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3VT2 Molded Case Circuit Breakers up to 250 A
Accessories and Components
Manual operating mechanisms
3/29
Siemens LV 36 · 2008
3
■
Function
3VT9 300-8LA00 Mechanical interlocking
Provides mechanical interlocking of two circuit breakers/switch
disconnectors so that they cannot both be tripped simulta-
neously, but only one of them at the same time. Both circuit
breakers may be turned off simultaneously. Interlocking can be
used between two 3VT2 circuit breakers or between one 3VT2
and one 3VT3 circuit breaker. Both circuit breakers must be fur-
nished with a rotary operating mechanism (at least one with a ro-
tary operating mechanism and knob).
In order to use the interlocking, it is absolutely necessary to
comply with the dimensions shown in the figure and table.
3VT9 300-8LB00 Mechanical parallel switching
Provides for simultaneous switching of two circuit breakers/
switch disconnectors. Parallel switching can be used between
two 3VT2 circuit breakers or between 3VT2 and 3VT3 circuit
breakers. Each circuit breaker must be equipped with a rotary
operating mechanism and at least one with a knob.
In order to use parallel switching, it is absolutely necessary to
comply with the dimensions shown in the figure and table.
1)
Switching unit 3VT3 4P (4-pole version) can only be on the right side.
Left
switching
unit
Right switching unit
3VT2
3-pole
3VT2
4-pole
3VT3
3-pole
3VT3
4-pole
X
L
X
L
X
L
X L
mm mm mm mm mm mm mm mm
3VT2 3P 105 112 140 145.5 122.5 128.5 181 185.5
3VT2 4P 105 112 140 145.5 122.5 128.5 181 185.5
3VT3 3P 122.5 128.5 157.5 145.5 140 145.5 185 189
3VT3 4P 122.5 128.5 157.5 145.5 140 145.5 185 189
X
L
5
3
1
TEST
NSO0_00233
Left
switching
unit
Right switching unit
3VT2
3-pole
3VT2
4-pole
3VT3
3-pole
3VT3
4-pole
1)
X
L
X
L
X
L
X L
mm mm mm mm mm mm mm mm
3VT2 3P 105
+7
112
+7
140
+7
145.5
+7
122.5
+7
128.5
+7
x x
3VT2 4P 105
+7
112
+7
140
+7
145.5
+7
122.5
+7
128.5
+7
x x
3VT3 3P 122.5
+7
128.5
+7
157.5
+7
145.5
+7
140
+7
145.5
+7
x x
3VT3 4P 122.5
+7
128.5
+7
157.5
+7
145.5
+7
140
+7
145.5
+7
x x
TEST
NSO0_00234
RP-BD-CK10
PS
PS
PS
X
TEST
RP-BD-CK10
PS
PS
PS
SP
SV
TEST
RP-BD-CK10
PS
PS
PS
SP
SV
NSO0_00235