Locking the Circuit Breaker

Locking Options with the Direct Rotary Handle

DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH When the circuit breaker handle is locked in the (O) OFF position, always use a properly rated voltage sensing device to confirm that power is off before working on equipment. Failure to follow these instructions will result in death or serious injury.

The direct rotary handle offers the following locking options:

Prevent the door from being opened if the door interlock was activated at installation time
Prevent the rotary handle from being operated

The handle can be locked in the O (OFF) or I (ON) position.

No setup is required to lock the handle in the O (OFF) position.

Before the handle can be locked in the I (ON) position, the rotary handle block must be dismounted and the physical setup of the handle must be changed. This is usually done at installation. For information about how to set up the handle to be locked in the I (ON) position, see the relevant instruction sheet.

NOTE: Locking the rotary handle in the I (ON) position does not disable the circuit breaker. If an electrical fault is detected, the circuit breaker still trips. When the rotary handle is unlocked, it moves to the Trip position.

Lock position	Lock type	Lock characteristics
O (OFF)	Standard padlocking	Up to 3 padlocks (not supplied) Diameter: 4–8 mm (3/16–5/16 in.)
I (ON) or O (OFF)	Padlocking after modification of the rotary handle during installation	Up to 3 padlocks (not supplied) Diameter: 4–8 mm (3/16–5/16 in.)
I (ON) or O (OFF)

Inserting Padlocks in the Handle

Step	Action	Comment
1	With the handle in the O (OFF) or I (ON) position, turn the knob as illustrated until the slot in the handle opens.
2	Insert the padlocks in the slot.

Overriding the Door Interlock

DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH Overriding the door interlock must only be done by qualified electrical personnel. Failure to follow these instructions will result in death or serious injury.

If it was activated at the time of installation, the interlock between the door and the circuit breaker allows you to open the door only when the circuit breaker is open and the rotary handle is in the O (OFF) position.

When the rotary handle is in the I (ON) position or the Trip position, the door interlock prevents you from opening the door. To open the door, you must turn the handle to the O (OFF) position.

Under exceptional circumstances, qualified electrical personnel can follow these steps to open the door while the rotary handle is in the I (ON) position or the Trip position:

Step	Action
1	Using a screwdriver, turn the locking screw clockwise by 10 to 15 degrees and then hold the screwdriver in place.
2	Still holding the screwdriver in place, open the door and then release the locking screw.

To close the door, use a screwdriver to turn the locking screw clockwise by 10 to 15 degrees. Holding the screwdriver in place, close the door and then release the locking screw.