SEL-787-2, -3, -4 Data Sheet
Schweitzer Engineering Laboratories, Inc.
4
➤
Synchronism Check/Station DC Battery Monitor.
Program the VS/VBAT voltage channel in the SEL-787-3S
model to perform a synchronism check across a circuit breaker or to monitor dc voltage levels of the substation
battery.
➤
Transformer Monitoring.
Measure accumulated through-fault levels with the transformer through-fault monitor.
Additionally, use the optional 4–20 mA or RTD thermal inputs to monitor ambient, load tap changer (LTC) tank, and
transformer oil temperatures.
➤
Operator Controls.
Take advantage of eight programmable front-panel pushbuttons, each with two programmable
tricolor LEDs, for various uses, such as easy trip and close control and status indication for all the breakers. Use the
operator control interface pushbuttons to easily implement local and remote operator control schemes using 32 local
and 32 remote control bits. Use SEL
OGIC
®
control equations and slide-in, configurable front-panel labels to change
the function and identification of target LEDs and operator control pushbuttons and LEDs.
➤
Integrated Web Server.
Log in to the built-in web server to view metering and monitoring data and to download
events. Use the web server to view relay settings and to perform relay firmware upgrades.
➤
Relay and Logic Settings Software.
Reduce engineering costs by using
AC
SEL
ERATOR
QuickSet
®
SEL-5030
Software for relay settings and logic programming and to simplify development of SEL
OGIC
control equations.
Verify proper CT polarity and phasing through use of the built-in phasor display.
➤
Metering and Reporting.
Use built-in metering functions to eliminate separately mounted metering devices.
Analyze Sequential Events Recorder (SER) reports and oscillographic event reports for rapid commissioning,
testing, and post-fault diagnostics. Unsolicited SER protocol allows station-wide collection of binary SER messages.
➤
Front-Panel HMI.
Navigate the relay HMI using a 2 x 16-character LCD or optional 5-inch, color, 800 x 480-pixel
touchscreen display.
➤
Additional Standard Features.
Further enhance your power system protection by taking advantage of several other
SEL-787 standard features in communication, monitoring, and support. Modbus RTU, Event Messenger support,
M
IRRORED
B
ITS
®
communications, as well as load profile and breaker wear monitoring all come standard with the
SEL-787. The relay also supports 12 additional external RTDs (SEL-2600 RTD Module), IRIG-B input, advanced
SEL
OGIC
control equations, 128 remote analogs, IEEE C.37.118-2005-compliant synchrophasor protocol,
configurable labels, and an SEL-2812 compatible ST fiber-optic serial port.
➤
Optional Features.
Communicate with a number of additional optional communications protocols and ports,
digital/analog I/O, and RTDs. Optional communications protocols include IEC 61850 Edition 2, Modbus TCP/IP,
Simple Network Time Protocol (SNTP), IEEE 1588-2008 firmware-based PTP, PRP for dual Ethernet models,
DNP3 LAN/WAN, DNP3 serial, and IEC 60870-5-103. Elective communications ports include EIA-232 or EIA-485
and single or dual, copper or fiber-optic Ethernet ports. Several digital/analog I/O options are available. These
include 4 AI/4 AO, 4 DI/4 DO, 8 DI, 8 DO, 3 DI/4 DO/1 AO, 4 DI/3 DO, and 14 DI. An optional 10 internal RTD
card is also available for the SEL-787 relay. Conformal coating for chemically harsh and/or high moisture
environments is also available as an option.
➤
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.
