Accessories
4.7 Locking and interlocking
3VA molded case circuit breakers with IEC certificate
Manual, 03/2019, A5E03603177010-03
373
4.
Use the single key to turn the cylinder lock of the 3VA molded case circuit breaker to be
released to the "unlocked" position.
Once the key is in the "unlocked" position, it must not be removed.
5.
Move the handle of the released 3VA molded case circuit breaker to the ON (I) position.
Releasing a different molded case circuit breaker
1.
Move the handle of the currently released molded case circuit breaker to the OFF (O)
position.
2.
Turn the cylinder lock to the vertical "locked" position and remove the key.
This 3VA molded case circuit breaker is now safely locked in the OFF (O) position and
cannot be operated.
3.
Use the same key to turn the cylinder lock of the 3VA molded case circuit breaker to be
released to the horizontal "unlocked" position.
4.
Move the handle of the released 3VA molded case circuit breaker to the ON (I) position.
Interlock combinations
The following interlock combinations can be implemented with cylinder locks:
●
All 3VA1 and 3VA2 molded case circuit breakers can be mutually interlocked.
●
Interlocks can be implemented between all sizes of breakers.
●
Mutual interlocks can be implemented between all 2-pole, 3-pole and 4-pole molded case
circuit breakers.
