Resetting the Circuit Breaker After a Trip Due to an Electrical Fault

Reset Sequence

DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH Do not re-close the device on an electrical fault. First inspect and, if necessary, repair the downstream equipment. Failure to follow these instructions will result in death or serious injury.

The table shows the sequence of actions to follow after a trip due to an electrical fault. Further explanation of each action is given in the following paragraphs.

Step	Action
1	Identify the trip cause.
2	Press OK to view details of the trip cause on the display screen.
3	Consult the two trip cause context screens: Screen 1: Name and settings of the tripping protection, date and time of the trip. Screen 2: Current values recorded before the trip.
4	Clear the electrical fault on the network.
5	Inspect the circuit breaker and switchboard after a short circuit.
6	Press OK to acknowledge the trip cause and return to the Home menu. NOTE: If the trip cause is not acknowledged within the event timeout, the pop-up is displayed again.
7	Reset the circuit breaker.
8	Press the Test/Reset button for 3 seconds to reset the latched events and switch off the trip cause LEDs.
9	When the circuit breaker is ready-to-close, re-close it.

NOTE: You may use the EcoStruxure Power Device app with the Power Restoration Assistant Digital Module to get support while resetting after a trip due to an electrical fault.

Identifying the Trip Cause

Ready LED	Service LED	Description
Ready LED flashing green.	Service LED off.	MicroLogic 2.0 X, 5.0 X, 6.0 X, 7.0 X: trip due to the long-time protection.
		MicroLogic 2.0 X: trip due to the instantaneous protection. MicroLogic 5.0 X, 6.0 X, 7.0 X: trip due to the short-time protection or instantaneous protection.
		MicroLogic 2.0 X, 5.0 X: not used. MicroLogic 6.0 X: trip due to the ground-fault protection. MicroLogic 7.0 X: trip due to the earth-leakage protection.
		MicroLogic 2.0 X, 5.0 X, 6.0 X, 7.0 X: trip due to optional protections.

NOTE: Diagnostic assistance can be obtained by using a smartphone running the EcoStruxure Power Device app.

Clearing the Electrical Fault

DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E or CSA Z462 or local equivalent. This equipment must be installed and serviced by qualified electrical personnel. Turn off all power supplying this equipment before performing maintenance inspections.Assume that all circuits are live until they are de-energized, tested, grounded, and tagged. Consider all sources of power, including the possibility of backfeeding and control power. Always use a properly rated voltage sensing device to confirm that 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 or CSA Z462 or local equivalent.
This equipment must be installed and serviced by qualified electrical personnel.
Turn off all power supplying this equipment before performing maintenance inspections.Assume that all circuits are live until they are de-energized, tested, grounded, and tagged. Consider all sources of power, including the possibility of backfeeding and control power.
Always use a properly rated voltage sensing device to confirm that 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 Do not re-close the device on an electrical fault. First inspect and, if necessary, repair the downstream equipment. Failure to follow these instructions will result in death or serious injury.

The feed must be isolated before inspecting the electrical equipment downstream of the protection.

The fact that a circuit breaker has tripped does not remedy the cause of the electrical fault detected on the downstream electrical equipment.

Inspecting the Circuit Breaker and Switchboard After a Trip on Short Circuit

After a trip on short circuit due to short-time or instantaneous protection, the circuit breaker and switchboard must be inspected for smoke deposits or cracks in the device casing.

Refer to DOCA0099•• MasterPacT MTZ - IEC Switch-Disconnectors and Circuit Breakers with MicroLogic X Control Unit - Maintenance Guide and contact your Schneider Electric Services representative.