39 / 267
3VT1 Molded Case Circuit Breakers up to 160 A
Accessories and Components
Motorized operating mechanisms
2/29
Siemens LV 36 · 2008
2
3VT1 circuit breakers with motorized operating mechanism
Electrical switching off of the circuit breaker by motorized oper-
ating mechanism (OFF pushbutton)
Automatic operation no. 1, 2, 3
Electrical switching on of the circuit breaker by motorized oper-
ating mechanism (ON pushbutton).
Automatic operation no. 1, 2, 3
Recommended control pulses for electrically switching on and off the circuit breaker using the ON and OFF pushbuttons
Automatic operation no. 1
Automatic operation no. 2
Automatic operation no. 3
Graph description
0
1
0
1
0
1
t
[ms]
55
NSO0_00062
50
50
Auxiliary switch - NC contact
Auxiliary switch - NO contact
Main contacts
0
1
0
1
0
1
t
[ms]
65
70
70
NSO0_00063
Auxiliary switch - NC contact
Auxiliary switch - NO contact
Main contacts
NSO0_00064
t
[ms]
1
0
1
0
1
0
HK
NS
60 … 500
50
60 … 500
>20
> 520
> 520
> 20
< 70
IMP OFF
IMP ON
NSO0_00065
t
[ms]
1
0
1
0
1
0
HK
NS
60 …
∞
50
60 …
∞
>20
> 520
> 520
> 20
< 70
IMP OFF
IMP ON
NSO0_00066
t
[ms]
1
0
1
0
1
0
HK
NS
60 … 500
50
60 … 500
> 20
> 520
> 520
> 20
< 70
IMP ON
IMP OFF
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 maually or electrically by motorized operat-
ing mechanism (wound up state)