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Technical
Section 11
Dimensions
Section 12
8
Power Meter functions
Electronic Micrologic 5E
Functions and
characteristics
Micrologic 5 / 6 integrated Power Meter functions
Display
E
Micrologic
LCD
FDM121
display
Display of protection settings
Pick-ups (A) and
delays
All settings can be displayed
Ir, tr, Isd, tsd, Ii, Ig, tg
b
b
Measurements
Instantaneous rms measurements
Currents (A)
Phases and neutral
I1, I2, I3, IN
b
b
b
Average of phases
Iavg = (I1 + I2 + I3) / 3
b
-
b
Highest current of the 3 phases and
neutral
Imax of I1, I2, I3, IN
b
b
b
Ground fault (Micrologic 6)
% Ig (pick-up setting)
b
b
b
Current unbalance between phases % Iavg
b
-
b
Voltages (V)
Phase-to-phase
U12, U23, U31
b
b
b
Phase-to-neutral
V1N, V2N, V3N
b
b
b
Average of phase-to-phase voltages Uavg = (U12 + U21 + U23) / 3
b
-
b
Average of phase-to-neutral
voltages
Vavg = (V1N + V2N + V3N) / 3
b
-
b
Ph-Ph and Ph-N voltage unbalance % Uavg and % Vavg
b
-
b
Phase sequence
1-2-3, 1-3-2
b
b
b
Frequency (Hz)
Power system
f
b
b
b
Power
Active (kW)
P, total / per phase
b
b
b
Reactive (kVAR)
Q, total / per phase
b
b
b
Apparent (kVA)
S, total / per phase
b
b
b
Power factor and cos
j
(fundamental) PF and cos
j
, total and per phase
b
-
b
Maximeters / minimeters
Associated with instantaneous rms
measurements
Reset via Micrologic or FDM121
display unit
b
-
b
Energy metering
Energy
Active (kW), reactive (kVARh),
apparent (kVAh)
Total since last reset
b
b
b
Absolute or signed mode
(1)
Demand and maximum demand values
Demand current (A)
Phases and neutral
Present value on the selected window
b
-
b
Maximum demand since last reset
b
-
b
Demand power
Active (kWh), reactive (kVAR),
apparent (kVA)
Present value on the selected window
b
-
b
Maximum demand since last reset
b
-
b
Calculation window
Sliding, fixed or com-synchronised Adjustable from 5 to 60 minutes in 1
minute steps
b
-
(2)
Power quality
Total harmonic
distortion (%)
Of voltage with respect to rms value THDU,THDV of the Ph-Ph and Ph-N
voltage
b
-
b
Of current with respect to rms value THDI of the phase current
b
-
b
(1) Absolute mode: E absolute = E out + E in; Signed mode: E signed = E out - E in.
(2) Available via the communication system only.
Additional technical characteristics
Measurement accuracy
Accuracies are those of the entire measurement system, including the sensors:
b
b
Current: Class 1 as per IEC 61557-12
b
b
Voltage: 0.5 %
b
b
Power and energy: Class 2 as per IEC 61557-12
b
b
Frequency: 0.1 %