Siemens SINOVA - Mechanical Interlock of Fixed-Mounted Circuit Breakers

Accessories
3.9 Accessories for locking and interlocking
3WJ Air Circuit breakers
Operating Instructions, 12/2022, L1V30828903001-01
129
3.9.5.2 Mechanical interlock of fixed-mounted Circuit Breakers
Article No.
Description
Article No.
Mutual mechanical interlock for fixed-mounted Circuit Breaker
3WJ9111-0BB21
Check the contents of the packaging
Preparatory work
1. Open the Circuit Breaker and discharge the stored-energy spring.
2. Remove the operator panel and the secondary disconnect terminals.
See chapter Preparatory and concluding installation steps for the installation of internal
accessories (Page 57).
The minimum distance (a) required between the Circuit Breaker and the cabinet is as follows:
• For frame size 1 : a = 150 mm
• For frame size 2 : a = 200 mm
If necessary, remove the Circuit Breaker from the cabinet.