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3VT3 Molded Case Circuit Breakers up to 630 A
Accessories and Components
Mounting accessories
Plug-in design
4/39
Siemens LV 36 · 2008
4
Recommended wiring of the circuit breaker in plug-in design
with motorized operating mechanism
Unplugging the circuit breaker
with motorized operating mechanism
• Each time before removing the circuit breaker, we recommend
turning first of all the AUTO/MANUAL switch on the motorized
operating mechanism to the MANUAL position
• More operating information can be found in the operating
instructions
• Not adhering to this procedure or failing to follow the recom-
mended wiring, could mean that the circuit breaker will not
successfully turn on at the first attempt.
Changes in states of switches when inserting and withdrawing the circuit breaker
0 = contact open, 1 = contact closed
1)
Accessory compartment 4, 5, 6 are for 4-pole version only.
L+
Q3
X4
YC
3
6
4
2
1
2
5
1
X3
MP
NC NO
S6
C
X3
12 10
11
M P
S
B
PE N-
NC
NO
S5
C
9 7
8
ON
OFF
NSO0_00350
Motor drive control circuits
Operating
counter
Motor drive
Symbol
Description
MP
3VT9 300-3M..0 motorized operating mechanism
M motor
P
storage device
X3
terminal strip to connect control circuits
X4
terminal strip for external operations counter
S5
switch indicating AUTO (NO-C)/MANUAL (NC-C) modes
S6
Switch to indicate full storage (ready to switch on: NO-C)
YC external operations counter 3VT9 300-3MF10
B
recommended wiring of the control circuits (control circuits not
included in motorized operating mechanism delivery)
ON make push button
OFF
break push button
S
switch to store up energy
Q3
motorized operating mechanism circuit breaker for
AC 24V LSN 4C/1
AC 48V LSN 4C/1
AC 110V LSN 4C/1
AC 230V LSN 2C/1
DC 24V LSN-DC 4C/1
DC 48V LSN-DC 4C/1
DC 110V LSN-DC 4C/1
DC 220V LSN-DC 2C/1
State of circuit breaker before removing
State of switches before removing
- inserted position
→
State of switches after removing -
withdrawn
Accessory compartment
1
2
3, 4, 5
(6 ... 9)
1)
1
2
3, 4, 5
(6 ... 9)
1)
Lever position of
the circuit breaker
State of the
main contacts
3VT9 300-2AC10
3VT9 300-2AH10
3VT9 300-2AC10
3VT9 300-2AH10
3VT9 300-2AC10
3VT9 300-2AH10
3VT9 300-2AC10
3VT9 300-2AH10
3VT9 300-2AC10
3VT9 300-2AH10
3VT9 300-2AC10
3VT9 300-2AH10
Switched on
1 1
0
0
1
1
0
1
0
1
0
0
1
Manually switched off or by motorized operating
mechanism
0 1
0
0
1
0
1
1
0
1
0
0
1
Switched off by releases
0 0
1
1
0
0
1
0
1
1
0
0
1
Switched off from switched-on state:
by means of auxiliary release, TEST push button
or by OFF push button on the motorized operat-
ing mechanism
0 1
0
1
0
0
1
1
0
1
0
0
1
4
3
3
-
2
1
4
3
3
-
2
1
4
3
3
-
2
1
4
3
2
1
4
3
3
-
2
1
4
3
2
1