Checking and Replacing the Internal Battery

Checking the MicroLogic A Internal Battery

Press and hold on the trip unit to check the trip cause indication LEDs and the battery. The battery information is displayed if the trip unit is equipped with an external power supply or if the circuit breaker is ON.

	Battery charged
	Battery half charged
	Change battery

NOTE: If no information appears on the screen, check that a battery is installed in the trip unit or connect an auxiliary power supply. For more information about power supplies, refer to MicroLogic Display.

Checking the MicroLogic E Internal Battery

Press and hold down on the trip unit to check the trip cause indication LEDs and the battery. The battery information is displayed if the trip unit is equipped with an external power supply or if the circuit breaker is ON.

The battery charge level is displayed as a percentage (100 %, 80 %, 60 %, 40 %, 20 % or 0 %).

Internal Battery

If the MicroLogic A/E battery needs to be changed, order a new battery in its housing cover with the Schneider Electric catalogue number 33593.

Lithium battery
1/2 AA, 3.6 V, 900 mA/h
Ambient temperature: -55 °C to 130 °C (-67 °F to 266 °F)

Replacing the Internal Battery

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. Put back 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.
Put back 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 this procedure to replace the internal battery:

Remove the circuit breaker front cover as directed in the circuit breaker instruction sheet.
Remove the battery and its housing cover: insert a small screwdriver blade into battery housing cover notch and rotate to slide battery housing cover out of trip unit.
Put the new battery and its housing cover back in place.
Press to check the new battery.

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

DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH Put back 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.