DOCA0095EN

Locking a Circuit Breaker with a Direct Rotary Handle

Locking Options for 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 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 (see Related Documents).

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.

Locked Position

Lock Type

Lock Characteristics

Lock Image

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.)

Inserting Padlocks in the PowerPact B Rotary 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 Rotary Handle 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 the door to be opened 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 the door from opening. To open the door, the handle must be turned 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 10-15 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 10-15 degrees. Holding the screwdriver in place, close the door and then release the locking screw.

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