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3VT1 Molded Case Circuit Breakers up to 160 A
Accessories and Components
Motorized operating mechanisms
2/31
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
* If the circuit breaker was switched off by an overcurrent release, it is nec-
essary to remove the error before its switching on.
Graph description
Symbol
Description
HK
Main contacts
NS
Signal switch
IMP ON
Make pulse for motorized operating mechanism
IMP OFF
Break pulse for motorized operating mechanism
Switched on
Switched off by releases, TEST or INSPECTION pushbut-
ton
Switched off maually or electrically by motorized operat-
ing mechanism (wound up state)
1
0
1
0
1
0
1070
70
NSO0_00069
t
[ms]
HK
NS
60 … 500
> 1500
1)
IMP ON
60 …
∞
1
0
1
0
1
0
70
70
NSO0_00070
t
[ms]
HK
NS
60 …
∞
1)
> 500
> 20
IMP OFF
IMP ON
1
0
1
0
1
0
70
140
60 … 500
NSO0_00071
t
[ms]
HK
NS
1)
IMP ON