Function Check - Siemens UL 489 Operating Instructions Manual

19.2.4 Function check

- Close the cubicle doors
- Charge closing spring of circuit breakers to be interlocked
- Test the various possibilities of the planned interlocking configuration one after the other
- Re-adjust Bowden cables if necessary
Then:
- Discharge the closing spring of the circuit breakers to be interlocked
Note
The following maintenance points must be followed:
The adjustment of the Bowden cables needs to be checked after the first 100 breaker operations and must be readjusted if 
1
necessary.
2 The adjustment of the interlocking device needs to be checked and, if necessary, readjusted every 1000 operations or at least
once every year.
During the inspection, the Bowden cables have to be checked against kinks and abrasions, split wires of the exposed 
3
steel cable, damage to the cable housing and the adjustment unit (tube setting with thread and nut) and have to be readjusted 
if necessary. In addition, the movability of movable parts of the interlocking device in their bearings needs to be examined.
4 In extreme environmental conditions (e.g. increased environmental temperature or exposure to chemicals) maintenance checks
needs to be performed more frequently.
5 When maintaining the circuit breaker, check the operation of the interlock device and replace as necessary. See table
Catalog Numbers
Mechanical Interlocking
Mechanical interlock assembly for drawout circuit breakers (FS I, II, and III)
Mechanical interlock assembly for fixed-mounted circuit breakers (FS I)
Mechanical interlock assembly for fixed-mounted circuit breakers (FS II and III)
Qty.(1) Bowden Cable - 2m
Qty.(1) Bowden Cable - 4.5m
19 – 14
 (page 6-4)
 (page 24-2)
Catlog number
WLNTLK
WLNTLKF1
WLNTLKF
WLNTLWIRE2
WLNTLWIRE4
(page -14).