Sel 551 - Figure 2.11 SEL-551 Provides Overcurrent Protection for a Delta-Wye Transformer Bank

2.11
Date Code 20110408 Instruction Manual SEL-551 Relay
Installation
SEL-551 AC/DC Connection Diagrams for Example Applications
Figure 2.11 SEL-551 Provides Overcurrent Protection for a Delta-Wye Transformer Bank
52A
C
B
A
TC
52
(high-side)
ba
c
(low-side)
n
(-) Trip
Circuit
Breaker
Failure
Trip
Circuit
to Annunciator or RTU
Trip
Coil
(+)
(+)
(+)
86B
Out
Lock
86
(-)
SEL-551 Relay
IN
IC
IB
IA
IN2
IN1
ALARM
OUT4
OUT3
OUT2
OUT1