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3VT3 Molded Case Circuit Breakers up to 630 A
Accessories and Components
Motorized operating mechanisms
4/36
Siemens LV 36 · 2008
4
Use of 3VT9 200-3M..0 motorized operating mechanism in the
automatic standby system
Wiring diagram of the motorized operating mechanism of the
circuit breaker
In use of circuit breakers 3VT2 or 3VT3 with mechanical inter-
locking by Bowden cable in the automatic standby system, it is
recommended to switch the circuit breaker off only by an auxil-
iary release. Otherwise, the first attempt of switching a standby
circuit breaker may fail.
Recommended control pulses for switching of the 3VT3 circuit
breakers by the motorized operating mechanism after their
switching off by a shunt trip or undervoltage release in the
automatic standby system
M
motor
P
storage device
X3
connector for connection of control circuits
X4
connector for external cycle counter
S5
switch indicating AUTO (NO-C)/MANUAL
(NC-C) mode
YC
external 3VT9 300-3MF10 cycle counter
B
recommended connection of control circuits
(is not included in the motor drive supply)
ON
pushbutton
OFF
pushbutton
S
switch for storage (closed = automatic storage;
it can be closed permanently)
Q3
motorized operating mechanism of circuit
breaker, see page E69
J
X4
A2
B2
A1
B1
YC
3
6
4
2
1
2
5
1
X3
MP
NC NO
S6
C
X3
12 10
11
M P
U
<
U
NSO0_00079
3VT9 300-1U.00
3VT9 300-1S.00
B
PE
NC NO
S5
C
9 7
8
L+
Q3
S
N-
N-
Cycle
counter
acc.c. 10
Control circuit
Motor drive
ON
OFF
or
Symbol
Description
HK
Main contacts
RS
Relative switch
SV
Pulse for shunt release
SP
Pulse for undervoltage release
IMP ON
Motorized operating mechanism make pulse
IMP OFF
Motorized operating mechanism storage pulse
(generated by S switch)
Switched on
Switched off by releases, TEST or REVISION push
button
Switched off maually or by motorized operating
mechanism electrically (wound up state)
20
0
1
0
1
0
1
0
1
0
1
NSO0_00080
t
[ms]
HK
SP
SV
RS
200
200 … 700
> 880
520
50
> 1400
IMP ON
20
0
1
0
1
0
1
0
1
0
1
NSO0_00081
t
[ms]
HK
SP
SV
RS
>200
> 100
200 … 700
400 …
∞
> 880
X + 520
50
X
> 1400
IMP ON
IMP S