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3VT2 Molded Case Circuit Breakers up to 250 A
Accessories and Components
Mounting accessories
Plug-in design
3/38
Siemens LV 36 · 2008
3
With motorized operating mechanism
Recommended wiring
Description
Unplugging the circuit breaker
with motorized operating mechanism
• Each time before removing the circuit breaker, we recommend
first to turn the AUTO/MANUAL switch on the motorized oper-
ating 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.
Switches in the accessory compartments of the switching unit
Changes in states of switches when inserting and withdrawing the circuit breaker
0 = contact open, 1 = contact closed
1)
Accessory compartments 4, 5, 6 are for 4-pole version only.
L+
Q3
X3
MP
NC NO
S5
C
X3
X4
PE
YC
N–
9 7
8
3
6
4
2
1
2
5
1
M P
NSO0_00208
S
B
Operating
counter
Motor drive
Motor drive control circuits
ON
OFF
Symbol
Description
M P
3VT9 300-3M.00 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
YC
3VT9 300-3MF10 external operations counter
B
recommended wiring of the control circuits (control circuits
not included in motorized operating mechanism 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 230 V LSN-DC 2C/1
State of switches before removing
- connected position
State of switches after removing
- withdrawn
Accessory compartment
Accessory compartment
1
2
3 (4,5,6)
1)
1
2
3 (4,5,6)
1)
Knob position of
circuit breaker
State of the
main contacts
3VT9 300-2AC10
3VT9 300-2AD10
3VT9 300-2AC10
3VT9 300-2AD10
3VT9 300-2AC10
3VT9 300-2AD10
3VT9 300-2AC10
3VT9 300-2AD10
3VT9 300-2AC10
3VT9 300-2AD10
3VT 9300-2AC10
3VT9 300-2AD10
Switched on
1 1 0 0 1 1 0 0 1 0 0 0 1
Manually switched off or
by motorized operating mechanism
0 1 0 0 1 0 1 1 1 0 0 0 1
Switched off by releases
0 0 1 1 0 0 1 1 0 1 0 0 1
Switched off from switched-on state:
by means of auxiliary release,
TEST pushbutton or by OFF push-
button on the motorized operating
mechanism
0 1 0 1 0 0 1 1 1 0 0 0 1
4
3
2
1
4
3
2
1
4
3
2
1
4
3
2
1
4
3
4
3
4
3
2
1