Siemens SENTRON 3VL System Manual page 96

Installing/mounting
7.3 Locking devices
Mutual interlocking (rear interlocking module) of two circuit breakers in the fixed-mounted, plug-in and
withdrawable versions
Fixed-mounted version (lock at rear)
Fixed-mounted version (lock at front)
The rear interlocking module enables mutual mechanical interlocking of two SENTRON VL
circuit breakers of the same frame size. The rear interlocking module is attached behind the
circuit breakers to the mounting plate supplied by the customer.
A tappet on each end of the rocker automatically accesses the either of the breakers through
an opening in the mounting plate and the base of the circuit breakers. The rear interlocking
module prevents both circuit breakers from being in the "ON" position at the same time.
The rear interlocking module can be used with fixed-mounted, plug-in and withdrawable
circuit breakers.
Cross wiring of internal accessories via the rear of the circuit breaker is not prevented.
This locking version is possible with all operating mechanism types (toggle handle, rotary
operating mechansim, and motorized operating mechanism).
96
Plug-in version (lock at rear)
Plug-in version (lock at front)
3VL molded-case circuit breakers
System Manual, 03/2009, 110 0110 - 02 DS 01