Accessories
3.9 Accessories for locking and interlocking
3WJ Air Circuit breakers
124 Operating Instructions, 12/2022, L1V30828903001-01
If the output information 1 of Circuit Breaker 1 is interconnected with the input information 2
of Circuit Breaker 2, for example, the following abbreviations are used:
S
1 O1 - S2 I2
The statuses of the Circuit Breakers are indicated on the operator panel as fol-
lows:
Circuit Breaker CLOSED
Circuit Breaker OPEN and not ready to CLOSE (interlocked)
Circuit Breaker OPEN and ready to CLOSE (not interlocked)
Configuration: Two Circuit Breakers back to back
Description:
A Circuit Breaker can only be closed when the other is open.
Required equipment:
Each Circuit Breaker is equipped with an interlocking module and a Bowden wire.
Terminals for the Bowden wires:
1. Bowden wire: S
1 O1 - S2 I1
2. Bowden wire: S
1 I1 - S2 O1
-head screws with strain washers must be screwed into the index brackets at the
1
1
2
1
In certain configurations, additional Bowden wires are required.
Please see chapter Installing Bowden wire (Page 138)
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