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SEL-451 Data Sheet

Schweitzer Engineering Laboratories, Inc.

18

Restrict breaker tripping in excessive duty 
situations without additional relays.

Construct a compensated overvoltage element for 
open line overvoltage protection.

Hold momentary change-of-state conditions for 
SCADA polling.

Provide a combination of frequency or rate-of-
change-of-frequency functions.

                    

Relay-to-Relay Digital 
Communications (M

IRRORED

 B

ITS

)

The SEL patented M

IRRORED

 B

ITS

 technology provides 

bidirectional relay-to-relay digital communication 
(

Figure 24

). In the SEL-451, M

IRRORED

 B

ITS

 can oper-

ate simultaneously on any two serial ports for three-ter-
minal power system operation.

This bidirectional digital communication creates addi-
tional outputs (transmitted M

IRRORED

 B

ITS

) and 

additional inputs (received M

IRRORED

 B

ITS

) for each 

serial port operating in the M

IRRORED

 B

ITS

 communica-

tions mode. Communicated information can included 
digital, analog, and virtual terminal data. Virtual terminal 
allows operator access to remote bays through the local 
bay. These M

IRRORED

 B

ITS

 can be used to transfer informa-

tion between line terminals to enhance coordination and 
achieve faster tripping. M

IRRORED

 B

ITS

 also help reduce total 

pilot scheme operating time by eliminating the need to close 
output contacts and debounce contact outputs. Use the dual-
port M

IRRORED

 B

ITS

 communications capabilities for high-

speed communications-assisted schemes applied to three-ter-
minal transmission lines.

Communication

The SEL-451 offers the following serial communication 
features.

Four independent EIA-232 serial ports.

Full access to event history, relay status, and meter 
information.

Settings and group switching have three levels of 
password protection.

DNP3 Level 2 Outstation.

Patented SEL Fast Message Interleaving of ASCII 
and binary data for SCADA communications, 
including access to SER, relay element targets, 
event data and more.

Communication of synchronized phasor 
measurement data using either SEL Fast 
Messaging for Synchrophasors or IEEE C37.118–
2005 

Standard for Synchrophasors for Power 

Systems

.

                    

                    

Figure 23

Motor-Driven Reclose Timer

3rd Reclose

(Synchronism Check)

2nd Reclose

(Hot Bus/Dead Line)

1st Reclose

(Hot Line/Dead Bus)

Reset

Lockout

                    

Figure 24

Integral Communication Provides Secure Protection, Monitoring, and Control, as Well as Terminal Access to 

Both Relays Through One Connection

Fiber-Optic Cable

TX
RX

TX
RX

SEL-2815

SEL-2815

Other

Bays

Other

Bays

Bus 1

Bus 2

1

2

Digital, Analog, and Virtual Terminal Data

SEL-451

SEL-451

Summary of Contents for SEL-451-5

Page 1: ...rogrammable elements for local control remote control protection latching and automation latching Local metering on the large format front panel LCD eliminates the need for separate panel meters Serial and Ethernet links efficiently transmit key information including metering data protection element and control input output I O status IEEE C37 118 Synchrophasors IEC 61850 Edition 2 GOOSE messages ...

Page 2: ...ion of transfer tripping is included Sequential Events Recorder SER Record the last 1000 events including setting changes power ups and selectable logic elements Dual CT Input Apply with ring bus breaker and a half or other two breaker schemes Combine currents within the relay from two sets of CTs for protection functions but keep them separately available for monitoring and station integration ap...

Page 3: ... MET PMU SBM SER 4 EIA 232 2 Ethernet 1 16S EC 81O U SIP THM SIP THM Software Invertible Polarities IEC 60255 Compliant Thermal Model 32 O U Synchronism Check Over and Underpower Overcurrent Dual Breaker Failure Overcurrent Time Overcurrent Trip Close Pushbuttons Overvoltage Directional Overcurrent Autoreclosing Over and Underfrequency 32O U Access Security Serial Ethernet Best Choice Ground Break...

Page 4: ...ercurrent 67 Dual Circuit Breaker Failure 50 BF Synchronism Check 25 Instantaneous Overcurrent 50 Time Overcurrent 51 Over Undervoltage 27 59 Over Underpower 32 Frequency 81 Reclosing 79 Expanded SELOGIC Control Equations Event Reports and Oscillography Sequential Events Recorder SER Dual Breaker Condition Monitor Station Battery Monitor Fault Locator Load Encroachment Supervision TiDL Remote Data...

Page 5: ... drops below pickup for one cycle The other choice emulates the reset characteristic of an electromechanical induction disc relay Breaker Failure Protection Incorporated into the SEL 451 is a full function breaker failure system Current can be individually monitored in two breakers High speed open pole detection logic allows you to set the pickup current below minimum load for sensitivity without ...

Page 6: ...ts This allows col lecting separate current metering and breaker monitor information for each breaker Breaker monitoring func tions for two breakers are done within one relay Individ ual breaker currents allow for breaker failure functions on a per breaker basis within the SEL 451 Breaker diag nostics are reported on a comparative basis allowing for advanced proactive troubleshooting Custom Contro...

Page 7: ... or MIRRORED BITS to switch protection upon loss of one relay Bay Control The SEL 451 Bay Control provides dynamic bay one line diagrams on the front panel screen with disconnect and breaker control capabilities for numerous predefined user selectable bay types Additional user selectable bay types are available via a QuickSet interface that can be downloaded at selinc com The bay control is equipp...

Page 8: ...bels available in one line diagrams 14 17 18 and 23 All other one line diagrams use the Bay Name Busbar and Busbar Labels Breaker and Breaker Labels Disconnect Switches and Disconnect Switch Labels Analog Display Points Figure 10 shows the Breaker Control Screens available when the ENT pushbutton is pressed with the circuit breaker highlighted as shown in Figure 10 a After pressing the ENT pushbut...

Page 9: ... a disconnect is designated as status only the disconnect is displayed in the one line diagram of the relay front panel HMI but it is not select able when navigating the front panel HMI Three posi tion disconnects are also supported with control display functionality on a per position basis Rules Based Settings Editor QuickSet develops settings on or offline The system automatically checks interre...

Page 10: ...ram and a form with apparatus specific settings is displayed QuickSet Templates Use the fully licensed version of QuickSet to create custom views of settings called Application Designs to reduce complexity decrease the chance of errors and increase productivity Lock and hide unused settings Lock settings to match your standard for protection I O assignment communications and SELOGIC control equati...

Page 11: ...nt panel labels to change the function and identification of target LEDs and operator control pushbuttons and LEDs The blank slide in label set is included with the SEL 451 Label sets can be printed from a laser printer using templates supplied with the relay or hand labeled on supplied blank labels Figure 12 Factory Default Status and Trip Target LEDs 8 Pushbutton 16 Target Option Figure 13 Facto...

Page 12: ...front panel navigation buttons Auxiliary Trip Close Pushbuttons and Indicating LEDs Optional auxiliary trip and close pushbuttons see Figure 17 and indicating LEDs allow breaker control independent of the relay The auxiliary trip close push buttons are electrically separate from the relay operating even if the relay is powered down Make the extra con nections at terminals 201 through 208 See Figur...

Page 13: ...ickup dropout recloser state changes etc The relay SER stores the latest 1 000 entries Voltage Sag Swell Interruption Records The SEL 451 can perform automatic voltage disturbance monitoring for three phase systems The voltage sag swell interruption VSSI recorder uses the VSSI Relay Word bits to determine when to start trigger and when to stop recording The VSSI recorder uses nonvola tile memory s...

Page 14: ...rial port communications on the LCD and in the Event Report Use the event report data to see an oscillographic display of the battery voltage Monitor the substation battery voltage drops during trip close and other control operations Figure 19 Example PTP Network SEL 487B SEL 487E SEL 411L SEL 421 SEL 451 GPS SEL 2488 SEL 2740M Figure 20 SNTP Diagram SEL 2401 SEL 3354 SEL 2725 SEL 487E Table 3 Met...

Page 15: ...n Time Domain Link TiDL Technology The SEL 451 supports remote data acquisition through use of an SEL Axion with a technology known as TiDL The Axion provides remote analog and digital data over an IEC 61158 EtherCAT TiDL network This technology provides very low and deterministic 1 5 ms latency over a point to point architecture The SEL 451 can receive as many as eight fiber links from as many as...

Page 16: ...tching control points Program latch set and latch reset conditions with SELOGIC control equations Set or reset the latch control points via control inputs remote control points local control points or any programmable logic condition The latch control points retain states when the relay loses power Replace traditional indicating panel lights and switches with as many as 24 latching target LEDs and...

Page 17: ... and other functions Compressed ASCII Comma delimited ASCII data reports Allows external devices to obtain bay data in an appropriate format for direct import into spreadsheets and database programs Data are checksum protected Extended Fast Meter Fast Operate and Fast SER Binary protocol for machine to machine communication Quickly updates SEL 2032 Communications Processors RTUs and other substati...

Page 18: ...er tripping MIRRORED BITS also help reduce total pilot scheme operating time by eliminating the need to close output contacts and debounce contact outputs Use the dual port MIRRORED BITS communications capabilities for high speed communications assisted schemes applied to three ter minal transmission lines Communication The SEL 451 offers the following serial communication features Four independen...

Page 19: ...fer settings files to and from the relay via the high speed Ethernet port through use of FTP IEEE C37 118 Synchrophasors The latest IEEE Synchrophasor Protocol provides a stan dard method for communicating synchronized phasor measurement data over Ethernet or serial media The integrated Ethernet card in the SEL 451 provides two independent connections by using either TCP IP UDP IP or a combination...

Page 20: ...operating on 100 Mbps Ethernet Use the IEC 61850 Edition 2 Ethernet protocol for relay monitoring and control functions including the follow ing As many as 128 incoming GOOSE messages The incoming GOOSE messages can be used to control as many as 256 control bits and 256 analog quantities in the relay with 3 ms latency from device to device These messages provide binary control inputs to the relay ...

Page 21: ...tication from any client requesting to initi ate an MMS session The client request must be accom panied by the 2AC level password ACSELERATOR Architect Use ACSELERATOR Architect SEL 5032 Software to manage the logical node data for all IEC 68150 devices on the network This Windows based software provides easy to use displays for identifying and binding IEC 61850 network data between logical nodes ...

Page 22: ...es Inc 22 Diagrams and Dimensions Figure 27 Typical SEL 451 Front Panel Diagrams 3U Front Panel Rack Mount Option With Optional Bay Control Overlay 4U Front Panel Panel Mount Option 5U Front Panel Panel Mount Option With Auxiliary Trip Close Pushbuttons ...

Page 23: ...ories Inc SEL 451 Data Sheet 23 Figure 28 Typical 3U and 4U SEL 451 Rear Panel Diagrams 3U Rear Panel Main Board 4U Rear Panel Main Board Connectorized Option INT5 I O Board 4U Rear Panel Main Board INT1 I O Board LEA Voltage Inputs ...

Page 24: ...SEL 451 Data Sheet Schweitzer Engineering Laboratories Inc 24 Figure 29 Typical 5U SEL 451 Rear Panel Diagram Figure 30 Rear Panel With EtherCAT Board 5U Rear Panel Main Board With Two INT4 I O Boards ...

Page 25: ...Schweitzer Engineering Laboratories Inc SEL 451 Data Sheet 25 Horizontal Mounting Shown Dimensions Also Apply to Vertical Mounting Figure 31 SEL 451 Dimensions for Rack and Panel Mount Models ...

Page 26: ...nal 247 5 A One Second Thermal Rating 1 A Nominal 100 A 5 A Nominal 500 A One Cycle Thermal Rating 1 A Nominal 250 A peak 5 A Nominal 1250 A peak Burden Rating 1 A Nominal 0 1 VA 1 A 5 A Nominal 0 5 VA 5 A AC Voltage Inputs Three phase four wire wye connections are supported Rated Voltage Range 0 300 VL N Ten Second Thermal Rating 600 Vac Burden 0 1 VA 125 V LEA Voltage Inputs Rated Voltage Range ...

Page 27: ...eaker Resistive DC or AC Outputs With Arc Suppression Disabled Make 30 A per IEEE C37 90 2005 Carry 6 A continuous carry 1 s Rating 50 A MOV Protection 250 Vac 330 Vdc 130 J Breaking Capacity 10 000 Operations 48 V 0 50 A L R 40 ms 125 V 0 30 A L R 40 ms 250 V 0 20 A L R 40 ms High Interrupt DC Outputs With Arc Suppression Enabled Make 30 A per IEEE C37 90 2005 Carry 6 A continuous carry 1 s Ratin...

Page 28: ...to 85 C 40 to 185 F Note LCD contrast impaired for temperatures below 20 and above 70 C Stated temperature ranges not applicable to UL applications Humidity 5 to 95 without condensation Weight Maximum 3U Rack Unit 8 0 kg 17 7 lb 4U Rack Unit 9 8 kg 21 6 lb 5U Rack Unit 11 6 kg 25 6 lb Terminal Connections Rear Screw Terminal Tightening Torque 8 Ring Lug Minimum Maximum 1 0 Nm 9 in lb 2 0 Nm 18 in ...

Page 29: ...DE for Power Systems Event Reports Length 0 25 24 seconds based on LER and SRATE settings Volatile Memory 3 s of back to back event reports sampled at 8 kHz Nonvolatile Memory At least 4 event reports of a 3 s duration sampled at 8 kHz Resolution 8 or 4 samples cycle Event Summary Storage 100 summaries Breaker History Storage 128 histories Sequential Events Recorder Storage 1000 entries Trigger El...

Page 30: ...00 VLN Wye Pickup Accuracy Undervoltage Blocking 2 0 5 V Optional RTD Elements Models Compatible With SEL 2600 Series RTD Module 12 RTD Inputs via SEL 2600 Series RTD Module and SEL 2800 Fiber Optic Transceiver Monitor Ambient or Other Temperatures PT 100 NI 100 NI 120 and CU 10 RTD Types Supported Field Selectable Pickup Range Off 50 to 250 C 1 C step Accuracy 2 C As long as 500 m Fiber Optic Cab...

Page 31: ... 0 5 0 2 8 00 V Frequency Input 40 65 Hz Accuracy 0 01 Hz Power MW P Per Phase Wye 3 Wye or Delta Per Terminal 1 0 1 1 2 INOM 33 5 300 Vac PF 1 0 5 lead lag 1 0 7 0 1 1 2 INOM 33 5 300 Vac PF 1 0 5 lead lag 3 MVAr Q Per Phase Wye 3 Wye or Delta Per Terminal 1 0 1 1 2 INOM 33 5 300 Vac PF 0 0 5 lead lag 1 0 7 0 1 1 2 INOM 33 5 300 Vac PF 0 0 5 lead lag 3 MVA S Per Phase Wye 3 Wye or Delta Per Termi...

Page 32: ...products including without lim itation software firmware and documentation The information in this document is provided for informational use only and is subject to change without notice Schweitzer Engineering Laboratories Inc has approved only the English language document This product is covered by the standard SEL 10 year warranty For warranty details visit selinc com or contact your customer s...

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