Siemens UL 489 - 17 Mechanical Interlocks

17 – 1
17 Mechanical interlocks
Mechanical interlock Application
1
Access block via CLOSE/OPEN button 
(locking set)
The CLOSE/OPEN buttons are each covered in such a way that operation is only possible
with a tool.
 (page 17-2)
2
Cubicle door locking mechanism The cubicle door cannot be opened
- if the fixed-mounted circuit breaker is closed (signal transmission through
Bowden cable) or
- if the circuit breaker is in the CONNECTED position.  (page 17-3)
3
Interlock against racking when
cubicle door is openNot available for FS I
The racking handle cannot be withdrawn if the cubicle door is open.
0064-06-04_nu
(3)
(1)
(2)