL PAGES REMOVED PAGES INSERTED 11 95 Released ...

Page 3: ...and OR144B for zone 1 and single pole trip The AND144E has two inputs OR145 and X2 The relay should trip on the second fault after the SPT regardless of the phase type selection 9 Added an OR76A between AND48A and AND76 Added WFT3 to the input of OR76A In V2 60 there are no trip actions for multi phase fault Ph Ph or 3 Ph with the settings of TTYP SR3R STYP POTT and WFEN YES 10 Changed the SPF log...

Page 4: ...re in order to block both ends for 3 cycles if a reverse fault is detected 2 LOAD LOSS TRIP LLT For a system if its maximum tapped load may exceed minimum through load in the protected line the setting of LLT should be set to NO Refer to section 9 12 for the detailed information 3 RECLOSE APPLICATION The signals from MDAR to Recloser are Reclose Initiate RI2 3 pole RI1 Single pole and Reclose Bloc...

Page 5: ...s or individual components ABB does not assume liability arising out of the application or use of any product or circuit described herein ABB reserves the right to make changes to any products herein to improve reliability function or design Spec ifications and information herein are subject to change without notice All possible contingencies which may arise during installation operation or mainte...

Page 6: ...on 13 SETTING CALCULATIONS AND SELECTIONS 13 1 APPENDIX A 1 FULL PERFORMANCE TESTS A 1 A 2 ACCEPTANCE MAINTENANCE TESTS A 13 A 3 SYSTEM DRAWINGS A 24 Trademarks All terms mentioned in this book that are known to be trademarks or service marks are listed below In addition terms suspected of being trademrks or service marks have been appropriately capitalized ABB Power T D Com pany Inc cannot attest...

Page 7: ...c A 32 15 MDAR REL 300 Zone 1 Trip Logic A 33 16 MDAR REL 300 Zone 2 Trip Logic A 34 17 MDAR REL 300 Zone 3 Trip Logic A 35 18 MDAR REL 300 Highset Trip Logic A 36 19 MDAR REL 300 Close into Fault Trip A 36 20 MDAR REL 300 Unequal Pole Closing Load Pickup Control A 37 21 MDAR REL 300 Inverse Time Overcurrent Ground Backup Logic A 37 22 MDAR REL 300 Zone 1 Extension Scheme A 38 23 Load Loss Aceller...

Page 8: ... 38 Simplified MDAR Version 2 60 SPT Logic A 49 39 MDAR Block Diagram A 50 40 System Drawing V2 60 pg 1 of 3 A 51 41 System Drawing V2 60 pg 2 of 3 A 52 42 System Drawing V2 60 pg 3 of 3 A 53 List of Figures continued ...

Page 9: ...han 200 ms d Separated out of step override timers OSOT1 and OSOT2 for Z1 and Z2 Timer range is 500 1000 0 ms in stead of 400 4000 0 ms 1 2 2 Single pole trip logic a Use trip signals TRSLA TRSLB TRSLC and the resetting of faulted phase current signal for pole disagreement identification b The SPF ROF and 62T logic for SPT have been modified 1 2 3 Due to the hardware limitation the Stub bus and 3 ...

Page 10: ... the potential benefits the microprocessor can bring to the system protection function as well as the overall operation of the elec tric utility The implementation of these technologies will be paced as we gradually grow into the future changing and improving our concepts of operating requirements And we have with MDAR REL 300 a product designed for today s requirements and tomorrow s solutions si...

Page 11: ...n c Blocking d PUTT permissive underreach transfer trip e POTT permissive overreach transfer trip and Unblocking 2 1 7 Additional Unique functions a Current and voltage change fault detectors I V b Overcurrent supervision of phase and ground distance units c Loss of potential supervision LOPB d Loss of current monitoring LOI e Close into fault trip CIFT with LV unit supervi sion f Unequal pole clo...

Page 12: ...with special design logic for China 2 2 OPTIONAL FUNCTIONS 2 2 1 Optional FT 14 switches 2 2 2 Optional Single pole trip function with special design logic for China This function includes the following functions a SPT SRI on first fault b 3PT RB if reclosing on a permanent fault c 3PT RB if second phase s fault during single phasing d 3PT on a preset time limit 62T if the system fails to reclose ...

Page 13: ...a digital filtering algorithm The first line surge protection for each input and out put terminals are also located on the backplane mod ule The backplane module is mounted on the outer chassis All of the relay circuitry is located on the other modules mounted on the inner chassis to which the front panel is attached The inner chassis slides in or out of the outer chassis from the front The backpl...

Page 14: ...rrier stop STOP Reed 1A or 1B 24 V K5 SRI RI1 Telephone DPDT 5 A K6 3RI RI2 Telephone DPDT 5 A K7 RB Telephone DPDT 5 A K8 K1 Breaker current monitor Reed Form A 0 5 A K9 K2 Breaker current monitor Reed Form A 0 5 A K10 Carrier send SEND Reed 1A or 1B 24 V K13 System test Telephone DPDT 5 A K14 Alarm 3 GS for LOP LOI Reed 1A 24 V See Section 4 paragraph 4 2 4 for more information delay on dropout ...

Page 15: ...eric display 0 7 inch high A software display saver is built in The MDAR REL 300 display will be on only 5 minutes after turning in the DC power supply or depressing any one of the front panel pushbutton or detecting any fault on the line LED s show display modes Pushbutton switches no external equipment is required are used to change modes read target or operation data call metering displays and ...

Page 16: ... for MDAR REL 300 system without single pole trip i e catalog number MD3xxxxxxx JMP3 set to OUT position for version 2 60 JMP4 should normally be set to OUT Set it to IN position for enabling the trip contact with 50 ms dropout time delay feature JMP5 should normally be set to OUT Set it to IN position for enabling the output contact tests feature JMP6 should normally be set to OUT except for maki...

Page 17: ...s are performed all of the time in the background mode as shown An important detail not shown in Figure 7 is that many of the checks are broken into small parcels so that the whole complement of tasks is performed over an one cycle period eight passes through the loop some of the checks are done more than once each cycle During non fault operation the programs follow the Background Mode loop The p...

Page 18: ...e The servicing of the operator interface is one of these functions the display is updated pushbut tons are acknowledged and the LED s are con trolled Metering of the analog inputs updating the target information for display purposes and checking the validity of the settings in the nonvolatile memory are other functions performed only in Background Mode Fault detection is in effect at all time in ...

Page 19: ...ity if IX Ko Io ZCG product is higher than the phase voltage VXG Correction of this problem is to supervise the distance unit with FDOG unit 6 1 2 3Ø fault detection 3Ø fault protection is accomplished by the logic of any operation of one of the three ØG units ØA ØB an ØC plus the 3ØF output signal from the faulted phase selector unit However for 3Ø fault condition the equations for the computatio...

Page 20: ...ne the fault type If none of the nine fault types in the table are identi fied then the fault must be identified as a three phase fault 6 3 FORWARD DIRECTIONAL OVERCURRENT PHASE UNIT FDOP The inordinately high influence of ct lead resistance for a low voltage MPS test with the Motor Generator set as one of the test sources produces virtually a 90 phase shift in the polarizing voltage with the angl...

Page 21: ...and I 2 phasors Maximum sensitivity for the forward direction unit occurs when V2 lags with I2 by 98 The sensitivity of this element is 3V2 1 0 volts and 3I 2 0 5 amp 6 5 FAULT DETECTION UNITS MDAR REL 300 detects faults by digital computa tion rather than analog The relay normally operates in a background mode where it looks for phase current or phase voltage dis turbance Once a phase disturbance...

Page 22: ...ing by the distance multiplier setting XPUD Distance imag Z x VTR CTR XPUD Operation occurs if the operating voltage leads the polarizing voltage The characteristic curves are shown in Figure 11 Both inner and outer blinders are included in phases A and B for OS detection on SPT operation Inner and outer blinder reaches are determined by the set ting of RT and RU respectively 6 8 FAULT LOCATOR The...

Page 23: ...ot affect the relay protection function There are five test points on the MDAR REL 300 relay front panel to measure power supply voltage The test points provide measurement of the 24 5 12 and 12 Vdc voltages The serial port on the rear panel Figure 2 is pro vided for remote transmission of target data remote setting and optional oscillographic data It also can be used for future networking data co...

Page 24: ...ault data using the RAISE and LOWER FUNCTION pushbuttons Refer to Chapter XI for more detail 7 2 5 Display Test Mode Functions The test display mode provides diagnostic and test ing capabilities for MDAR REL 300 Information of relay status A D calibration testing of the carrier send and receive functions for the pilot systems and trip relay test are among the functions provided To access the test ...

Page 25: ...ll faults w 3RI 3PR 5 SPT on DG fault w SRI 3PT on MD fault w o RI SPR 6 SPT on DG fault w SRI 3PT on MD fault w 3RI SR3R Single phasing limit timer 62T 0 300 5 000 in 0 05 sec steps Timer for pole disagreement SPTT 1 000 6 000 in 1 0 sec steps RI on Z1 trip Z1RI YES NO RI on Z2 trip Z2RI YES NO RI on Z3 trip Z3RI YES NO RB on BF squelch BFRB YES NO Remote pilot control PLT YES NO Pilot system sel...

Page 26: ...0 5 amp steps Out of step block zone 1 OSB1 YES NO Out of step block zone 2 OSB2 YES NO Out of step block pilot OSBP YES NO OS OS override timers OSTM 500 1000 ms OSB inner blinder RT 1 00 15 00 0 1 ohm steps OSB outer blinder RU 3 00 15 00 0 1 ohm steps Directional ground units DIRU ZSEQ NSEQ DUAL Ground backup time curves GBCV CO 2 CO 5 CO 6 CO 7 CO 8 CO 9 and CO 11 Ground backup setting GBPU 0 ...

Page 27: ...merical v ang VAG deg Phase B current mag IB ang IB Phase B voltage mag VBG deg VBG Phase C current mag IC ang IC Phase C voltage mag VCG ang VCG Date DATE XX XX month day Time TIME XX XX hour minute Local Remote Setting SET LOC REM BOTH Carrier Receiver 1 RX 1 YES NO LOP Indication LOP YES NO LOI indication LOI YES NO Out of step block OSB YES NO Optional Note All displayed phase angles are refer...

Page 28: ...minute 4 second SEC XX XX second Fault type FTYP AG BG CG AB BC CA ABG BCG CAG ABC BKR 1 DA tripped BK1A YES NO BKR 1 DB tripped BK1B BKR 1 DC tripped BK1C BKR 2 DA tripped BK2A YES NO BKR 2 DB tripped BK2B BKR 2 DC tripped BK2C Zone 1 phase tripped Z1P YES NO Zone 1 ground tripped Z1G Zone 2 phase tripped Z2P Zone 2 ground tripped Z2G Zone 3 phase tripped Z3P YES NO Zone 3 ground tripped Z3G Pilo...

Page 29: ...es are referred to VA as reference Note The Relay In Service LED indicates the MDAR REL 300 ms system is in service It will come on when the dc is applied and after the system is initialized 4 Test Functions Display Five functions are available in the test function mode They are STAT ADC RS1 TK and TRIP STAT The STAT is the relay self check status MDAR REL 300 jumps to the test mode status display...

Page 30: ...on the following ten contacts can be selected for testing Refer to Chapter VIII for more detailed information TRIP RELY BFI RELY RI1 RELY RI2 RELY RB RELY AL1 RELY AL2 RELY GS RELY SEND RELY STOP RELY 7 4 16 FAULT RECORDS AND INTERMEDIATE TARGETS Refer to chapter 11 for detail ...

Page 31: ...action For failures which do not disable the processor MDAR REL 300 jumps to the TEST mode status display STAT to show the cause of the problem The cause of the problem is represented by their corre sponding bits zero thru 6 in the value field Bit 0 External RAM Failure Bit 1 EEPROM warning Bit 2 ROM EPROM checksum error Bit 3 EEPROM Failure Non Volatile memory Bit 4 Analog Input Circuit Failure B...

Page 32: ... test 1 Remove JMP10 spare on the processor module and place it in the JMP5 posi tion 2 Change the LED mode to TEST and select the tripping function field and the desired contact in the value field 3 Push the ENTER button the ENTER LED should be ON The corresponding relay should operate when the ENTER button is pressed 4 Remove JMP5 and replace it on JMP10 8 4 FUNCTIONAL TEST The functional test s...

Page 33: ...Logic AND 1A 1B 1C 1E and OR 1D and 150 0 0 3500 ms timer circuits in Figure 12A are for solving these problems This logic unblocks the LOPB circuit and provides a 3500 ms trip window for the distance units to trip if the fault current is detected within 150 ms after LOP has been set up The 150 ms timer can be extended to 500 ms if a jumper JMP3 on the Microprocessor module is installed 9 2 MONITO...

Page 34: ...cations Refer to Chapter XI paragraph G for a more detailed explanation Similar operations function for Zone 1 single phase to ground faults The Z1G unit sees the fault and operates along with the IOM and FDOG units satisfy ing AND 3 Tripping is initiated via OR 2 with Zone 1 ground trip Z1G indication Logic AND 3 is also supervised by the signal of RDOG reverse direc tional overcurrent ground for...

Page 35: ...ng LOP condition if the LOPB setting is set to YES These high set trip functions can be disabled by set ting the ITP phase and or ITG ground to OUT 9 8 CLOSE INTO FAULT TRIP In order to supplement distance unit operation when the circuit breaker is closed into a fault and line side potential is used The CIF close into fault trip circuit as shown in Figure 19 includes logic AND 22 OR 3 and 100 180 ...

Page 36: ...ng this scheme The targets Z1P Z1G will indicate either zone 1 trip and or Z1E trip operations The other functions such as Z2T Z3T ac trouble monitoring overcurrent supervision IT CIF unequal pole closing load pickup control load loss acceleration trip etc would remain the same as in the basic scheme 3ZNP For a remote internal fault Figure 22 either Z1P or Z1G will see the fault since they overrea...

Page 37: ...ose block RB functions RI1 used for reclose initiation on single pole trip RI2 used for reclose initiation on 3 pole trip RB used for reclose block The operation of RI1 RI2 and RB contacts is con trolled by the setting of the programmable reclose ini tiation logic as shown in Figure 24 The operation of either RI1 RI2 or RB must be confirmed by the signal of TRSL which is the trip output of MDAR RE...

Page 38: ...e initiation on single pole trip or pilot applica tions 9 14 POWER SWING BLOCK SUPERVISION OSB The Out of step blocking OSB logic in MDAR REL 300 is a dual blinder scheme It contains two blinder units providing 4 blinder lines The nature of the logic shown in Figure 25 is that the outer blinder 21BO must operate 50 ms or more ahead of the inner blinder 21BI in order for an OS condition to be ident...

Page 39: ...ot affect the relay protection function There are five test points on the MDAR REL 300 relay front panel to measure power supply voltage The test points provide measurement of the 24 5 12 and 12 Vdc voltages The serial port on the rear panel Figure 2 is pro vided for remote transmission of target data remote setting and optional oscillographic data It also can be used for future networking data co...

Page 40: ...ault data using the RAISE and LOWER FUNCTION pushbuttons Refer to Chapter XI for more detail 7 2 5 Display Test Mode Functions The test display mode provides diagnostic and test ing capabilities for MDAR REL 300 Information of relay status A D calibration testing of the carrier send and receive functions for the pilot systems and trip relay test are among the functions provided To access the test ...

Page 41: ...ll faults w 3RI 3PR 5 SPT on DG fault w SRI 3PT on MD fault w o RI SPR 6 SPT on DG fault w SRI 3PT on MD fault w 3RI SR3R Single phasing limit timer 62T 0 300 5 000 in 0 05 sec steps Timer for pole disagreement SPTT 1 000 6 000 in 1 0 sec steps RI on Z1 trip Z1RI YES NO RI on Z2 trip Z2RI YES NO RI on Z3 trip Z3RI YES NO RB on BF squelch BFRB YES NO Remote pilot control PLT YES NO Pilot system sel...

Page 42: ...0 5 amp steps Out of step block zone 1 OSB1 YES NO Out of step block zone 2 OSB2 YES NO Out of step block pilot OSBP YES NO OS OS override timers OSTM 500 1000 ms OSB inner blinder RT 1 00 15 00 0 1 ohm steps OSB outer blinder RU 3 00 15 00 0 1 ohm steps Directional ground units DIRU ZSEQ NSEQ DUAL Ground backup time curves GBCV CO 2 CO 5 CO 6 CO 7 CO 8 CO 9 and CO 11 Ground backup setting GBPU 0 ...

Page 43: ...merical v ang VAG deg Phase B current mag IB ang IB Phase B voltage mag VBG deg VBG Phase C current mag IC ang IC Phase C voltage mag VCG ang VCG Date DATE XX XX month day Time TIME XX XX hour minute Local Remote Setting SET LOC REM BOTH Carrier Receiver 1 RX 1 YES NO LOP Indication LOP YES NO LOI indication LOI YES NO Out of step block OSB YES NO Optional Note All displayed phase angles are refer...

Page 44: ...minute 4 second SEC XX XX second Fault type FTYP AG BG CG AB BC CA ABG BCG CAG ABC BKR 1 DA tripped BK1A YES NO BKR 1 DB tripped BK1B BKR 1 DC tripped BK1C BKR 2 DA tripped BK2A YES NO BKR 2 DB tripped BK2B BKR 2 DC tripped BK2C Zone 1 phase tripped Z1P YES NO Zone 1 ground tripped Z1G Zone 2 phase tripped Z2P Zone 2 ground tripped Z2G Zone 3 phase tripped Z3P YES NO Zone 3 ground tripped Z3G Pilo...

Page 45: ...es are referred to VA as reference Note The Relay In Service LED indicates the MDAR REL 300 ms system is in service It will come on when the dc is applied and after the system is initialized 4 Test Functions Display Five functions are available in the test function mode They are STAT ADC RS1 TK and TRIP STAT The STAT is the relay self check status MDAR REL 300 jumps to the test mode status display...

Page 46: ...on the following ten contacts can be selected for testing Refer to Chapter VIII for more detailed information TRIP RELY BFI RELY RI1 RELY RI2 RELY RB RELY AL1 RELY AL2 RELY GS RELY SEND RELY STOP RELY 7 4 16 FAULT RECORDS AND INTERMEDIATE TARGETS Refer to chapter 11 for detail ...

Page 47: ...Logic AND 1A 1B 1C 1E and OR 1D and 150 0 0 3500 ms timer circuits in Figure 12A are for solving these problems This logic unblocks the LOPB circuit and provides a 3500 ms trip window for the distance units to trip if the fault current is detected within 150 ms after LOP has been set up The 150 ms timer can be extended to 500 ms if a jumper JMP3 on the Microprocessor module is installed 9 2 MONITO...

Page 48: ...cations Refer to Chapter XI paragraph G for a more detailed explanation Similar operations function for Zone 1 single phase to ground faults The Z1G unit sees the fault and operates along with the IOM and FDOG units satisfy ing AND 3 Tripping is initiated via OR 2 with Zone 1 ground trip Z1G indication Logic AND 3 is also supervised by the signal of RDOG reverse direc tional overcurrent ground for...

Page 49: ...ng LOP condition if the LOPB setting is set to YES These high set trip functions can be disabled by set ting the ITP phase and or ITG ground to OUT 9 8 CLOSE INTO FAULT TRIP In order to supplement distance unit operation when the circuit breaker is closed into a fault and line side potential is used The CIF close into fault trip circuit as shown in Figure 19 includes logic AND 22 OR 3 and 100 180 ...

Page 50: ...ng this scheme The targets Z1P Z1G will indicate either zone 1 trip and or Z1E trip operations The other functions such as Z2T Z3T ac trouble monitoring overcurrent supervision IT CIF unequal pole closing load pickup control load loss acceleration trip etc would remain the same as in the basic scheme 3ZNP For a remote internal fault Figure 22 either Z1P or Z1G will see the fault since they overrea...

Page 51: ...ose block RB functions RI1 used for reclose initiation on single pole trip RI2 used for reclose initiation on 3 pole trip RB used for reclose block The operation of RI1 RI2 and RB contacts is con trolled by the setting of the programmable reclose ini tiation logic as shown in Figure 24 The operation of either RI1 RI2 or RB must be confirmed by the signal of TRSL which is the trip output of MDAR RE...

Page 52: ...e initiation on single pole trip or pilot applica tions 9 14 POWER SWING BLOCK SUPERVISION OSB The Out of step blocking OSB logic in MDAR REL 300 is a dual blinder scheme It contains two blinder units providing 4 blinder lines The nature of the logic shown in Figure 25 is that the outer blinder 21BO must operate 50 ms or more ahead of the inner blinder 21BI in order for an OS condition to be ident...

Page 53: ...s operated and e pilot trip is performed when the pilot relay s operates and a pilot trip frequency signal from the remote end is received The basic operating principles of a simplified unblocking system are the same as the POTT sys tem except it is slightly different in application a The pilot channel is a frequent shift type power line carrier The transmitter frequency must be different at each ...

Page 54: ...TT The output signal from AND 35 will operate the reed relay SEND key the local transmitter and shift the transmit ting frequency from a guard to a trip for POTT scheme or from a blocking to an unblocking for Unblocking scheme to allow the remote pilot relay system to trip For security reasons the keying circuit is disabled by the time delay trip signal TDT includes Z2T Z3T CIFT AND GB which is no...

Page 55: ...ted phases Dependent on the direction of the load cur rent and the asymmetry of the breaker there can be a short pulse of load derived Io with possible trip ping direction polarity which provides an electrical forward torque to the ground directional relay There fore for security reason the setting of RBSW on MDAR REL 300 version 2 10 has been removed from the logic and the software some older ver...

Page 56: ...300 blocking scheme also uses I V and RDOG information to start the carrier The use of high speed I and V signals for carrier start pro vides more security to the scheme c Pilot channel is an ON OFF type power line carrier Transmitter frequency at each terminal can be the same d Channel is normally OFF until the carrier start unit s senses the fault and starts the transmit ter e Pilot trip is perf...

Page 57: ...ther terminals This keying circuit includes logic OR 50A AND 50 AND 173 OR 41 AND 51 OR 18 and AND 35 The signal of 52b to AND 35A is for dis abling the SEND circuit when the breaker is open and line side potential is used Since the present keying practice on a BLK system uses either contact open negative or positive removal keying or contact close positive keying approach a form C dry contact out...

Page 58: ...inal a The Z3P Z3G distance relays should be set for reverse looking and b the undervoltage units VAL VBL VCL should be used The basic operating principle of the weakfeed trip logic for the POTT and simplified unblocking scheme is as follows A Echo key for trip permission Figure 33 On internal faults the strong source end sends the trip or unblocking frequency signal to the weak end and its pilot ...

Page 59: ...pole trip SPT and single pole reclosing initiate RI1 on ØG faults Refer to Figure 38 for example on an AG fault the ØA ground distance ZA and IoM units operate This provides an output signal from OR 2 3 pole trip 3PT path of AND 68 is inhibited by the presence of no 3PTN signal to AND 68 since TTYP is set at either SPR or SR3R refer to system drawing 2687F04 sheet 1 SPT ØA occurs via AND 69 becaus...

Page 60: ...PT with three pole reclos ing initiate RI2 on all multi phase faults Refer to Figure 38 for example on an AB fault P3PT signal from AND 76 will trip 3 pole Three pole reclosing initiate RI2 will pick up if the TTYP is selected to 2PR 3PR or SR3R 10 2 9 Three pole trip occurs with or without three pole reclosing initiate on all faults if the func tional display trip mode selector TTYP is not select...

Page 61: ...k of the Westinghouse Electric Corporation Inc which stands for INtegrated COMmunications the local setting by showing SET REM in the metering mode Then the setting cannot be changed locally In this situation the only way to change a setting locally would be to turn the dc power OFF and then ON The computer will allow for a local setting change within 15 minutes IMAC an optional separate unit stan...

Page 62: ...CILLOGRAPHIC RECORDS The oscillographic record has 8 samples per cycle 1 cycle pre trigger and 7 cycles post trigger It includes 7 analog and 24 digital intermediate targets test points for each of the 16 oscillographic records The records are stored in a temporary memory and will be lost when the relay is deenergized The data can be accessed via the communication port only The oscillographic data...

Page 63: ... A the RDOG disables the PLTG FDOG trip key function via OR 9A AND 45A AND 30 and AND 45 At terminal B it will receive no car rier signal for permissive trip The reverse block logic also provides the conventional TBM feature to pre vent false operation on power reversal It should be noted that a block the block logic is also included in the circuit as shown in Figure 36 The block the block logic i...

Page 64: ...ion is identified if the current pha sor leads the voltage phasor The pair of current and voltage phasors which are compared are IA and VBA FDOPA IB and VCB FDOPB IC and VAC FDOPC 12 7 PROGRAMMABLE RECLOSING INITIATION WITH LOGIC FOR RB ON BF SQUELCH 12 8 COMMUNICATION REFER TO CHAP TER XI FOR DETAIL 12 9 UNIQUE OSB AND SPT LOGIC TO MEET THE POWER SYSTEM OPERATION PRAC TICES IN CHINA ...

Page 65: ...ction is not needed c Zone 2 distance units settings Generally Zone 2 reach is set to underreach the shortest adjacent line off the remote bus A practical setting is set for 100 of the pro tected line plus 50 of the shortest adjacent line off the remote bus For this example if the shortest adjacent line primary impedance is 20 ohms then the Zone 2 reach setting would be Z2P 6 20 x 0 5 x 240 600 10...

Page 66: ... medium set phase overcurrent unit can be set to IM 4 5 Set MDAR REL 300 IM 4 5 3 The low set ground overcurrent unit is used for supervising the reverse direc tional ground overcurrent unit RDOG It should be set as sensitive as possible A setting of 0 5 amperes is recommended IOS 0 5 Set MDAR REL 300 IOS 0 5 4 The medium set ground overcurrent unit is used for supervising the Zone 1 Zone 2 Zone 3...

Page 67: ...able swings will not involve an angular separation between generator voltages in excess of 120 This would give an approximate maximum of Zinner ZA ZL ZB 2x1 73 0 288 ZA ZL ZB pri ohms Zinner 0 288 ZA ZL ZB RC RV sec ohms 2 Where ZB is the max equivalent source imped ance at the end of the line away from ZA An inner blinder setting between the extreme of equations 1 and 2 may be used This pro vides...

Page 68: ...lications 3 GCT is the time delay setting of the GB unit As shown in the relay time current performance curves not included in this write up please refer to I L There are 63 setting selection from 1 to 63 in 1 0 steps In general the time delay setting should be coordinated with any protective device downstream of the line section 4 GDIR is the setting for directional control selection The GB unit ...

Page 69: ...nnel time includes the transmit ter and receiver times and the times which occur between these devices e g wave propagation interfacing relays etc For MDAR REL 300 the fastest 21P 21NP pickup time 14 ms the slowest carrier start time 4 ms and suggested margin time 2 ms For example the MDAR REL 300 chan nel coordination timer can be deter mined as below for a channel time of 3 ms Tc 4 3 2 14 i e Se...

Page 70: ...ibility for 5 ampere or 1 ampere rated current transformer selection For example select and set the CTYP 5 if a 5 ampere current transformer is used For this example Set MDAR REL 300 CTYP 5 The setting of CTYP affects all the distance unit and over current unit setting ranges The ranges will be automatically changed as listed in Table 1 5 The read primary setting RP should be set at YES if all the...

Page 71: ... in non pilot MDAR REL 300 There are five selections 3ZNP Z1E POTT permissive overreach transfer trip or Unblock ing PUTT permissive underreach transfer trip and BLK blocking in pilot MDAR REL 300 version 2 60 It should be selected and set to the one which is desired For example Set MDAR REL 300 STYP BLK 13 For pilot MDAR REL 300 only the WFEN weakfeed enable setting should be selected to YES for ...

Page 72: ...ETR to YES if remote setting is required For example Set MDAR REL 300 SETR YES 23 Procedure to set the real time clock With MDAR REL 300 at the setting mode scroll the function field to TIME and set the value to YES Depress function pushbutton RAISE to display YEAR MNTH month DAY WDAY week day HOUR and MIN minute and set the corresponding number via the value field The MDAR REL 300 clock will star...

Page 73: ...e Check the FREQ setting to match the line frequency and ct type CTYP Apply a balanced 3 phase voltage 70 Vac the Alarm 1 relay should be energized Terminals TB4 7 and 8 should be zero ohms Step 2 Check RELAY IN SERVICE LED it should be ON Step 3 Press RESET TARGETS push button the green LED Volts Amps Angle should be ON Step 4 Using a dc voltmeter measure the dc volt ages on the front panel displ...

Page 74: ...e X to a value between 0 and 150 and calcu late the value of I See Table 4 3 for a description of the following dis played fault data for Fault Type FTYP Targets BK1 Z1G I VLN Z1GCOS PANG X 1 ZR 1 3 Fault Voltages VA VB VC 3V0 and Currents IA IB IC 3I0 With the external jumper connected between TB1 13 and TB1 14 the BFIA 1 BFIA 2 should be closed The GS contact will be ON for approximately 50 ms w...

Page 75: ...RU if OSB option is included should be at maximum 15 ohms Refer to OSB test for detailed information Set TTYP 3PR Repeat test RI2 1 and RI2 2 should be closed For TTYP OFF or 1PR or 2PR repeat the test RI2 1 and RI2 2 should be open 1 1 5 Zone 1 Test Phase To Phase Step 13 Two methods can be used for this test 30 2 3 4 5 ej85 1 3 4 5 3 ej40 30 3 85 j 3 sin 85 4 5 cos 40 j4 5 sin 40 cos 4 31 57 76 ...

Page 76: ... 10 above the calculated value Repeat Step 10 The RI2 contacts 1 and 2 should be closed and the RB contacts 1 and 2 should be open Reset Z2RI to NO Repeat Step 10 again The RI2 contacts 1 and 2 should be open and the RB contacts 1 and 2 should be closed Change the settings of T2G and T2P to BLK Zone 2 should not be tripped for any type of fault 1 1 7 Zone 3 Tests Step 17 Press the DISPLAY SELECT p...

Page 77: ...wn in Step 1 1 5 The MDAR should trip at Iab 10 Amps 5 with a target of ITP AB Apply a 15A reversed fault current i e Ia leads Vab by 135 for Y con nection or 105 for T connection The relay should not trip 1 1 9 Ground Backup GB Test Step 23 Use the SETTINGS mode and change the following settings ITP OUT ITG OUT GBCV CO 8 GBPU 5 GDIR NO example to calculate and determine trip currents set the rela...

Page 78: ...shown in preceding Step 10 Fig ure A 1 The relay should trip at the following angles 28 60 88 148 The relay should not trip at the angles of 32 120 88 152 For a Negative Sequence Directional Unit DIRU NSEQ the tripping direction of MDAR is I2 leads V2 by a value between 8 and 188 The relay should trip at the following angles 3 82 85 167 The relay should not trip at the angles of 13 98 85 183 Step ...

Page 79: ...n of set ting LOPB Yes but Zone 1 2 3 and pi lot distance units will be blocked and all overcurrent units GB ITP and ITG will be converted to non directional opera tion LOPB will be set if the following logic is satisfied one or more input voltages VAN VBN or VCN are detected as 7 Vrms without I change or a 3Vo 7Vrms is detected with 3Io Ios Apply VAN VBN and VCN rated voltage to MDAR Scroll the L...

Page 80: ...is pressed The following contacts can be tested TRIP BFI RI1 optional RI2 RB AL1 with three balanced voltages applied AL2 GS SEND STOP Remove JMP5 and replace it on JMP12 Step 36 This completes the basic Acceptance Test for the MDAR Non Pilot system See sub sequent segment for optional Single Pole Trip and Out of Step Block tests 1 2 PILOT PERFORMANCE TESTS To prepare the MDAR relay assembly for P...

Page 81: ...etting ac curacy 6 ohms the forward directional ground unit must be disabled Set FDGT BLK Apply a rated voltage to RCVR 1 terminals TB5 7 and TB5 8 and apply an AG fault as shown in Step 10 of the Non Pilot Acceptance Test The trip contact A should be closed at the input Ia 3A 5 the target should show PLTG AG and the CARRY SEND contact should be closed for POTT setting Do not test carry STOP for P...

Page 82: ...sed as XTRIPC a Set IM 5 and SPTT 6 Apply a rated dc volt age to XTRIPA terminals Apply an AG fault with Ia 4 5 amps and Va 30 volts as shown in Ap pendix Section 1 1 3 step 10 The relay should trip in 5 seconds with a display of 62T b Repeat a but for XTRIPB terminals and BG fault c Repeat a but for XTRIPC terminals and CG fault 1 3 3 SPTT Timer Test Step 4 Set SPTT 4 Repeat the test of step 3 a ...

Page 83: ...ate 1 State 2 State 3 Va 70 0 Va 40 0 Va 40 0 Vb 70 120 Vb 40 120 Vb 40 120 Vc 70 120 Vc 40 120 Vc 40 120 Ia 1 0 Ia 3 5 45 Ia 6 45 Ib 1 120 Ib 3 5 165 Ib 6 165 Ic 1 120 Ic 3 5 75 Ic 6 75 T1 50 cycles T2 4 cycles T3 36 cycles T1 T2 and T3 are the duration time of state 1 2 and 3 respectively Set the timer start at state 3 The relay should trip in 500 ms with a target of Z1P ABC b Change T3 from 36 ...

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Page 85: ...e and then pressing the ENTER button Step 4 Press the RESET pushbutton LED jumps to Metering mode Apply 3 0 A to IA with an angle of 75 Read IA from the front display it should be 3 0 75 with an error of 5 and 2 Move the input current from IA to IB or IC terminal Read IB or IC to verify the transformer s accuracy 2 1 2 Impedance Accuracy Check Step 5 Apply voltages to MDAR as follows VA 30 0 VB 70...

Page 86: ... Remove JMP 5 and place it on JMP12 2 2 Pilot Maintenance Test Connect the MDAR per Figure A 1 Configuration 1 2 2 1 Basic Function Test Step 1 Repeat Step 1 thru 10 in the Non Pilot Maintenance Test 2 1 1 thru 2 1 5 2 2 2 Input Opto Coupler Check Step 2 PLT ENA Terminals Change the following settings from Table A 1 PLT YES Z1P 0UT Z1G OUT PLTP OUT PLTG 6 0 Z3P OUT Z3G 6 0 T3P BLK T3G BLK Z3FR REV...

Page 87: ...p 2 Repeat Non Pilot Maintenance test step 5 for trip and BFI Check the contact closures for Trip A BFIA AG fault Trip B BFIB BG fault and Trip C BFIC CG fault 2 3 2 Input Opto Coupler Check NOTE Before applying any voltages check the jumper positions on the Interconnect module The JMP7 and JMP9 should be IN for the XTRIPB application Step 3 XTRIPA Terminals a Set IM 5 and SPTT 6 Apply a rated dc ...

Page 88: ...I L 40 385 5 A 16 Figure A 1 Test Connection for Single Phase to Ground Faults Sheet 1 of 4 1502B51 Sub 1 ...

Page 89: ...I L 40 385 5 A 17 Figure A 2 Test Connection for Three Phase Faults 1502B51 Sub 1 Sheet 2 of 4 ...

Page 90: ...I L 40 385 5 A 18 Figure A 3 Test Connection for Phase to Phase Faults 1502B51 Sub 1 Sheet 3 of 4 ...

Page 91: ...I L 40 385 5 A 19 1502B51 Sub 1 Sheet 4 of 4 Figure A 4 Test Connection for Dual Polarizing Ground Directional Unit ...

Page 92: ... 2 3 4 5 6 7 8 9 10 11 12 13 14 R Z2 20 75 Z1 10 75 jX RT RU Z 17 3 45 I 2 35 Amps ZU 16 45 I 2 5 Amps Z 8 7 45 I 4 7 Amps ZT 8 7 45 I 5 0 Amps 4 OHMS 8 OHMS INPUTS Va 40 0 Vb 40 120 Vc 40 120 SETTINGS PANG 75 GANG 75 ZR 3 ABC FAULT WITH FAULT ANGLE OF 45 75 45 Figure A 5 MDAR with Out of Step Block Option ...

Page 93: ...OSTM 500 RT 15 00 RU 15 00 DIRU ZSEQ GBCV OUT GBPU 5 GTC 24 GDIR YES CIF NO LLT NO LOPB NO LOIB NO AL2S NO SETR YES TIME NO For Single Pole Trip option only NOTE This MDAR settings table is for 60 Hz and 5A ct systems For 1A ct change PLT PLG Z1P Z1G Z2P Z2G Z3P Z3G RT RU by multiplying a factor of 5 and all current values men tioned in the text should be multiplied by a factor of 0 02 Curve T0 K ...

Page 94: ...B C A B C ABC NO A B C A B C 1PR AG RI2 A B C A B C AB NO A B C A B C ABC NO A B C A B C 2PR AG RI2 A B C A B C AB RI2 A B C A B C ABC NO A B C A B C 3PR AG RI2 A B C A B C BG RI2 A B C A B C CG RI2 A B C A B C AB RI2 A B C A B C ABC RI2 A B C A B C SPR AG RI1 A A BG RI1 B B CG RI1 C C ABC NO A B C A B C SR3R AG RI1 A A BG RI1 B B CG RI1 C C ABC RI2 A B C A B C ...

Page 95: ...PB JMP 8 10 For the trip alarm AL2 2 JMP 11 12 For MDAR with FT switches only MICROPROCESSOR Module JUMPER POSITION FUNCTION JMP 1 1 2 EEPROM 8kx8 JMP 2 2 3 Single pole trip option JMP 2 1 2 Three pole trip JMP 3 OUT Standard for Rotation ABC JMP 4 OUT No dropout time delay for trip contacts JMP 5 OUT Disable output contact test JMP 6 OUT Normal operation JMP 8 9 1 2 RAM 32kx8 JMP 10 11 12 IN OUT ...

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Page 97: ...I L 40 385 5 A 25 I L 40 385 5 A 25 I L 40 385 5 A 25 Figure 3 MDAR REL 300 Relay Assembly Figure 4 MDAR REL 300 Display Panel sub 2 2403F38 sub 6 9651A07 ...

Page 98: ...I L 40 385 5 A 26 I L 40 385 5 A 26 I L 40 385 5 A 26 Figure 5 MDAR REL 300 Relay Assembly sub 3 1502B21 ...

Page 99: ...I L 40 385 5 A 27 I L 40 385 5 A 27 I L 40 385 5 A 27 Figure 6 MDAR REL 300 Relay Backplane Board Terminals sub 1 1615C70 ...

Page 100: ...er Algorithm Mode Background Disturbance in V or I Operate Panel Interface Hardware Self Checks Fault Mode Fault Relaying Calculations Zone 1 and Pilot Zone Pilot Logic and Channel Control Y N Mode Background No Fault for 3 Cycles Y N Relaying Calculations Zone 2 Zone 3 Out of Step Blinders Inst Overcurrent Ground Backup Phase Selector Checks and Logic Non Pilot Trip Logic Loss of Potential and Lo...

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Page 103: ...I L 40 385 5 A 31 I L 40 385 5 A 31 I L 40 385 5 A 31 A Figure 12 Loss of Potential Logic B X F A B No Load Current RY RY S C X F2 A B RY RY S S X F1 50 sub 3 9655A82 ...

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Page 105: ...I L 40 385 5 A 33 I L 40 385 5 A 33 I L 40 385 5 A 33 Figure 15 MDAR REL 300 Zone 1 Trip Logic sub 1 9659A66 ...

Page 106: ...I L 40 385 5 A 34 I L 40 385 5 A 34 I L 40 385 5 A 34 Figure 16 MDAR REL 300 Zone 2 Trip Logic sub 1 9659A67 ...

Page 107: ...I L 40 385 5 A 35 I L 40 385 5 A 35 I L 40 385 5 A 35 Figure 17 MDAR REL 300 Zone 3 Trip Logic sub 1 1504B04 ...

Page 108: ...I L 40 385 5 A 36 I L 40 385 5 A 36 I L 40 385 5 A 36 Figure 18 MDAR REL 300 Highset Trip Logic Figure 19 MDAR REL 300 Close into Fault Trip sub 2 9659A68 sub 2 9655A84 ...

Page 109: ... 385 5 A 37 I L 40 385 5 A 37 I L 40 385 5 A 37 Figure 20 MDAR REL 300 Unequal Pole Closing Load Pickup Control sub 1 9658A87 Figure 21 MDAR REL 300 Inverse Time Overcurrent Ground Backup Logic sub 1 9655A81 ...

Page 110: ...I L 40 385 5 A 38 I L 40 385 5 A 38 I L 40 385 5 A 38 Figure 22 MDAR REL 300 Zone 1 Extension Scheme Figure Load Loss Accelerated Trip Logic sub 2 9656A33 sub 1 9654A16 ...

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Page 112: ...I L 40 385 5 A 40 I L 40 385 5 A 40 I L 40 385 5 A 40 Figure 25 Load Loss Accelerated Trip Logic sub 2 1504B29 ...

Page 113: ...I L 40 385 5 A 41 I L 40 385 5 A 41 I L 40 385 5 A 41 Figure 26 Pilot Trip Relay Figure 27 POTT Unblocking Pilot Trip Logic sub 2 9659A70 sub 1 9659A69 ...

Page 114: ...I L 40 385 5 A 42 I L 40 385 5 A 42 I L 40 385 5 A 42 Figure 28 Carrier Keying Receiving Logic in POTT Unblocking Schemes sub 3 1504B30 ...

Page 115: ...I L 40 385 5 A 43 I L 40 385 5 A 43 I L 40 385 5 A 43 Figure 29 PUTT Scheme Figure 30 Blocking System Logic sub 1 1504B31 sub 1 9659A71 ...

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Page 117: ...I L 40 385 5 A 45 I L 40 385 5 A 45 I L 40 385 5 A 45 Figure 34 FDOG Supplements PLTG for High Rg Faults Figure 33 Weakfeed Application sub 1 9659A72 sub 2 9655A86 ...

Page 118: ...I L 40 385 5 A 46 I L 40 385 5 A 46 I L 40 385 5 A 46 Figure 35 Power Reversal sub 1 9654A17 ...

Page 119: ...I L 40 385 5 A 47 I L 40 385 5 A 47 I L 40 385 5 A 47 Figure 36 Reverse Block Logic sub 1 9659A73 ...

Page 120: ...I L 40 385 5 A 48 I L 40 385 5 A 48 I L 40 385 5 A 48 Figure 37 Unequal Pole Closing on Fault sub 1 9654A29 ...

Page 121: ...I L 40 385 5 A 49 I L 40 385 5 A 49 I L 40 385 5 A 49 Figure 38 Simplified MDAR Version 2 60 SPT Logic sub 4 1504B32 ...

Page 122: ...I L 40 385 5 A 50 I L 40 385 5 A 50 I L 40 385 5 A 50 Figure 39 MDAR Block Diagram sub 1 1611C12 ...

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