1.13
Date Code 20100129
Instruction Manual
SEL-751A Relay
Introduction and Specifications
Models, Options, and Accessories
➢
Operator control interface
➢
EIA-232 port
➤
Power supply card with two digital inputs and three digital
outputs (Slot
A
)
➤
Processor and communications card (Slot
B
)
➢
EIA-232 serial port with IRIG-B time code input
➤
Three expansion slots for optional cards (Slots
C
,
D
,
E
)
➤
Four ac current inputs card (Slot
Z
)
➤
Protocols
➢
Modbus
®
RTU
➢
SEL ASCII and Compressed ASCII
➢
SEL Fast Meter, Fast Operate, Fast SER, Fast Message
➢
Ymodem File Transfer
➢
SEL M
IRRORED
B
ITS®
➢
Event Messenger
®
➢
Synchrophasors with C37.118
➤
Breaker Wear Monitoring
Options
➤
Firmware option
➢
Autoreclosing Control
➤
Voltage Options (see
➤
Input/Output (I/O) Option
➢
Additional digital I/O
➢
Additional analog I/O
➢
10 RTD inputs
➤
Communications Options (Protocol/Ports)
➢
EIA-485/EIA-232/Ethernet ports (single/dual, copper
or fiber-optic)
➢
Multimode (ST
®
) fiber-optic serial port
➢
Modbus TCP/IP protocol
➢
DeviceNet
➢
IEC 61850 Communications
➢
DNP3 serial and LAN/WAN
Table 1.1
Voltage Input Options
(Sheet 1 of 2)
Voltage Input Options
Option (71)
SEL
ECT
3AVI
a
Option (72)
SEL
ECT
5AVI
b
Option (73)
SEL
ECT
5AVI
c
Option (74)
SEL
ECT
3 AVI/
4 AFDI
d
Under- and overvoltage
elements (27, 59)
x
x
x
x
Voltage based frequency
measurement and track-
ing
x
x
x
x
Содержание 751A
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