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3VT2 Molded Case Circuit Breakers up to 250 A
Accessories and Components
Manual operating mechanisms
3/30
Siemens LV 36 · 2008
3
3VT9 300-8LC.0 Mechanical interlocking
• Provides mechanical interlocking of two circuit breakers/
switch disconnectors so that they cannot both be tripped si-
multaneously, but only one of them at a time. Both circuit
breakers may be turned off simultaneously.
• The 3VT9 200-8LC10 mechanical interlocking is intended for
two 3VT2 circuit breakers. 3VT9 300-8LC20 Interlocking is in-
tended for one 3VT2 circuit breaker and one 3VT3.
• Circuit breakers can be delivered in fixed-mounted, plug-in
and withdrawable designs.
Circuit breaker installation in switchgear and controlgear
assemblies
Detailed information can be found in the instructions for use,
which you may download from our website
www.siemens.com/technical assistance
Order No. of mechanical
interlocking
3VT9 200-8LC10 3VT9 300-8LC20
Circuit breaker types
3VT2
3VT3
30
45
109
NSO0_00236
0 ... 700
ON
OFF
TEST
ON
OFF
TEST
min. 80
R = 40
min