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3VT2 Molded Case Circuit Breakers up to 250 A
Accessories and Components
Motorized operating mechanism
3/32
Siemens LV 36 · 2008
3
■
Function
Circuit breaker switched on/off by the motorized operating mechanism
Circuit breaker switched on by the motorized operating mecha-
nism – electrically by pushbutton ON
Circuit breaker switched off by the motorized operating mecha-
nism – electrically by pushbutton OFF
Wiring diagram
Circuit breaker switch on and switched off by motorized operat-
ing mechanism, electrically by ON pushbutton and OFF push-
button
Circuit breaker states and toggle positions of the circuit breaker
Wiring diagram description
50
50
40
0
1
0
1
0
1
0
1
0
1
0
1
0
1
t
[ms]
20
20
NSO0_00238
2
4
6
1
3
5
3.4 3.3
3.2 3.1
2.4 2.3
2.2 2.1
10.Y2
10.Y4
10.Y1
10.Y3
10.Y2
10.Y4
10.Y1
10.Y3
Main contacts
Auxiliary switch
Auxiliary switch
Relative switch
Relative switch
Early switch
Early switch
accessory
compartment
2
accessory
compartment
3
accessory
compartment
10
20
800
800
800
0
1
0
1
0
1
0
1
0
1
0
1
0
1
t
[ms]
900
900
NSO0_00239
2
4
6
1
3
5
3.4 3.3
3.2 3.1
2.4 2.3
2.2 2.1
10.Y2
10.Y4
10.Y1
10.Y3
10.Y2
10.Y4
10.Y1
10.Y3
Main contacts
Auxiliary switch
Auxiliary switch
Relative switch
Relative switch
Early switch
Early switch
accessory
compartment
2
accessory
compartment
3
accessory
compartment
10
M P
NC
L +
MP
PE
N -
6
X3
8
2
X4
2
1
C
S5
NO
X3
5
1
4
3
9
7
OF F
B
Q3
ON
S
Motor drive
Recommended wiring of the control circuits
Ext. oper.
counter
Circuit breaker state
Toggle positions of circuit breaker
Switched on
Switched off by releases, or by TEST
button or by the trip pushbutton on the
motorized operating mechanism
Switched off manually or electrically by
the operating mechanism
Symbol
Description
MP
3VT9 200-3M..0 motorized operating mechanism
M
motor
P
storage mechanism
X3
connector to connect control circuits
X4
connector for external operations counter
S5
switch indicating AUTO/MANUAL modes
YC
external 3VT9300-3MF10 operations counter
B
recommended wiring of the control circuits (not included
in operating mechanism order)
ON
make pushbutton
OFF
break pushbutton
S
switch for energy storage
(switched on = automatic storage, may be
continuously switched on)
Q3
motorized operating mechanism circuit breaker