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3VT2 Molded Case Circuit Breakers up to 250 A
Accessories and Components
Motorized operating mechanism
3/33
Siemens LV 36 · 2008
3
Tripping of the circuit breaker with motorized operating mecha-
nism by the overcurrent release (switch S in switched-on state –
automatic storage)
Tripping of the circuit breaker with motorized operating mecha-
nism by a shunt release or undercurrent release (switch S in
switched-on state – automatic storage)
Circuit breaker switched on by the motorized operating mecha-
nism (electrical pushbutton ON) and switched off by the shunt
release
Circuit breaker switched on by the motorized operating mecha-
nism (electrical pushbutton ON) and switched off by the under-
voltage release
20
20
20
20
30
30
30
520
520
30
0
1
0
1
0
1
0
1
0
1
0
1
0
1
t
[ms]
520
520
NSO0_00241
2
4
6
1
3
5
3.4 3.3
3.2 3.1
2.4 2.3
2.2 2.1
1.4 1.3
1.2 1.1
Main contacts
Auxiliary switch
Auxiliary switch
Relative switch
Relative switch
Early switch
Early switch
accessory
compartment
2
accessory
compartment
3
accessory
compartment
1
20
20
20
20
30
520
30
520
0
1
0
1
0
1
0
1
0
1
NSO0_00242
t
[ms]
2
4
6
1
3
5
3.4 3.3
3.2 3.1
2.4 2.3
2.2 2.1
accessory
compartment
3
accessory
compartment
2
Main contacts
Auxiliary switch
Auxiliary switch
Relative switch
Relative switch
L+
Q3
X3
MP
NC NO
S5
C
X3
J
X4
A2
B2
A1
B1
PE
YC
N-
9 7
8
3
6
4
2
1
2
5
1
N-
M P
U
<
U
NSO0_00243
3VT9 300-1O.00
3VT9 300-1S.00
S
B
Motor drive
ON
OFF
acc. c. no.10
or
Ext. oper.
counter
Recommended wiring of the
control circuits
L+
Q3
X3
MP
NC NO
S5
C
X3
J
X4
A2
B2
A1
B1
PE
YC
N-
9 7
8
3
6
4
2
1
2
5
1
N-
M P
U
<
U
NSO0_00244
3VT9 300-1U.00
3VT9 300-1S.00
S
B
Motor drive
ON
OFF
acc. c. no.10
or
Ext.oper.
counter
Recommended wiring of the
control circuits