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Universal Remote Control MX-880Z - SPECS SHEET Información técnica Pagina 31

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™
Masterpact™ NT and NW Universal Power Circuit Breakers
Micrologic™ Electronic Trip Systems
31
05/2014
© 2000–2014 Schneider Electric
All Rights Reserved
Micrologic 5.0H & 6.0H Trip Units with Harmonic Metering
In addition to the P functions, the Micrologic H trip units offer:
•
In-depth analysis of power quality including calculation of harmonics and the fundamentals.
•
Diagnostics aid and event analysis through waveform capture.
•
Customized alarm programming to analyze and track down a disturbance on the ac power system.
•
Systematic time stamping of all events and creation of logs.
Metering
The Micrologic H trip unit offers all the measurements carried out by the Micrologic P trip unit, with the
addition of phase-by-phase measurements of power and energy as well as calculation of:
•
Current and voltage total harmonic distortion (THD, thd).
•
Current, voltage and power fundamentals (50/60 Hz).
•
Harmonic components (amplitude and phase) up to the 31st current and voltage harmonic.
Real-Time Metering: The value displayed on the screen is refreshed every second. The table below
shows what is measured in real-time metering.
Demand Metering: Similar to the Micrologic P trip unit, demand values are calculated over a fixed or
sliding time window that can be set from five to 60 minutes.
Waveform Capture
Micrologic H trip units can capture and store current and voltage waveforms using digital sampling
techniques similar to those used in oscilloscopes. Using the information available in the captured
waveform, it is possible to determine the level of harmonics as well as the direction and amplitude of
the flow of harmonic power.
Users of Micrologic H trip units can record manually via the keypad the following waveforms:
•
The four currents: I
a
, I
b
, I
c
, and I
N
•
The three phase-to-phase voltages: V
ab
, V
bc
, and V
ca
Micrologic 6.0H Trip Unit
Type of Measurement Unit of Measurement Measurement Source
Current
I
RMS
I
AVERAGE
I
PEAK/÷2
I
IMBALANCE
A
A
A
%
ØA, ØB, ØC or N
(ØA + ØB + ØC) / 3
ØA, ØB, ØC or N
ØA, ØB, ØC or N
Voltage
V
RMS
V
RMS
V
IMBALANCE
V
V
%
(ØA–ØB), (ØB–ØC) and (ØC–ØA)
(ØA–N), (ØB–N) and (ØC–N)
V
RMS
Power
P, Q and S
EP, EQ and ES
Power factor
W, VAR, VA
Wh, VARh, VAh
Total
Total
Total
Frequency F Hz ØA, ØB, or ØC
Power Quality
Indicators
Fundamentals
THD
V and I harmonics
50/60 Hz component
%
Amplitude to phase
V, I, P, Q, and S
V/I
1, 2, 3, 4...50
Type of Measurement Unit of Measurement Measurement Source
Current I
DEMAND
A ØA, ØB, ØC or N
Power P, Q and S
DEMAND
W, VAR, VA Total
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