Replace MicroLogic Active Control Unit

Safety Instructions

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. Manufacturer maintenance and repair activities must be conducted only by accredited Schneider Electric Services representatives or accredited Schneider Electric certified partners. Accreditation requires attending Manufacturer training at one of the Schneider Electric training centers. Unless specified otherwise in the maintenance procedures, all operations (inspection, test, and preventive maintenance) must be carried out with the device, the chassis, and the auxiliary circuits de-energized. Check that the device and the chassis are de-energized on the upstream and downstream terminals. Always use a properly rated voltage sensing device to confirm that the device, the chassis, and the auxiliary circuits are de-energized. Install safety barriers and display a danger sign. During the tests, it is strictly forbidden for anyone to touch the device, the chassis, or the conductors while voltage is applied. Before turning on power to this equipment, check that all connections are made with the correct tightening torque and the device is open (OFF position). Before turning on power to this equipment, put all devices, doors, and covers back in place. 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.
Manufacturer maintenance and repair activities must be conducted only by accredited Schneider Electric Services representatives or accredited Schneider Electric certified partners. Accreditation requires attending Manufacturer training at one of the Schneider Electric training centers.
Unless specified otherwise in the maintenance procedures, all operations (inspection, test, and preventive maintenance) must be carried out with the device, the chassis, and the auxiliary circuits de-energized.
Check that the device and the chassis are de-energized on the upstream and downstream terminals.
Always use a properly rated voltage sensing device to confirm that the device, the chassis, and the auxiliary circuits are de-energized.
Install safety barriers and display a danger sign.
During the tests, it is strictly forbidden for anyone to touch the device, the chassis, or the conductors while voltage is applied.
Before turning on power to this equipment, check that all connections are made with the correct tightening torque and the device is open (OFF position).
Before turning on power to this equipment, put all devices, doors, and covers back in place.
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.

Procedure Definition

Procedure characteristics	Description
Action	Remove a MicroLogic Active control unit from a MasterPacT circuit breaker and install a replacement one.
Goal	Replace a MicroLogic Active control unit.
Frequency	On demand
Special indications	–
Necessary tools	PZ1 screwdriver Thin flat-headed screwdriver Adjustable external AC/DC power supply Torx T20 screwdriver
Reference documents	DOCA0284•• MasterPacT MTZ1 IEC Circuit Breakers with MicroLogic Active Control Unit - User Guide DOCA0285•• MasterPacT MTZ2/MTZ3 IEC Circuit Breakers with MicroLogic Active Control Unit - User Guide DOCA0306•• MasterPacT MTZ IEC Circuit Breakers with MicroLogic Active Control Unit - End-User Maintenance Procedures

Removal Procedure

DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH Do not damage any wire in a wiring loom. Any damage may require the replacement of the wiring loom or the breaking block. Failure to follow these instructions will result in death or serious injury.

CAUTION
DISCONNECTED OR LOOSE WIRES While removing a terminal block, pull it by holding the sides, not the wires. Failure to follow these instructions can result in injury or equipment damage.

The following procedure applies to MasterPacT MTZ1 and MasterPacT MTZ2/MTZ3 circuit breakers, unless otherwise indicated.

Step	Action	Illustration
1	Before working on the equipment, prepare the MasterPacT MTZ1 circuit breaker or MasterPacT MTZ2/MTZ3 circuit breaker.	There is no need to unscrew the terminal blocks cover.
2	Remove and dispose of the battery in accordance with end-of-life instructions.
3	Unscrew the two screws of the MicroLogic Active control unit by using a Torx T20 screwdriver.
4	Carefully extract the MicroLogic Active control unit. There is no need to remove the performer and sensor plugs.
5	For MicroLogic Active AP/EP control units, unclip the optional microswitch connector on the top left side, on the back of the control unit.
6	Unclip the connector on the bottom left side on the back of the MicroLogic Active control unit, by pressing the connector clip. Extract the wiring from its housing and keep it for installation of the new MicroLogic Active control unit.
7	Dispose of the MicroLogic Active control unit in accordance with the end-of-life instructions.

Installation Procedure

DANGER
hazard of electric shock, explosion, or arc fLASh Do not damage the wires in a wiring loom. Any damage may require the replacement of the wiring loom or the breaking block. Tighten the MicroLogic Active control unit screws to a torque of 0.8 +/-0.1 N•m (7.1 +/-0.9 lb-in). Failure to follow these instructions will result in death or serious injury.

The following procedure applies to MasterPacT MTZ1 and MasterPacT MTZ2/MTZ3 circuit breakers, unless otherwise indicated.

Step	Action	Illustration
1	Check the commercial reference of the MicroLogic Active control unit.
2	Remove the battery strip to activate the battery, as described in the instruction sheets for MasterPacT MTZ circuit breakers.
3	Check the battery by using the button
4	Clip the connector on the bottom left side on the back of the MicroLogic Active control unit. Route the wiring through its housing.
5	For MicroLogic Active AP/EP control units, if the optional microswitch connector was installed, clip the microswitch connector on the top left side, on the back of the MicroLogic Active control unit.
6	Carefully install the MicroLogic Active control unit onto the base without damaging or pinching the wires.
7	While applying pressure to the control unit, progressively tighten the top and bottom MicroLogic Active screws by using a Torx T20 screwdriver: Perform one turn on the bottom screw, then one turn on the top screw. Repeat until the screws are tightened to a torque of 0.8 +/-0.1 N•m (7.1 +/-0.9 lb-in).
8	Reinstall the terminal block cover if it was removed during the Removal Procedure.
9	Perform a manual opening/closing of the circuit breaker, (follow procedure Mechanism NII_ZA_1 in MasterPacT MTZ IEC Circuit Breakers with MicroLogic Active Control Unit - End-User Maintenance Procedures).
10	Reinstall the front cover of the circuit breaker.