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4.3.6 Shunt trip control unit
-S2
3
-HS11
4
36/ _ _ _ X _ _ _
•
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
S47183-e 01/2008
Emergency STOP
signal
-X14
5
-K1
:6
4
A1
3
:7
-K1
2
1
Key position - 5
Key number – 00: Without shunt trip or zero voltage release.
Key number – 10: With shunt trip.
Design and specifications are subject to change without notice
6
7
A2
10
-
:7
-X10, 11
24 V
-X10, 11
+
8
:9
9
C1
C2
21
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