Sel 751A, Instruction Manual

Page: 28 / 640

1.12
SEL-751A Relay Instruction Manual Date Code 20100129
Introduction and Specifications
Models, Options, and Accessories
➢
Power Factor (55)
➢
Loss of Potential (60LOP)
➤
Rate-of-Change of Frequency (81R)
➤
Arc-Flash Protection
➤
Demand and Peak Demand Metering
➤
Synchronism Check (25)
➢
Synchronism Check Undervoltage (27S)
➢
Synchronism Check Overvoltage (59S)
➤
Station DC Battery Monitor
➤
RTD-Based Protection: As many as ten (10) RTDs may be
monitored when an internal RTD card is used, or as many as
twelve (12) when an external SEL-2600 RTD Module is used.
There are separate Trip and Warn settings for each RTD.
Monitoring Features
➤
Event Summaries that contain relay ID, date and time, trip
cause, and current/voltage magnitudes
➤
Event Reports including filtered and raw analog data
➤
Sequential Events Record (SER)
➤
Compatibility with SEL-3010 Event Messenger
➤
A complete suite of accurate metering functions
Communications and
Control
➤
EIA-232, front-panel port
➤
EIA-232, EIA-485, single or dual, copper or fiber-optic
Ethernet, and fiber-optic rear panel EIA-232 ports.
➤
IRIG-B time-code input
➤
Modbus
®
RTU slave, Modbus TCP/IP, DNP3 serial, DNP3
LAN/WAN, Ethernet FTP, Telnet, M
IRRORED
B
ITS®
, IEC
61850, DeviceNet, File Transfer Protocols, and
Synchrophasors with C37.118 Protocol
➤
SEL ASCII, Compressed ASCII, Fast Meter, Fast Operate, Fast
SER, and Fast Message Protocols
➤
Programmable Boolean and math operators, logic functions,
and analog compare
Models, Options, and Accessories
Models
Complete ordering information is not provided in this instruction manual. See
the latest SEL-751A Model Option Table at
www.selinc.com , under SEL
Literature, Ordering Information (Model Option Tables). Options and
accessories are listed below.
SEL-751A Base Unit
➤
Front panel with large LCD display
➢
Four programmable pushbuttons with eight LEDs
➢
Eight target LEDs (six programmable)