Siemens SENTRON 3WL10 Series Manual page 99

Mechanical interlocks of the control cabinet door and with further 3WL / 3VA circuit breakers
Mechanical interlocks prevent more than one of a number of mutually interlocked circuit
breakers from being in the CLOSED position at the same time. However, all circuit breakers
can be in the OPEN breaker position at the same time.
The following interlock combinations are possible:
● Fixed breaker - fixed breaker
● Fixed breaker - withdrawable breaker
● Withdrawable breaker - withdrawable breaker
The circuit breakers can also be interlocked with other sizes of 3WL-series breakers.
Interlocking is possible in both directions, i.e. it can be set up from the 3WL10 or from the
larger-size circuit breaker.
Interlocking with molded case circuit breakers of the 3VA series size 1250 A (market launch
in 2018) is also possible. However, in this case interlocking is only possible in one direction:
It must always be initiated from the 3VA circuit breaker.
①
Mutual mechanical interlocking
②
Locking mechanism to prevent opening of the control cabinet door, direct
③
Locking mechanism to prevent opening, Bowden cable
Mounting of external auxiliary switches AUX 15CO (not shown)
Air circuit breaker 3WL10
Manual, 11/2017, L1V30499596002-01
Accessories
3.4 External accessories
97