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3VT1 Molded Case Circuit Breakers up to 160 A
Accessories and Components
Motorized operating mechanisms
2/33
Siemens LV 36 · 2008
2
Recommended control pulses for switching the circuit breaker with motorized operating mechanism
after its switching off by overcurrent release or INSPECTION pushbutton
Automatic operation no. 1
Automatic operation no.2
Automatic operation no. 3
* Reswitching is only possible after deactivation of the shunt trip or under-
voltage release.
Graph description
15 1070
0
1
0
1
0
1
0
1
0
1
t
[ms]
NSO0_00074
HK
SP
SV
NS
70
60 … 500
> 200
1)
> 200
1)
> 1500
IMP ON
15
70
0
1
0
1
0
1
0
1
0
1
t
[ms]
NSO0_00075
HK
SP
SV
NS
70
60 …
∞
60 …
∞
> 200
1)
> 200
1)
> 20
> 500
IMP ON
IMP OFF
15
0
1
0
1
0
1
0
1
0
1
NSO0_00076
t
[ms]
HK
SP
SV
NS
70
60 … 500
> 200
1)
140
> 200
1)
> 500
IMP ON
Symbol
Description
HK
Main contacts
NS
Signal switch
SV
Pulse for shunt trip
SP
Pulse for undervoltage release
IMP ON
Make pulse for motorized operating mechanism
IMP OFF
Break pulse for motorized operating mechanism
Switched on
Switched off by releases, TEST or REVISION pushbutton
Switched off maually or by electrically by motorized oper-
ating mechanism (wound up state)