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Accessories
3.5 External accessories
Mutual mechanical interlocking
With the interlocking devices, two circuit breakers can be mutually interlocked. The
interlocking device only ever releases one circuit breaker at a time, thereby ensuring that
only the released circuit breaker can be operated. The other circuit breaker remains in the
safe OPEN position and is blocked by the interlocking mechanism.
Both horizontally and vertically oriented circuit breakers can be mutually mechanically
interlocked.
Maximum distances between circuit breakers:
• Horizontal: max. 2000 mm
• Vertical: max. 1000 mm
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-mounted breaker - fixed-mounted breaker
• Fixed-mounted breaker - withdrawable breaker
• Withdrawable breaker - withdrawable breaker
Fixed-mounted
To mount the modules on a fixed-mounted breaker, the side wall must be modified so that
the main contact position can be mechanically transmitted to the interlocking module. It
is important whether the circuit breaker is mounted on the wall or on the floor. In one
case (wall mounting), the modification must be made to the side part; in the other (floor
mounting), the base support must be modified. The necessary modification is made in the
factory before delivery for the configuration ordered by the customer. This requires the
correct article number.
Description
Mounting support
standard (circuit breaker
feet) for mounting the
circuit breaker on the
floor.
Mounting support ex‐
tended (circuit breaker
feet); kit incl. mechani‐
cal transmission of
switch position on cir‐
cuit breaker side wall
Side wall extension kit,
modification for me‐
chanical switch position
transmission on circuit
breaker side wall
120
①
Version
Fixed-mounted breaker
floor mounting
(without externally
mounted interlocking
module)
Fixed-mounted breaker
floor mounting
(with externally moun‐
ted interlocking mod‐
ule)
Fixed-mounted breaker
wall mounting
(with externally moun‐
ted interlocking mod‐
ule)
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
Article number
3VW9011-0BB51
3VW9011-0BB52
3VW9011-0BB53
Equipment Manual, 10/2023, L1V30499596002-03
Modification in the fac‐
tory with option
A06
S56
S57
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