Locking the Circuit Breaker in Open Position with Keylocks

@experts: Topic shared between DOCA0284 and DOCA0285, with profiling; indicate if comments do not apply to both guides

Optional keylocks can be used:

To lock one MasterPacT MTZ1 circuit breaker in the open position. When locked the circuit breaker cannot be closed, either locally with the closing pushbutton, or remotely.
To interlock several MasterPacT MTZ1 circuit breakers locked with the same key.

To use keylocks to lock the circuit breaker in the open position, an optional OFF-position locking accessory is necessary.

NOTE: This accessory is not compatible with the VCPO OFF-position padlocking accessory. The two accessories cannot be used at the same time.

The OFF-position locking accessory is an optional accessory that is mounted on the front of the circuit breaker.

The OFF-position keylocking accessory can be fitted with either:

The following types of keylocks can be fitted:

Ronis keylock

Profalux keylock

Castell keylock (keylock not provided)

Kirk keylock (keylock not provided)

For information on the accessory installation, consult the instruction sheet on the Schneider Electric website: NVE56770.

For circuit breakers equipped with two keylocks, locking with one key is sufficient to lock the circuit breaker in the open position.

Step	Action
1	Press and hold the opening pushbutton.
2	With the opening pushbutton pressed, turn the key clockwise to lock the circuit breaker.
3	Remove the key.
4	Release the opening pushbutton.
5	Check that the circuit breaker is locked in the open position and cannot be closed, either locally with the closing pushbutton, or remotely.

For circuit breakers equipped with two keylocks, both keys must be inserted in the keylocks to unlock the circuit breaker.

Step	Action
1	Put the key in the keylock.
2	Turn the key clockwise to unlock the circuit breaker.
3	Press the closing pushbutton to close the circuit breaker. NOTE: The key remains captive in the keylock.