161 / 267
3VT3 Molded Case Circuit Breakers up to 630 A
Accessories and Components
Mounting accessories
Withdrawable design
4/41
Siemens LV 36 · 2008
4
Locking
Locking the circuit breaker Locking the withdrawable device
in withdrawable device against inserting the circuit breaker
against tampering
Withdrawable design with motorized operating mechanism
Recommended wiring of the circuit breaker in withdrawable
design with motorized operating mechanism
Wiring diagram description
Inserting and withdrawing the circuit breaker
with motorized operating mechanism
• Each time before inserting or withdrawing the circuit breaker,
we recommend first to turn 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.
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 cir-
cuits not included in motorized operating mechansism-
delivery)
ON
make pushbutton
OFF
break pushbutton
S
switch to store up energy
Q3
motorized operating mechanism circuit breaker for
AC 24 V LSN 4C/1
AC 48 V LSN 4C/1
AC 110 V LSN 4C/1
AC 230 V LSN 2C/1
DC 24 V LSN-DC 4C/1
DC 48 V LSN-DC 4C/1
DC 110 V LSN-DC 4C/1
DC 220 V LSN-DC 2C/1