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A-20
Functions
and characteristics
Power Meter functions
Micrologic A/E/P/H control unit
with COM option (BCM ULP)
In addition to protection functions, Micrologic A/E/P/H
control units offer all the functions of Power Meter
products as well as operating-assistance for the circuit
breaker.
Micrologic A/E/P/H measurement functions are made possible by Micrologic
intelligence and the accuracy of the sensors. They are handled by a microprocessor
that operates independent of protection functions.
Display
..................................................................
FDM121 display unit
The FDM121 switchboard display unit can be connected to a Micrologic COM option
(BCM ULP) using a breaker ULP cord to display all measurements on a screen. The
result is a veritable 96 x 96 mm Power Meter.
In addition to the information displayed on the Micrologic LCD, the FDM121 screen
shows demand, power quality and maximeter/minimeter values along with histories
and maintenance indicators.
The FMD121 display unit requires a 24 V DC power supply. The COM option (BCM
ULP) unit is supplied by the same power supply via the breaker ULP cord connecting
it to the FDM121.
Measurements
......................................................
Instantaneous rms measurements
The Micrologic continuously display the RMS value of the highest current of the three
phases and neutral (Imax). The navigation buttons can be used to scroll through the
main measurements.
In the event of a fault trip, the trip cause is displayed.
The Micrologic Ameasures phase, neutral, ground fault currents.
The Micrologic E offers voltage, power, Power Factor, measurements in addition to
the measurements provided by Micrologic A.
The Micrologic P/H offer frequency, cos.
j
in addition to the measurements provided
by Micrologic E.
Maximeters / minimeters
Every instantaneous measurement provided by Micrologic A or E can be associated
with a maximeter/minimeter. The maximeters for the highest current of the 3 phases
and neutral, the demand current and power can be reset via the FDM121 display unit
or the communication system.
Energy metering
The Micrologic E/P/H also measures the energy consumed since the last reset of the
meter. The active energy meter can be reset via Micrologic keypad or the FDM121
display unit or the communication system.
Demand and maximum demand values
Micrologic E/P/H also calculates demand current and power values. These
calculations can be made using a block or sliding interval that can be set from 5 to 60
minutes in steps of 1 minute. The window can be synchronised with a signal sent via
the communication system. Whatever the calculation method, the calculated values
can be recovered on a PC via Modbus communication.
Ordinary spreadsheet software can be used to provide trend curves and forecasts
based on this data. They will provide a basis for load shedding and reconnection
operations used to adjust consumption to the subscribed power.
Power quality
Micrologic H calculates power quality indicators taking into account the presence of
harmonics up to the 15th order, including the total harmonic distortion (THD) of
current and voltage.
DB125911
Alarms
Services
ESC
OK
MainMenu
Quick view
Control
Metering
FDM121 display: navigation.
DB112131
I1
I
%
310 A I2
%
315 A
I3
%
302 A IN
%
23 A
ESC
DB112132
ESC
U
1
U
2
U
3
V
4/7
402V
100 120
%
398V
100 120
%
401V
100 120
%
Current.
Voltage.
DB112133
ESC
P
64 kW
Q
38 kVar
S
51 kVA
PQS
DB112134
ESC
Ep
14397 kWh
Eq
8325 kVarh
Es
13035 kVAh
E
Power.
Consumption.
Examples of measurement screens on the FDM121 display
unit.
version: 10.1
207E2200.indd