GE Gerapid 2607 - Shunt Trip Control Unit

S47183-e 01/2008 Design and specifications are subject to change without notice 21
4.3.6 Shunt trip control unit
• The EM-STOP signal is provided for resetting K2 on the SU-control circuit. It effects with priority in switching OFF (by ST or
UVR) before switching ON. Once switching ON and OFF signals are simultaneous, switching OFF command will stay
longer than switching ON. It means, that OFF command is master command.
• The shunt trip operates for short time period only. After contacts opening, switch HS 11 cuts ST’s supply circuit.
Fig. 27 ST control circuit
3
4
5
6
:7
:6
2
1
7
8
9
10
-X10, 11
-X10, 11
-X14
-K1
-K1
-
HS11
-S2
24 V
-
+
A1
A2
Emergency STOP
signal
C1
C2
3
4
:7
:9
Key position - 5
Key number – 00: Without shunt trip or zero voltage release.
Key number
–
10: With shunt trip.
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