34 / 248
559E1200.indd
version: 1.0
Functions and
characteristics
Power Meter functions
Electronic Micrologic 5 / 6 A or E
In addition to protection functions,
Micrologic 5 / 6 trip units offer all the
functions of Power Meter products as well
as operating-assistance for the circuit
breaker.
b
display of settings
b
measurement functions:
v
Ammeter (A)
v
Energy (E)
b
alarms
b
time-stamped histories and event tables
b
maintenance indicator
b
communication.
Micrologic A and E 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
..................................................................
Micrologic LCD
The user can display all the protection settings and the main measurements on the
LCD screen of the trip unit.
Micrologic A: instantaneous rms current measurements
b
Micrologic E: voltage, frequency and power measurements and energy metering,
b
in addition to the measurements offered by Micrologic A
To make the display available under all conditions and increase operating comfort,
DQ H[WHUQDO SRZHU VXSSO\ LV UHFRPPHQGHG IRU 0LFURORJLF $
It is indispensable to:
display faults and interrupted current measurements
b
use all the functions of Micrologic E (e.g. metering of low power and energy
b
values)
ensure operation of the communication system.
b
7KH H[WHUQDO SRZHU VXSSO\ FDQ EH VKDUHG E\ VHYHUDO GHYLFHV )RU GHVFULSWLRQ
see
SDJH $
.
FDM121 display unit
An FDM121 switchboard display unit can be connected to a Micrologic trip unit using
a prefabricated cord to display all measurements on a screen. The result is a
YHULWDEOH [ PP 3RZHU 0HWHU
In addition to the information displayed on the Micrologic LCD, the FDM121 screen
VKRZV GHPDQG SRZHU TXDOLW\ DQG PD[LPHWHU PLQLPHWHU YDOXHV DORQJ ZLWK DODUPV
histories and maintenance indicators.
The FMD121 display unit requires a 24 V DC power supply. The Micrologic trip unit is
supplied by the same power supply via the cord connecting it to the FDM121.
PC screen
When the Micrologic, with or without an FDM121 switchboard display unit, is
FRQQHFWHG WR D FRPPXQLFDWLRQ QHWZRUN DOO LQIRUPDWLRQ FDQ EH DFFHVVHG YLD D 3&
Measurements
.....................................................
Instantaneous rms measurements
The Micrologic A and E continuously display the RMS value of the highest current of
WKH WKUHH SKDVHV DQG QHXWUDO ,PD[ 7KH QDYLJDWLRQ EXWWRQV
can be used to
scroll through the main measurements.
In the event of a fault trip, the current interrupted is memorised.
The Micrologic Ameasures phase, neutral, ground fault currents.
The Micrologic E offers voltage, frequency and power measurements in addition to
the measurements provided by Micrologic A
Maximeters / minimeters
Every instantaneous measurement provided by Micrologic A or E can be associated
ZLWK D PD[LPHWHU PLQLPHWHU 7KH PD[LPHWHUV IRU WKH KLJKHVW FXUUHQW RI WKH SKDVHV
and neutral, the demand current and power can be reset via the trip unit keypad, the
FDM121 display unit or the communication system.
Energy metering
The Micrologic E also measures the energy consumed since the last reset of the
meter. The active energy meter can be reset via the keypad and the FDM121 display
unit or the communication system.
Demand and maximum demand values
Micrologic E 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
EH UHFRYHUHG RQ D 3& YLD 0RGEXV FRPPXQLFDWLRQ
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 ad
j
ust consumption to the subscribed power.
Power quality
Micrologic E 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.
3%
Micrologic built-in LCD display showing an energy
measurement.
DB112211
A
l
a
r
m
s
S
ervices
E
S
C
OK
M
a
in Menu
Quic
k V
ie
w
Meterin
g
FDM121 display: navigation.
'%
I1
I
%
3
10 A I2
%
3
15 A
I
3
%
3
02 A IN
%
2
3
A
E
S
C
'%
E
S
C
U
1
U
2
U
3
V
4/
7
402 V
100 120
%
3
98 V
100 120
%
401 V
100 120
%
Current.
Voltage.
'%
E
S
C
P
6
4
k
W
Q
38
kVa
r
S
51
kVA
PQ
S
'%
E
S
C
Ep
1439
7 k
Wh
E
q
83
2
5
kVa
rh
Es
13035
kVA
h
E
Power.
Consumption.
Examples of measurement screens on the FDM121 display
unit.
A-20