Brochure

PowerPact H-, J-, and L-Frame Circuit Breakers

Energy Management

FDM121 Display

Micrologic trip unit measurement capabilities come into full play with the FDM121 display. It connects

with a circuit breaker ULP cord and displays the Micrologic trip unit information. The result is a true

integrated unit combining a circuit breaker and a power meter. Additional operating assistance

functions can also be displayed.

An FDM121 display unit can be connected to ULP communication devices using a prefabricated cord

to display all measurements, alarms, histories and event tables, maintenance indicators, and

management of installed devices on a screen.

The FMD121 display unit requires a 24 Vdc power supply.

The FDM121 is a display that can be integrated with the PowerPact H/J/L/P/R or Masterpact NW/NT

circuit breaker systems. It uses the sensors and processing capacity of the Micrologic trip unit. It is

easy to use and requires no special software or settings. It is immediately operational when connected

to the circuit breaker by a ULP cord.

It also provides monitoring and control with the use of the I/O application module, the motor

mechanism module, or the circuit breaker communication module.

The FDM121 has a large display, but requires very little depth. The anti-glare graphic screen is backlit

for very easy reading even under poor ambient lighting and at sharp angles.

Display of Micrologic Trip Unit Measurements and Alarms

The FDM121 is intended to display Micrologic trip unit measurements, alarms and operating

information. It cannot be used to modify the protection settings.

Measurements can be easily accessed using 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

Alarm LED flashes;

•

medium priority: the orange Alarm LED goes continuously on;

•

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. The Micrologic trip unit saves the information in its

non-volatile memory in the event of an FDM121 power loss.