Replacement Procedure

DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E, CSA Z462, NOM 029-STPS or local equivalent. This equipment must only be installed and serviced by qualified electrical personnel. Turn off all power supplying this equipment before working on or inside this equipment. Always use a properly rated voltage sensing device to confirm power is off. Replace all devices, doors, and covers before turning on power to this equipment. Beware of potential hazards, and carefully inspect the work area for tools and objects that may have been left inside the equipment. Failure to follow these instructions will result in death or serious injury.

DANGER

HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH

Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E, CSA Z462, NOM 029-STPS or local equivalent.
This equipment must only be installed and serviced by qualified electrical personnel.
Turn off all power supplying this equipment before working on or inside this equipment.
Always use a properly rated voltage sensing device to confirm power is off.
Replace all devices, doors, and covers before turning on power to this equipment.
Beware of potential hazards, and carefully inspect the work area for tools and objects that may have been left inside the equipment.

Failure to follow these instructions will result in death or serious injury.

Follow these steps to change the rating plug.

Disconnect the circuit breaker as directed in the circuit breaker instruction sheet shipped with the circuit breaker.
Open the protective cover of the trip unit.
Record switch settings.
Unscrew the long-time rating plug mounting screw.
Remove the adjustable rating plug.
Inspect mounting area for debris and contamination.
Take out the replacement rating plug.

NOTE: Adjustable rating plug must be removed when doing dielectric testing. If adjustable rating plug is removed, the circuit breaker will default to a long-time pickup rating of 0.4 x sensor size (In) and a long-time delay of whatever setting was selected before the rating plug was removed.
Gently push in the replacement rating plug.
Tighten the long-time rating plug mounting screw.
Set trip unit settings to values recorded previously or modify settings.

Reinstall the circuit breaker front cover as directed in the circuit breaker instruction sheet shipped with the circuit breaker.

DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH Replace circuit breaker front cover before energizing circuit breaker to help prevent access to live terminals. Do not pinch the wires when reinstalling the front cover. Failure to follow these instructions will result in death or serious injury.