Accessories
4.7 Locking and interlocking
3VA molded case circuit breakers with UL and IEC certification
Manual, 01/2019, L1V30435333-01
315
3.
Insert one single key in one circuit breaker included in the interlock; store or lock away
all other keys.
4.
Use the single key to turn the cylinder lock of the 3VA UL molded case circuit breaker to
be released to the "unlocked" position.
In "unlocked" position, the key can no longer be removed and must remain in the cylinder
lock.
5.
Move the handle of the released 3VA UL 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.
The 3VA UL molded case circuit breaker released up to then is now securely locked in
the OFF (O) position and cannot be actuated.
3.
Use the removed key to turn the cylinder lock of the 3VA UL molded case circuit breaker
to be newly released to the horizontal "unlocked" position.
4.
Move the handle of the released 3VA UL molded case circuit breaker to the ON (I)
position.
Interlock combinations
The following interlock combinations can be implemented with cylinder locks:
●
All 3VA5 and 3VA6 molded case circuit breakers can be 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.
