Mechanical Interlocks - Siemens UL 1066 Operating Instructions Manual

17

Mechanical interlocks

Mechanical interlock
Access block via CLOSE/OPEN button 
1
(locking set)
Cubicle door locking mechanism
2
Interlock against racking when
3
cubicle door is open
17 – 1
(1)
(2)
(3)
Application
The CLOSE/OPEN buttons are each covered in such a way that operation is only possible

with a tool. (page 17-2)
The cubicle door cannot be opened
- if the circuit breaker is in the CONNECTED position.
The racking handle cannot be withdrawn if the cubicle door is open.
 (page 17-3)