Schweitzer Engineering Laboratories SEL-787-2 Manual
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Schweitzer Engineering Laboratories SEL-787-2 Manual

Transformer protection relays
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SEL-787-2, -3, -4 Transformer
Protection Relays
As Many as Four-Terminal Differential and REF Protection
New Features
➤
Disconnect control from the Bay Screens application.
➤
Three-position disconnects for increased safety.
➤
A built-in web server that simplifies access to relay data and supports firmware upgrade.
➤
Faster firmware downloads via the Ethernet port.
➤
IEEE 1588-2008 firmware-based Precision Time Protocol (PTP) provides ease of integration.
➤
EtherNet/IP provides ease of integration for industrial automation applications.
➤
IEC 61850 Test Mode support with standard operating modes On, Blocked, Test, Test/Blocked, and Off for easy
commissioning.
Schweitzer Engineering Laboratories, Inc.
SEL-787-2, -3, -4 Data Sheet

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Summary of Contents for Schweitzer Engineering Laboratories SEL-787-2

  • Page 1 IEEE 1588-2008 firmware-based Precision Time Protocol (PTP) provides ease of integration. ➤ EtherNet/IP provides ease of integration for industrial automation applications. ➤ IEC 61850 Test Mode support with standard operating modes On, Blocked, Test, Test/Blocked, and Off for easy commissioning. Schweitzer Engineering Laboratories, Inc. SEL-787-2, -3, -4 Data Sheet...
  • Page 2 SEL-787-21 Phase Differential Restricted Earth Fault (REF) Phase Overcurrent Neg.-Seq. Overcurrent Ground Overcurrent Neutral Overcurrent Phase Time-Overcurrent Neg.-Seq. Time-Overcurrent Ground Time-Overcurrent 51PC Combined Winding Phase Time-Overcurrent 51GC Combined Winding Ground Time-Overcurrent SEL-787-2, -3, -4 Data Sheet Schweitzer Engineering Laboratories, Inc.
  • Page 3 15 to 70 Hz for generator step-up and variable frequency applications. Use over- and underfrequency and over- and undervoltage elements to implement load shedding and other control schemes on the relay. Schweitzer Engineering Laboratories, Inc. SEL-787-2, -3, -4 Data Sheet...
  • Page 4 Language Support. Choose English or Spanish for your serial ports, including the front-panel serial port. The standard relay front-panel overlay is in English; a Spanish overlay is available as an ordering option. SEL-787-2, -3, -4 Data Sheet Schweitzer Engineering Laboratories, Inc.

  • Page 5: Functional Overview

    • Front-Panel HMI With 2 x 16-Character LCD Inputs/Outputs, and RTD Inputs • 5-Inch, Color, 800 x 480-Pixel Touchscreen Display* • Single or Dual Ethernet Copper or Fiber-Optic Optional Functions Communications Port* Figure 1 SEL-787-3E Functional Diagram Schweitzer Engineering Laboratories, Inc. SEL-787-2, -3, -4 Data Sheet...
  • Page 6 • Front-Panel HMI With 2 x 16-Character LCD Analog Inputs/Outputs, and RTD Inputs • 5-Inch, Color, 800 x 480-Pixel Touchscreen Display* • Single or Dual Ethernet Copper or Fiber-Optic Optional Functions Communications Port* Figure 2 SEL-787-3S Functional Diagram SEL-787-2, -3, -4 Data Sheet Schweitzer Engineering Laboratories, Inc.
  • Page 7 • Front-Panel HMI With 2 x 16-Character LCD Inputs/Outputs, and RTD Inputs • 5-Inch, Color, 800 x 480-Pixel Touchscreen Display* • Single or Dual Ethernet Copper or Fiber-Optic Optional Functions Communications Port* Figure 3 SEL-787-4X Functional Diagram Schweitzer Engineering Laboratories, Inc. SEL-787-2, -3, -4 Data Sheet...
  • Page 8 • Front-Panel HMI With 2 x 16-Character LCD Inputs/Outputs, and RTD Inputs • 5-Inch, Color, 800 x 480-Pixel Touchscreen Display* • Single or Dual Ethernet Copper or Fiber-Optic Optional Functions Communications Port* Figure 4 SEL-787-2E/21/2X Functional Diagram SEL-787-2, -3, -4 Data Sheet Schweitzer Engineering Laboratories, Inc.

  • Page 9: Protection Features

    ➤ Two residual instantaneous overcurrent (50G) ele- conditions. Set second-, fourth-, and fifth-harmonic ments per winding that operate on the calculated thresholds independently. residual (3I0) current. Schweitzer Engineering Laboratories, Inc. SEL-787-2, -3, -4 Data Sheet...

  • Page 10: Time-Overcurrent Elements

    You can set the relay element to rents. operate as an inverse-time element; a user-defined curve element; a composite element with an inverse-time SEL-787-2, -3, -4 Data Sheet Schweitzer Engineering Laboratories, Inc.

  • Page 11: Over- And Undervoltage Protection

    The SEL-787 with optional voltage inputs uses the positive-sequence voltage determine system frequency. All frequency elements are disabled if the positive-sequence voltage is less than the minimum voltage threshold. Schweitzer Engineering Laboratories, Inc. SEL-787-2, -3, -4 Data Sheet...

  • Page 12: Operator Controls

    This allows you to press the CLOSE or TRIP pushbutton, AUX1 AUX2 then move to an alternate location before the breaker command is executed. Figure 9 Operator Controls (787-3E/3S Models) SEL-787-2, -3, -4 Data Sheet Schweitzer Engineering Laboratories, Inc.

  • Page 13: Built-In Web Server

    Use the PC interface to remotely retrieve power sys- ➤ Organize settings with the relay database manager. tem data. ➤ Load and retrieve settings using a simple PC commu- nications link. Schweitzer Engineering Laboratories, Inc. SEL-787-2, -3, -4 Data Sheet...

  • Page 14: Metering And Monitoring

    As shown in Table 5, metered metered quantities in primary quantities (current in quantities include phase voltages and currents; neutral A primary and voltage in V primary). current; sequence voltages and currents; harmonics, SEL-787-2, -3, -4 Data Sheet Schweitzer Engineering Laboratories, Inc.

  • Page 15: Load Profile

    (see Figure 15). Synchronized Phasor Measurement Combine the SEL-787 with an SEL IRIG-B time source to measure the system angle in real time with a timing Schweitzer Engineering Laboratories, Inc. SEL-787-2, -3, -4 Data Sheet...
  • Page 16 Figure 17 Visualization of Phase Angle Measurements ➤ Advance system knowledge with correlated event Across a Power System reporting and real-time system visualization. ➤ Validate planning studies to improve system load bal- ance and station optimization. SEL-787-2, -3, -4 Data Sheet Schweitzer Engineering Laboratories, Inc.

  • Page 17: Through-Fault Monitoring

    Figure 19 Breaker Contact Wear Curve and Settings Specifications. Through-Fault Monitoring A through fault is an overcurrent event external to the differential protection zone. While a through fault is not Schweitzer Engineering Laboratories, Inc. SEL-787-2, -3, -4 Data Sheet...

  • Page 18: Touchscreen Display

    The bay configura- tion can be displayed as an SLD on the touchscreen. You can create as many as 5 bay screens with as many as 4 controllable breakers, 16 controllable 2-position SEL-787-2, -3, -4 Data Sheet Schweitzer Engineering Laboratories, Inc.
  • Page 19 Energy, Max/Min, Demand, and Peak Demand applications. Tap the Reset button (see Figure 23) to navigate to the reset confirmation screen. Once you confirm the reset, the data are reset to zero. Figure 25 Event Summary Schweitzer Engineering Laboratories, Inc. SEL-787-2, -3, -4 Data Sheet...
  • Page 20 (Figure 27), and control the local bits (Figure 28). Figure 30 Trip and Diagnostics Figure 27 Digital Output Pulsing–Slot A Figure 28 Local Bits SEL-787-2, -3, -4 Data Sheet Schweitzer Engineering Laboratories, Inc.
  • Page 21 IEC 62439-3. IEC 60870-5-103 Serial communications protocol–international standard for interoperability between intelligent devices in a substation. EtherNet/IP Ethernet-based protocol that provides access to metering data, protection elements, targets, and contact I/O. Schweitzer Engineering Laboratories, Inc. SEL-787-2, -3, -4 Data Sheet...
  • Page 22 Replace traditional indicating panel lights with 32 equations. Remote analogs can also be modified via programmable displays. Define custom messages Modbus, DNP3, and IEC 61850. (e.g., ) to report Breaker Open Breaker Closed SEL-787-2, -3, -4 Data Sheet Schweitzer Engineering Laboratories, Inc.
  • Page 23 Fiber-optic Ethernet cables with LC connectors (SEL-C808) for fiber-optic Ethernet ports SEL-787 SEL-787 Set Port 1 (Ethernet) settings in each relay. Figure 34 Ethernet Network Configuration With Ring Structure (Switched Mode) Schweitzer Engineering Laboratories, Inc. SEL-787-2, -3, -4 Data Sheet...

  • Page 24: Additional Features

    Figure 38. Some front-panel relabeling of LEDs may be needed if you reprogram them for unique or specific applications—see Configurable Labels. SEL-787-2, -3, -4 Data Sheet Schweitzer Engineering Laboratories, Inc.

  • Page 25: Relay Dimensions

    Relay Dimensions 7.36 (187.0) 5.47 (139.0) i9089b Figure 36 SEL-787 Dimensions for Rack- and Panel-Mount Models Schweitzer Engineering Laboratories, Inc. SEL-787-2, -3, -4 Data Sheet...

  • Page 26: Hardware Overview

    IBW3 ICW3 VA VB IAW1 IBW1 ICW1 IAW2 IBW2 ICW2 E01 E02 E03 E04 E11 E12 Z01 Z02 Z03 Z06 Z07 Z08 Z09 Z10 Z11 Z12 Figure 37 SEL-787-3E Wiring Diagram SEL-787-2, -3, -4 Data Sheet Schweitzer Engineering Laboratories, Inc.
  • Page 27 Figure 38 Front Panel With Default Configurable Labels SEL-787-4X Rear and Side Panels (A) Rear-Panel Layout (B) Side-Panel Layout Figure 39 SEL-787-4X With Single Copper Ethernet, 8 DI, and RTD Option Schweitzer Engineering Laboratories, Inc. SEL-787-2, -3, -4 Data Sheet...
  • Page 28 Figure 40 Front Panel With Default Configurable Labels SEL-787-3E Rear and Side Panels (A) Rear-Panel Layout (B) Side-Panel Layout Figure 41 SEL-787-3E With Dual-Fiber Ethernet, EIA-232 Communication, 3 DI/4 DO/1 AO Option SEL-787-2, -3, -4 Data Sheet Schweitzer Engineering Laboratories, Inc.
  • Page 29 BRKR2 CLOSE INST OC CLOSED/OPEN Volts/Hertz Trip BREAKER OPENING AUX 2 TRIP O/U VOLT O/U FREQ AUX 3 AUX 1 V/Hz PORT F Figure 43 Front Panel With Default Configurable Labels Schweitzer Engineering Laboratories, Inc. SEL-787-2, -3, -4 Data Sheet...
  • Page 30 C-phase of Winding 3, along with the RTD thermal month, or year) and impact of external faults on the elements, to provide fan bank control and protection. Use transformer. additional RTD thermal elements to monitor LTC tank SEL-787-2, -3, -4 Data Sheet Schweitzer Engineering Laboratories, Inc.
  • Page 31 Note: The CT secondary circuit should be grounded in the relay cabinet. Figure 45 SEL-787-4X Provides 3-Winding Transformer Differential Protection, REF Protection, Overcurrent Protection, and Fan Bank Control With LTC Monitoring Schweitzer Engineering Laboratories, Inc. SEL-787-2, -3, -4 Data Sheet...
  • Page 32 138 kV SEL-787-3E Relay 250/5 A Note: The CT secondary circuit should be grounded in the relay cabinet. Figure 46 SEL-787-3E Provides Auto-Transformer Differential Protection, REF Protection, Overcurrent Protection, and Voltage-Based Protection SEL-787-2, -3, -4 Data Sheet Schweitzer Engineering Laboratories, Inc.
  • Page 33 Figure 47 Typical DC Control Connection Diagram for the Three Terminal Applications Schweitzer Engineering Laboratories, Inc. SEL-787-2, -3, -4 Data Sheet...

  • Page 34: Specifications

    100–250 V (if DELTA_Y := DELTA) Range: 100–440 V (if DELTA_Y := WYE) Contact Protection: 360 Vdc, 115 J MOV protection across open contacts Rated Continuous Voltage: 300 Vac 10-Second Thermal: 600 Vac SEL-787-2, -3, -4 Data Sheet Schweitzer Engineering Laboratories, Inc.
  • Page 35 Without user calibration: Better than 0.5% of full scale at 25°C 125 Vdc 10.0 A L/R = 40 ms 250 Vdc 10.0 A L/R = 20 ms Accuracy Variation With ±0.015% per °C of full-scale Temperature: (±20 mA or ±10 V) Schweitzer Engineering Laboratories, Inc. SEL-787-2, -3, -4 Data Sheet...

  • Page 36: Product Standards

    Fiber Size: 62.5/125 µm Approximate Range: ~1 km Product Standards Data Rate: 5 Mbps Electromagnetic IEC 60255-26:2013 Typical Fiber Attenuation: –4 dB/km Compatibility: IEC 60255-27:2013 UL 508 CSA C22.2 No. 14-05 SEL-787-2, -3, -4 Data Sheet Schweitzer Engineering Laboratories, Inc.
  • Page 37 0.5 J, 530 V on analog outputs CISPR 11:2009 + A1:2010 Class A IEEE C37.90:2005 CISPR 22:2008 Class A Severity Level: 0.5 J, 5 kV CISPR 32:2015 Class A 0.5 J, 530 V on analog outputs Schweitzer Engineering Laboratories, Inc. SEL-787-2, -3, -4 Data Sheet...

  • Page 38: Relay Elements

    <1.5 cycle 1 A Model: 0.10–3.20 A, 0.01 A steps Time Delay: 0.00–120.00 seconds, 0.01-second steps Accuracy: ±5% of setting plus ±0.02 • I secondary (steady-state pickup) Accuracy: ±0.5% plus ±0.25 cycle SEL-787-2, -3, -4 Data Sheet Schweitzer Engineering Laboratories, Inc.

  • Page 39: Metering Accuracy

    Magnitude Accuracy: ±1.0% (I = 1 A or 5 A) Phase Accuracy: ±1.0(I = 5 A), ±1.0 at 0.5–20.0 times I = 1 A), ±2.5 at 0.2–0.5 times I = 1 A) Schweitzer Engineering Laboratories, Inc. SEL-787-2, -3, -4 Data Sheet...
  • Page 40 SEL products appearing in this document may be covered by U.S. and Foreign selinc.com • info@selinc.com patents. Schweitzer Engineering Laboratories, Inc. reserves all rights and benefits afforded under federal and international copyright and patent laws in its products, including without lim- itation software, firmware, and documentation.

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