Siemens UL 1066, Operating Instructions Manual

Page: 262 / 334

19 – 1
19 Mechanical circuit breaker interlocking
Mechanical interlocking module
(1) Cradle
(2) Fixed-mounted breaker
19.1 Configurations
A maximum of three circuit breakers may be interlocked.
NOTE
For proper function of the interlocking device, the following minimum prerequisites have to be met:
1 Bowden cables are to be laid out as straight and as unbowed as possible.
2 Bending radii of the Bowden cables must exceed > 20" (500 mm).
3 The total curvature of the Bowden cable must not exceed 540 degrees.
4 When stacking interlocked circuit breakers vertically, the interlocking devices shall be vertically aligned with each other.
5 Circuit breakers intended to be interlocked must be positioned so that Bowden cables of 6 ft or 15 ft (2 m or 4.5 m) length can

be laid out per the above requirements 1-4.
6 Before adjusting the interlocking device, the Bowden cables must be secured, e.g. using cable ties.
7 Adequate spacing is required to provide enough room for adjustment of the interlocking device.
(2)
(1)