Finding the Cause of a Trip or an Alarm in Critical Cases

Definitions

While operating the device, the user may face two critical cases:

• The circuit breaker has tripped automatically, interrupting the power supply.

• The circuit breaker has not tripped, but the MicroLogic X control unit has detected an alarm:

  • For a high severity alarm, the service LED is red, indicating that urgent corrective action is required.

  • For a medium severity alarm, the service LED is orange, indicating that corrective action needs to be scheduled.

Notification of a Trip or Alarm

A trip or alarm event is signaled:

• On the MicroLogic X control unit HMI, by the trip cause LEDs or the service LED. When the control unit is powered, a red or orange pop-up message is displayed on the screen.

• By the SDE fault-trip indication contact

Depending on the options installed, a trip or alarm can also be signaled:

• By an additional SDE2 fault-trip indication contact

• By the outputs of the M2C programmable contacts

• By the outputs of an IO application module

• By an email sent through IFE or EIFE Ethernet interface

• On a remote controller connected to the communication network (application customized by user)

• On the FDM128 display

• On the FDM121 display

Active alarms can also be consulted in the following ways:

• On a smartphone with EcoStruxure Power Device app connected to the MicroLogic X control unit:

  • Through Bluetooth

  • Through USB OTG connection

• On EcoStruxure Power Commission software connected to the MicroLogic X control unit:

  • Through USB connection

  • Through IFE or EIFE Ethernet interface

  • Through IFM Modbus-SL interface

A Panel Server gateway

B FDM128 Ethernet display for eight devices

C Ethernet switch

D EIFE embedded Ethernet interface for one MasterPacT MTZ drawout circuit breaker

E IFE Ethernet interface for one MasterPacT MTZ circuit breaker

F IO input/output application module for one circuit breaker

G FDM121 front display module for one circuit breaker

H IO module outputs used for event notification

I ULP port module

J One or two SDE fault-trip indication contacts

K Two optional M2C programmable contacts

L MicroLogic X control unit

M Drawout MasterPacT MTZ circuit breaker

N Fixed MasterPacT MTZ circuit breaker

Identifying the Cause of a Trip or Alarm Using the MicroLogic X Control Unit

In critical situations, the cause of a trip or an alarm can be identified locally by using one of the following:

• The blue fault-trip reset button on the circuit breaker (A). When the trip button is popped out, the trip has occurred.

• The indicators on the MicroLogic X control unit:

  • The Ready LED (B)

  • The service LED (C)

  • The MicroLogic X display screen (D)

  • The trip cause LEDs (E)

• A smartphone with EcoStruxure Power Device app installed to get the trip cause, the trip or alarm context, and the device ID:

  • Through NFC

  • Through Bluetooth

  • Through USB OTG connection

A Blue fault-trip reset button

B Ready LED

C Service LED

D MicroLogic X display screen

E Trip cause LEDs

NOTE: The optional Power Restoration Assistant Digital Module provides assistance with restoring power after a trip. For more information, refer to DOCA0102•• MasterPacT MTZ - MicroLogic X Control Unit - User Guide.

Availability of Diagnostic Data After a Trip

The diagnostic data is available when the MicroLogic X control unit is powered.

If the MicroLogic X control unit is not permanently powered by an external 24 Vdc power source, connect the MicroLogic X control unit to an external power supply, for example, the Mobile Power Pack, through the mini USB port to have access to the diagnostic data.

When the MicroLogic X control unit is powered externally, the availability of diagnostic data depends on the MicroLogic X state:

• If the MicroLogic X control unit is operative, all diagnostic data is available.

• If the MicroLogic X control unit is inoperative, no data is directly available. However, some data can be extracted using the NFC function with the EcoStruxure Power Device app.

The trip cause LEDs and the red service LED are powered by the MicroLogic X internal lithium battery and remain on for 4 hours when there is no other power to the control unit. To switch on the trip cause LEDs or the red service LED again after 4 hours, press the Test/Reset button.

Using the Display Screen and LEDs to Find the Cause of a Trip

The circuit breaker has tripped automatically, interrupting the power supply, and the blue fault-trip reset button has popped out.

Ready LED	Service LED	MicroLogic X display screen	Trip cause LEDs	Description
Ready LED flashing green.	Service LED off.		One of the trip cause LEDs is on red.	Electrical fault on the network
Ready LED off.	Service LED on red.		All LEDs are on.	Major MicroLogic X control unit incident detected during self-test

Using the Display Screen and LEDs to Find the Cause of an Alarm

The circuit breaker has not tripped, but the MicroLogic X control unit service LED is on.

Ready LED	Service LED	MicroLogic X display screen	Trip cause LEDs	Description
Ready LED flashing green or Ready LED off.	Service LED on red.		All LEDs are off or all LEDs are on.	High severity alarm
Ready LED flashing green.	Service LED on orange.		All LEDs are off.	Medium severity alarm