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

Definitions

While operating the circuit breaker, 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 Active control unit has detected an alarm:

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

  • For a medium severity alarm, the status bar 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 Active control unit HMI, by the trip cause LEDs or the status bar. 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

Active alarms can also be consulted in the following ways:

• On a smartphone with EcoStruxure Power Device app connected to the MicroLogic Active control unit through USB OTG connection.

• On EcoStruxure Power Commission software connected to the MicroLogic Active control unit through USB connection.

• On Panel Server webpages and on remote controllers connected to Panel Server, through IEEE 802.15.4 wireless communication (MicroLogic Active AP/EP control unit only).

Identifying the Cause of a Trip or Alarm Using the MicroLogic Active 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. When the blue fault-trip reset button is popped out, the trip has occurred.

• The indicators on the MicroLogic Active control unit.

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

  • Through NFC

  • Through USB OTG connection

A Blue fault-trip reset button

B Trip cause LEDs

C Ready LED

D Status bar

E MicroLogic Active display screen

Availability of Diagnostic Data After a Trip

Diagnostic data is available when the MicroLogic Active control unit is powered.

If the MicroLogic Active control unit power supply is interrupted, use a Mobile Power Pack to enable access to diagnostic data. Connect the Mobile Power Pack to the MicroLogic Active control unit USB-C port.

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

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

• If the MicroLogic Active 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 are powered by the MicroLogic Active internal battery and remain on for 2 hours when there is no other power to the control unit. To switch on the trip cause LEDs again after 2 hours, press the button.

Trip and Alarm Display Screen Examples

Three types of pop-up message are displayed, depending on the severity of the event.

Message type	Description	Example
Trip	Trip message is displayed on a red screen.
High severity alarm	Alarm message is displayed on a red screen.
Medium severity alarm	Alarm message is displayed on an orange screen.

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.

The related trip cause LEDs blink in red.

Description	Display screen	Status and Trip cause LED display	Status and Trip cause LED description
Electrical fault on the network	Trip message is displayed on a red screen.		Ready LED: green flashing Status bar: red blinking ERMS LED: off Related trip cause LED: red blinking
Major MicroLogic Active control unit incident detected during self-test	Trip message is displayed on a red screen.		Ready LED: off Status bar: red blinking ERMS LED: off All trip cause LEDs: red blinking

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

The circuit breaker has not tripped, but the MicroLogic Active status bar is on.

The L trip cause LED may be red.

Description	Display screen	Status and Trip cause LED display	Status and Trip cause LED description
High severity alarm	Alarm message is displayed on a red screen.		Ready LED: green flashing Status bar: red on ERMS LED: off All trip cause LEDs off
Overload alarm: phase current > 105% Ir	Alarm message is displayed on a red screen.		Ready LED: green flashing Status bar: red on ERMS LED: off L trip cause LED: on
Medium severity alarm	Alarm message is displayed on an orange screen.		Ready LED: green flashing Status bar: orange on ERMS LED: off All trip cause LEDs off
Overload pre-alarm: 90% Ir < Current < 105% Ir	Alarm message is displayed on an orange screen.		Ready LED: green flashing Status bar: orange on ERMS LED: off L trip cause LED: red on