Search

Search

Locking

Padlock devices can be used to lock 3VA molded case circuit breakers in the OFF (O) or ON (I) position. A molded case circuit breaker cannot be operated when it is locked.

Locking a molded case circuit breaker in the OFF (O) position

58213328907.png

In order to prevent closure of a 3VA molded case circuit breaker, it can be locked in the OFF (O) position by a padlock. Once it is locked, the 3VA molded case circuit breaker is safely locked in the OFF (O) position. It can be unlocked again only by an authorized person.

The padlock devices for locking the 3VA molded case circuit breaker in the OFF (O) position ensure safe separation of the main contacts as defined by IEC 60947-2.

Locking a molded case circuit breaker in the ON (I) position

58213435787.png

It is also possible to safely lock a 3VA molded case circuit breaker in the ON (I) position using a padlock device. The breaker contacts cannot be opened when it is locked in this position. A 3VA molded case circuit breaker can be released from its ON position again only by an authorized person.

The TRIP function, i.e. the protective functionality of the 3VA molded case circuit breaker, is not affected by locking the breaker in the ON (I) position. In the event of a fault, the 3VA molded case circuit breaker trips in the normal way.