1.15
Date Code 20100129
Instruction Manual
SEL-751A Relay
Introduction and Specifications
Applications
➤
Rack-Mounting Kits
➢
For one relay
➢
For two relays
➢
For one relay and a test switch
➤
Wall-Mounting Kits
➤
Bezels for Retrofit
➤
Replacement Rear Connector Kit
For all SEL-751A mounting accessories for competitor products, including
adapter plates, visit
http://www2.selinc.com/mounting_selector/
.
Applications
includes ac and dc connection diagrams for various
applications. The following is a list of possible application scenarios:
➤
Distribution feeder protection (feeder protection with core-
balance CT)
➤
Delta-wye transformer overcurrent protection
➤
Wye-delta-wye transformer overcurrent protection
➤
With or without external RTD module
➤
With Arc-Flash Protection
shows typical current connections. Refer to
for additional applications and the related connection diagrams.
Figure 1.1
Typical Current Connections
SEL-751A
The current transformers and the SEL-751A
chassis must be grounded in the relay cabinet.
A
B
C
IN
IC
IB
IA
Z08
Z07
Z06
Z05
Z04
Z03
Z02
Z01
52
FEEDER
BUS
Содержание 751A
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