Siemens SENTRON 3VL System Manual page 95

Two SENTRON VL circuit breakers can be mutually mechanically interlocked using a
bowden cable and the locking modules.
Modules with the same dimensions or with the dimensions specified above (e.g. VL250 and
VL400) can be locked together.
Use of this accessory kit means only one of the circuit breakers is in the "ON" position at any
time.
Fixed-mounted and plug-in circuit breakers use different interlocking modules. However,
these are compatible with each other. This enables both to be used in locking circuits.
Two circuit breakers can be mounted side by side or one above the other. The distance
between the two circuit breakers depends on the length of the bowden cable and its
minimum bending radius. The cable comes in lengths of 0.5, 1.0 and 1.5 m. The minimum
bending radius for each cable is 60 mm. The length of the bowden cable must not be altered
by the customer. The bowden cable has a mechanical endurance of 10,000 operations.
Each bowden cable must be ordered separately.
Note
Not possible in combination with the motorized operating mechanism.
3VL molded-case circuit breakers
System Manual, 03/2009, 110 0110 - 02 DS 01
Installing/mounting
7.3 Locking devices
95