GE Industrial Solutions GERAPID 2508, 4008, 5008, 6008 WITH ARC CHUTE 1X2 - Manual (Page 20)

20 Design and specifications are subject to change without notice S47183De rev.02 2011-03-14
4.3.5 Shunt trip control circuit
 The closing 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 main contacts open, switch HS 11 cuts off shunt trip coil.
 Manual closing of the breaker, while –S2 contact is closed, leads to overheating of ST coil and will damage coil.
Fig. 27 ST control circuit
Key position - 5
Key number - 00: Without shunt trip or zero voltage release.
Key number - 10: With shunt trip.
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