Specifications are subject to change without notice WM2-96DS0303
1
Class 1 (current/voltage)
Modular power analyzer
Front size: 96x96 mm
3-dgt/6-dgt P-based indicator
Manual or automatic scrolling of system and
single phase: kW, kVAr, PF, kWh, kVArh, A, V
L-L
avg,
VL1-N, VL2-N, VL3-N.
TRMS measurement of distorted waves (voltage/current)
All configuration functions selectable by
built-in key-pad
Password protection of programming parameters
Degree of protection (front): IP 65
Optional pulse output (according to DIN43864)
Optional serial RS 422 /485 port
MODBUS, JBUS protocol.
Product Description
Model
Range code
System
Power supply
1st output
2nd output
Ordering Key WM2-96 AV53DXXX
P-based modular power
analyzer with a built-in con-
figuration key-pad. The pow-
er, power factor, current and
voltage are system and sin-
gle phase measurements and
indications. The housing is
easy to mount on a panel
and ensures a degree of pro-
tection (front) of IP 65.
Energy Management
Modular Power Analyzers
Type WM2-96
Type Selection
System
3:
One phase,
three-phase system,
3 or 4 wires, balan-
ced load;
three phase system,
3 or 4 wires, unba-
lanced load
Range code
AV5:
250/433 VAC - 5 AAC
(max. 300 V (L-N)/
520 V (L-L) - 6 A)
AV7:
400/690 VAC - 5 AAC
(max. 480 V (L-N)/
830 V (L-L) - 6 A)
1)
Power supply
A:
24 VAC, -15% +10%,
50/60 Hz
1) 2)
B:
48 VAC, -15%+10%,
50/60 Hz
1) 2)
C:
115 VAC, -15%
+10%, 50/60 Hz
1) 2)
D:
230 VAC, -15%
+10%, 50/60 Hz
(standard)
2)
L:
18 to 60 VDC/AC
3)
H:
90 to 260 VDC/AC
3)
1st output (pulse)
XX:
No output (standard)
O1:
Single open collector
output (30V/100mADC)
1)
O2:
Dual open collector output,
the second one is the copy
of the first one, like "O1"
1)
R1:
Single relay output,
(AC1-8AAC, 250VAC)
1)
R2:
Dual relay output,
the second one is the copy
of the first one, like "R1"
1)
2nd output
X:
No output (standard)
S:
Serial port, RS 485
multidrop bidirec-
tional
1)
Rated input
Current
2 inputs (one/three-phase
balanced load)
6 inputs (one/three-phase
unbalanced load)
Voltage
2 inputs (one/three-phase
balanced load)
4 inputs (one/three-phase
unbalanced load)
Insulation
among the voltage and the
current inputs: 2000Vrms;
among the current inputs:
2000 Vrms
Temperature drift
250 ppm/C
Display
Backlighted LCD, h 13mm,
3-dgt (instantaneous meas.)
6-dgt (energies)
Input Specifications
Accuracy (48 to 62 Hz)
Un: 250V (AV5), 400V (AV7)
In: 5A
Voltage/current
(@ 25C 5C, R.H.
60%)
0.5% f.s. (0 to 1.2 In,
0.5 to 1.2 Un)
Active power
(@ 25C 5C, R.H.
60%)
1% f.s. (PF
0.7 L/C,
0 to 1.2 In, 0.5 to 1.2 Un)
Reactive power
(@ 25C 5C, R.H.
60%)
1% f.s. (PF
0.7 L/C,
0 to 1 In, 0 to 1 Un)
Power factor (PF)
(@ 25C 5C, R.H.
60%)
1% f.s., PF
0.7 L/C,
(0.6 to 1.2 In, 1 to 1.2 Un)
Energy
1% RDG (kWh), 2% RDG
(@ 25C 5C, R.H.
60%)
(kvarh), (PF
0.7L/C, 0 to
1.2 In, 0.5 to 1.2 Un)
Additional errors
Humidity
< 0.3% f.s., 60% to 90% R.H.
Power supply
0.5% rdg, -15 +10% p.s.
Magnetic field
< 0.1% f.s. @ 400 A/m
1)
On request
2)
Warning: this power supply cannot be used if the
RS485 module is needed
3)
Compatible with any kind of output
2
Specifications are subject to change without notice WM2-96DS0303
WM2-96
Pulse output (on request)
Number of outputs
1, independent
Static type
From 0.1 to 999.9 pro-
(according to DIN 43864)
grammable pulses for kWh,
KVArh, open collector (NPN
transistor)
V
ON
1.2 VDC/ max. 100 mA
V
OFF
30 VDC max.
Relay type
1 x SPDT
AC 1 - 8A, 250VAC
DC 12 - 5A,24VDC
AC 15 - 2.5A, 250VAC
DC 13 - 2.5A, 24VDC
Pulse duration
200 ms (ON),
200 ms (OFF)
Insulation
By means of optocouplers,
4000 V
rms
output to
measuring input,
4000 V
rms
output to
supply input.
Serial port (on request)
Type
RS422/RS485;
Multidrop bidirectional (static
and dynamic variables)
Connections
4 wires, max. distance
1200m, termination directly
on the module
Addresses
1 to 255, selectable
by key-pad
Protocol
MODBUS/JBUS
Data (bidirectional)
Dynamic (reading only)
System variables:
P, Q, PF, V
L-L
,
energies,
Single phase variables:
P
L1
, Q
L1,
PF
L1
, V
L1-N
, A
L1
,
P
L2
, Q
L2
, PF
L2
, V
L2-N
, A
L2
,
P
L3
, Q
L3
, PF
L3
, V
L3-N
, A
L3
Static (writing only)
All programming data, reset
of energy:
- partial kWh
- partial kVArh
- total kWh
- total kVArh
Stored energy (EEPROM)
999999 kWh
999999 kVArh
Data format
1-start bit, 8-data bit, no
parity/even parity, 1 stop bit
Baud-rate
1200, 2400, 4800 and 9600
selectable bauds
Insulation
By means of optocouplers,
4000 Vrms output to
measuring inputs
4000 Vrms output to
supply input
Output Specifications
Decimal point position
Instantaneous measurements:
Automatic selection accord-
ing to the current trans-
former ratio of the CT being
connected (max. indication -
single phase):
CT ratio
5 : 11.11 (25.00A)
CT ratio
50.0: 111.1 (250.0A)
CT ratio
500.0 : 1111 (2500A)
CT ratio
999.9 : 11110 (6000A)
Energy measurements:
max. resolution:1 Wh/1 VArh
min. resolution: 1 kWh/1 kVArh
Max. and min. indication
Voltage
Max. 600
min. 0
Current (CT ratio = 1)
Max. 6.00
min. 0.00
PF
Max. 1.00
min. 0.00
Power (CT ratio = 1)
Max. 5.40
min. 0.00
Active energy
Max. 999999 min. 199999
Reactive energy
Max. 999999 min. 0
Sampling rate
3 times / second
Measurements
System variables
kW, kVAr, PF, V
L-L
, A,
Total energies
kWh, kvarh
Partial energies
kWh, kvarh
(the meters are reset
automatically when the
values reach 14999*CT ratio)
Single phase variables
kW, kVAr, PF, V
L-N
, A
Measurement method
TRMS measurement of a dis-
torted voltage/current wave
Coupling type: Direct
Crest factor:
3
Ranges (impedances)
250 V/433 V (
400k)
5 AAC (
0.3 VA / 0.1)
400V/690V (
650k)
Frequency range
48 to 62 Hz
Over-load protection
Un: 250V (AV5), 400V (AV7)
In: 5A
Continuous: voltage/current
1.2 Un /In
For 1 s
Voltage:
2 Un
Current:
20 In
Keyboard
4 keys:
"
":
- to enter programming
phase and password con-
firmation;
- for value programming
and basic measurement
scrolling.
"L":
- for confirmation of new
programmed values and
going ahead to the next
programming step,
- single phase measure-
ment scrolling.
"R":
- for the reset of the partial
counted active and/or
reactive energy.
Input Specifications (cont.)
Specifications are subject to change without notice WM2-96DS0303
3
WM2-96
Password
Numeric code of max. 3 di-
gits; 2 protection levels of
the programming data
1st level
Password "0", no protection
2nd level
Password from 1 to 255, all
data are protected
Measurement scrolling
System:
Active power (kW),
reactive power (kVAr),
power factor (cos
),
current (A),
average phase-phase volt-
age (V)
total and partial active ener-
gy (kWh),
total and partial reactive
energy (kVArh)
Partial energy meters:
the counters of kWh and
kVArh are automatically
reset when the energy
reaches the value
(14999*CT).
Example: the CT is a
100A/5A so the ratio is 20,
consequently the maximum
counted energy is 299980
kWh or kVArh.
Single phase:
Active power (kW),
reactive power (kVAr),
power factor (cos
),
current (A),
phase-neutral voltage (V)
Transformer ratio
For CT up to 5000 A
Programmable ratio
0.1 to 999.9
Digital Filter
Filter operating range
0 to 100% of the
input electrical scale
Filtering coefficient
1 to 64
Filter action
On the display and on the
variable being transmitted
by the serial communication
port.
Software Functions
AC voltage
230 VAC (standard),
-15%+10% 50/60 Hz
24 VAC, 48 VAC, 115 VAC
(on request),
-15%+10% 50/60 Hz
18 to 60VDC/AC
90 to 260VDC/AC
Power consumption
30VA / 12W (90 to 260V)
20VA / 12W (18 to 60V)
Supply Specifications
Operating temperature
0 to +50C (32 to 122F)
(R.H. < 90% non-condensing)
Storage temperature
-10 to +60C (14 to 140F)
(R.H. < 90% non-condensing)
Insulation reference voltage
300 Vrms to ground
Insulation
4000 Vrms between all inputs/
outputs to ground
Dielectric strength
4000 Vrms for 1 minute
Noise rejection
CMRR
100 dB, 48 to 62 Hz
EMC
EN 50081-2, EN 50082-2
Safety standards
IEC 61010-1, EN 61010-1
Other standards
Pulse output: DIN43864
Approvals
CE
UL, CSA
Connector
Screw-type,
max. 2.5 mm
2
wires x 2
Housing
Dimensions
96 x 96 x 140 mm
Material
ABS,
self-extinguishing: UL 94 V-0
Degree of protection
Front: IP65
Weight
Approx. 500 g
(packing included)
General Specifications
4
Specifications are subject to change without notice WM2-96DS0303
WM2-96
Mode of Operation
Accuracy class of the instrument as a relation of P
I/
P
n
and cos
(power factor)
Test conditions:
V = 0.8 to 1.2 Un,
I = 0.1 to 1.2 In,
f = 48 to 62 Hz
Input
Star Delta
Current
voltage
voltage
AV5
Un: 250 V
Un: 430 V
In: 5 A
P
I
/Q
I
(installation power)
One phase system:
P
I
= U
I
I
I
cos
Q
I
= U
I
I
I
sin
Three phase, 3-wire system:
P
I
=
3 U
I
I
I
cos
Q
I
=
3 U
I
I
I
sin
Three phase, 4-wire system:
P
I
= 3 U
I
I
I
cos
Q
I
= 3 U
I
I
I
sin
where:
U
I
= the real star voltage of
the electrical system being
measured.
I
= the maximum phase cur-
rent of the electrical system
being measured.
Cos
= the average
cos
of
the electrical system being
measured.
Pn /Qn (rated power of the
instrument):
One phase system:
P
n
= Q
n
= U
n
I
n
CT(ratio)
Three phase, 3-wire system:
P
n
= Q
n
=
3 U
n
I
n
CT(ratio)
Three phase, 4-wire system:
P
n
= Q
n
= 3 U
n
I
n
CT(ratio)
where:
U
n
= the rated input voltage
of WM2-96.
I
n
= the rated input current of
WM2-96.
CT (ratio)
= the value of the
current transformer ratio.
Example 1:
Model AV5.3 (3-wire system).
U
I
=
400 V (delta voltage)
I
I
= 265 A (single phase cur-
rent)
Cos
= 0.85 (system power
factor) (CT=300A)
U
n
= 430 V
I
n
= 5 A
CT (ratio) =
300
= 60
5
P
I
=
3 U
I
I
I
cos
=
3 400 265 0.85
= 155.87 kW
P
n
=
3 U
n
I
n
CT (ratio)
=
3 430 5 60
= 233.17 kW
P
I
=
155.87
= 0.698
P
n
223.17
Example 2:
Model AV5.3 (4-wire system).
U
I
=
230 V
I
I
= 110 A (CT=300A)
Cos
= 0.85 (sin
= 0.52)
U
n
= 250 V
I
n
= 5 A
CT (ratio) =
300 A
= 60
5 A
Q
n
= 3 U
I
I
I
sin
= 3 230 110 0.52
= 39.46 kvar
Q
n
= 3 U
n
I
n
CT (ratio)
= 3 250 5 60
= 225 kvar
P
I
=
39.46
= 0.175
P
n
225
In both examples the accura-
cy of the measurement is
1% f.s. when considering the
changing of the measured
voltage from 0.9 Un to 1 Un
and the measured current
from 0.1 In to 0.9 In with a
cos
of 0.85 (sin 0.52).
P
I
/ P
n
1%
2%
1%
2%
5%
Q
I
/ Q
n
Active Power
Reactive Power
Test conditions:
V = 0.8 to 1.2 Un,
I = 0.1 to 1.2 In,
f = 48 to 62 Hz
Specifications are subject to change without notice WM2-96DS0303
5
WM2-96
Wiring Diagrams
Single phase input connections
L
1
N
L1
N
L3
L2
U
1
3
5
2
4
6
I
L1
L2
L3
8
7
10
9
L
1
N
L1
N
L3
L2
U
1
3
5
2
4
6
I
L1
L2
L3
8
7
10
9
CT connection
Direct connection
Three phase 3-wire input connections - Balanced loads
CT connection (3-wire system)
Direct connection (3-wire system)
Fig. 1
Fig. 2
Fig. 3
Fig. 4
Waveform of the signals that can be measured
Figure G
Sine wave, undistorted
Fundamental content
100%
Harmonic content
0%
A
rms
=
1.1107 | A |
Figure H
Sine wave, indented
Fundamental content
10...100%
Harmonic content
0...90%
Frequency spectrum 3rd to 16th harmonic
Required result: additional error < 1%
Figure I
Sine wave, distorted
Fundamental content
70...90%
Harmonic content
10...30%
Frequency spectrum 3rd to 15th harmonic
Required result: additional error < 0.5%
Mode of Operation (cont.)
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