Siemens SENTRON 3VL160X System Manual page 79

Withdrawable version
The 3VL molded case circuit breakers can be used as withdrawable devices. They can be
connected on either the front or the back. Terminal covers are provided and are required for
final installation.
In the connected position, the molded case circuit breaker is completely engaged, and all
contacts - supply, outgoing and auxiliary contacts - are connected to the guide frame. The
molded case circuit breaker is ready for operation.
Note
Safety interlock
A safety interlock prevents the molded case circuit breaker from being removed when it is
switched on. The safety interlock causes the molded case circuit breaker to switch off so that
the arc which occurs inside the circuit breaker when current flows can be extinguished.
The molded case circuit breaker can be installed in and removed from the guide frame when
it is in the removable position.
Connected position
3VL IEC molded case circuit breakers
System Manual, 11/2013, 110 0110 - 02 DS 03
Disconnected position
Installing/mounting
6.1 Installation methods
Removable position
79