Section 2– Display Options

Front Display Module Functions (FDM121)

The front display module (FDM121) can be integrated in the PowerPacT H-, J-, and L-frame circuit breaker system. It uses the sensors and processing capacity of the MicroLogic trip unit to display measurements, demand, power quality and maximum/minimum values along with alarms, histories, and maintenance indicators.

Display of MicroLogic Trip Unit Measurements and Alarms

The FDM121 is intended to display MicroLogic 5 / 6 trip unit measurements, alarms and operating information. It cannot be used to modify the protection settings. Measurements may be easily accessed through a menu.

All user-defined alarms are automatically displayed. The display mode depends on the priority level selected during alarm set-up:

• high priority: a pop-up window displays the time-stamped description of the alarm and the orange LED flashes

• medium priority: the orange Alarm LED goes steady on l

• low priority: no display on the screen.

All faults resulting in a trip automatically produce a high-priority alarm, without any special settings required. In all cases, the alarm history is updated.

If power to the FDM121 fails, all information is stored in the MicroLogic trip unit non-volatile memory. The data can be consulted using the communication network when power is restored.

When the circuit breaker is equipped with the BSCM module, the FDM121 display can also be used to view circuit breaker status conditions:

• Auxiliary switch (OF): ON/OFF

• Alarm switch (SD): trip indication

• Overcurrent trip switch (SDE): fault-trip indication (overload, short- circuit, ground fault)

Main menu

When powered up, the FDM121 screen automatically displays the ON/OFF status of the device.

When not in use, the screen is not backlit. Backlighting can be activated by pressing one of the buttons. It goes off after 3 minutes.

	Provides access to five screens that display a summary of essential operating information (I, U, f, P, E, THD, circuit breaker On / Off).
	Used to display the measurement data (I, U-V, f, P, Q, S, E, THD, PF) with the corresponding min/max values.
	Displays active alarms and the alarm history
	Provides access to the operation counters, energy and maximum reset function, maintenance indicators, identification of modules connected to the internal bus and FDM121 internal settings (language, contrast, etc.)

Quick viewprovides access to five screens that display a summary of essential operating information (I, V, f, P, E, THD, circuit breaker On / Off).

• Metering can be used to display the measurement data (I, U-V, f, P, Q, S, E, THD, PF) with the corresponding min/max values.

• Alarms displays active alarms and the alarm history

• Services provides access to the operation counters, energy and maximum reset function, maintenance indicators, identification of modules connected to the internal bus and FDM121 internal settings (language, contrast, etc.)

Metering Sub-Menu	Services

Alarms display on the FDM121 according to their order of occurrence. The last active alarm to occur replaces the previous alarm, even if it is still active or has not been acknowledged.

Alarms are recorded in the alarm history.

Alarm indication on the display depends on their priority level.

NOTE: Clear the indication of successive high-priority alarms by pressing the Clear key a number of times in succession (the number of times corresponds to the number of active alarms) in reverse chronological order of their occurrence. View the alarm history to clear the indication of all medium-priority alarms.

An Alarm pop-up screen appears when a high-priority alarm occurs

Alarm Pop-Up Screen Example

The Services menu provides access to the:

• Reset energy meters and measurement minimum and maximum values mode

• FDM121 contrast and brightness setting

• Maintenance indicators (operation counters, load profile, and so on.)

• Intelligent functional unit product identification information

• Language selection for the FDM121 screens