6
Specifications are subject to change without notice
WM3-96DS260606
WM3-96
Management concept (multi-time)
(a)
(b)
(c)
Analysis principle
FFT
Harmonic measurement
Current
Up to 50th harmonic
Voltage
Up to 50th harmonic
Type of harmonics
THD (VL1)
THD odd (VL1)
THD even (VL1)
and also for the other phases:
L2, L3.
THD (IL1)
THD odd (IL1)
THD even (IL1)
and also for the other phases:
L2, L3.
Harmonic phase angle
The instrument measures the
angle between the single har-
monic of “V” and the single
harmonic of “I” of the same
order. According to the value
of the electrical angle, it is
possible to know if the distor-
tion is absorbed or generated.
Note: if the system has 3
wires the angle cannot be
measured.
Harmonic details
For every THD page it is pos-
sible to see the harmonic
order.
Display pages
The harmonics content is
displayed as a graph showing
the whole harmonic spectrum.
The information is given also
as numerical information:
THD in % / RMS value
THD odd in % / RMS value
THD even in % / RMS value
single harmonic in % / RMS
value
Others
The harmonic distortion
can be measured in
2-wire, 3-wire or 4-wire
systems.
Tw: 0.02
Harmonic distortion analysis
Time periods
Selectable: single time,
dual time and multi-time
Single time
Number of energy meters
Total: 4 (9-digit)
(no partial meters)
Dual time
Number of energy meters
Total: 4 (9-digit)
Partial: 8 (6-digit)
Time periods
2, programmable within
24 hours
Multi time
Number of energy meters
Total: 4 (9-digit)
Partial: 48 (6-digit)
Time periods
4, programmable
within 24 hours
Time seasons
3, programmable within
12 months
Pulse outputs
Connectable to total and
partial energy meters (Single
time, dual time, multi time
periods)
Energy metering recording
Energy consumption story,
recording of energy metering
by months, oldest data: 2
months before current month.
Recording of total and partial
energy metering
Energy time period management
+Wh, +VArh, –Wh, -VArh
max. 4
Time period (24 hours)
max. 3
Season (12 months)
Partial: up to 48 energy meters (axbxc)
Total: up to 4 energy meters (“a” type)
Example of Multi-time energy metering
trf
trf
end
end
start
start
WINTER
WINTER
1
1
OO:OO
OO:OO O6:OO
O6:OO
2
2
O6:OO
O6:OO O8:OO
O8:OO
3
3
O8:OO
O8:OO 1O:OO
1O:OO
TARIFF
TARIFF
1
1
trf1
24
6
12
18
2
4
8
10
14
16
20
22
trf2
trf2
trf3
trf3
trf4
trf1
trf
trf
WINTER
WINTER
2
2
1O:OO
1O:OO 16:OO
16:OO
3
3
16:OO
16:OO 18:OO
18:OO
4
4
18:OO
18:OO 21:OO
21:OO
TARIFF
TARIFF
1
1
1
1
21:OO
21:OO OO:OO
OO:OO
start
start end
end
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