Locking the Circuit Breaker - ComPacT NSXm User Guide

Locking Options for the Front Extended 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 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.

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.

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) (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.)
I (ON) or O (OFF) (Black door operator only)

Inserting Padlocks in the 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.

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 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 anti-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 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.