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3VT3 Molded Case Circuit Breakers up to 630 A
Accessories and Components
Motorized operating mechanisms
4/35
Siemens LV 36 · 2008
4
Circuit breaker switched off by overcurrent or auxiliary releases
and switched on by the motorized operating mechanism -
S-switch permanently closed (automatic storage)
Circuit breaker switched off by overcurrent or auxiliary
releases and switched on by motorized operating mechanism -
S-switch closed only for storing up
Description of charts
Circuit breaker states and toggle positions of the circuit breakers
NSO0_00246
t
[ms]
1
0
1
0
1
0
HK
RS
R
520
20 … 700
> 1400
50
> 880
OFF
IMP ON
NSO0_00246
t
[ms]
1
0
1
0
1
0
HK
RS
R
520
20 … 700
> 1400
50
> 880
OFF
IMP ON
NSO0_00247
t
[ms]
1
0
1
0
1
0
HK
RS
R
X + 520
20 … 700
> 1400
X
50
400 …
∞
> 880
> 100
OFF
IMP ON
IMP S
Symbol
Description
HK
main contacts
PS
auxiliary switch
RS
relative switch
R OFF
circuit breaker closing instant by release
IMP S
pulse to store up motorized operating mechanism
energy (generated by S switch)
IMP ON
make pulse for motorized operating mechanism
IMP OFF
break pulse for motorized operating mechanism
X
random segment of time
Circuit breaker state
lever positions of circuit breakers
Switched on
Switched off by releases, or by TEST
button or by the trip push button on the
motorized operating mechanism
Switched off manually or electrically by
the operating mechanism