DOCA0095EN

Locking a Circuit Breaker with a Front Extended Rotary Handle

Locking Options for the Front Extended 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 extended rotary handle offers the following locking options:

  • Prevent the door from being opened

  • Prevent the rotary handle from being operated

  • Prevent the circuit breaker itself from being operated

The handle can be locked in the O (OFF) position or, in the case of the black door operator, in the 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 door operator 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 there is a fault detection, 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)
(Black door operator only)

Padlocking after modification of the door operator during installation

Up to 3 padlocks (not supplied)

Diameter 4–8 mm (3/16–5/16 in.)

Inserting Padlocks in the Extended Rotary Handle

Step

Action

Comment

1

With the handle in the O (OFF) or I (ON) position, pull the cover on the front of the handle until you hear a click.

A space opens between the handle and the cover.

2

Insert the padlocks in the space.

Locking the Circuit Breaker with an Extended Rotary Handle in the O (OFF) Position When the Door is Open

The following procedure explains how to lock the circuit breaker itself, instead of the handle.

Step

Action

Comment

1

With the circuit breaker in the O (OFF) position, turn the locking plate counter-clockwise by 60 degrees to align the holes for the lock.

2

Put a padlock or safety lockout hasp (4–8 mm, 3/16–5/16 in.) in the hole to lock the circuit breaker in the O (OFF) position.

Overriding the Extended 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.

An interlock between the door and the circuit breaker position 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 60 degrees and hold the screwdriver in place.

2

Open the door.

To close the door, use a screwdriver to turn the locking screw clockwise by 60 degrees. Holding the screwdriver in place, close the door and then release the locking screw.

QR code for this page

Was this helpful?