Mechanical Interlock; Information About Mechanical Interlock - Siemens SINOVA Manual

3.9.5

Mechanical interlock

3.9.5.1

Information about mechanical interlock

Note
To ensure that the interlock works properly, the following minimum requirements must be
fulfilled by the switchgear:
1. Bowden wires must be laid so that they are as straight as possible.
2. The bending radii of the Bowden wire must be > 50 mm.
3. The total bending angle across the length of the Bowden wire must not exceed 360°.
4. If the Circuit Breakers to be interlocked are arranged vertically, the interlock mechanisms
must be aligned.
5. Circuit Breakers to be interlocked must be arranged in such a way that 2 m or 4.5 m Bowden
wires can be properly laid in accordance with the conditions specified in points 1. - 4.
6. The Bowden wires must be secured before the interlock is adjusted (e.g. cable ties).
7. When choosing the switchgear compartment, make sure that it provides sufficient room for
adjusting the interlock.
8. Openings and cutout sections in system elements must be designed in such a way that the
direction of the Bowden wires is not changed and that the wires are not obstructed when
they are routed.
Mechanical interlock module
The mechanical interlock module can be used for two or three Circuit Breakers. The following
designations apply in the configuration instructions below:
• O
• I
• S
3WJ Air Circuit breakers
Operating Instructions, 12/2022, L1V30828903001-01
: Output information
1/2
: Input information
1/2 1/2
: Circuit Breaker
1/2/3 1/2/3
3.9 Accessories for locking and interlocking
1/2
Accessories
123