Energy Management

Three-phase power analyzer with output modules

Type WM22-DIN
• Class 0.5 (current/voltage)
• Three-phase power analyzer
• Back-lighted LCD
• 4 x 31/2 DGT instantaneous variables read out
• 71/2 DGT energy read-out
• Measurements of system and phase variables:
W, Wdmd, var, VA, VAdmd, PF (cosϕ), V, A, Hz, THD-A, THD-V
• Measurements of total energies: kWh, kvarh
• Measurements of partial energies: kWh, kvarh
• Energy measurements according to EN61036 and EN61268
• TRMS measurements of distorted wave forms
(voltages/currents)
• Two basic models: direct connection 20(90)AAC,
CT 5(10)AAC and VT connection

• Front dimensions: 9 DIN modules • Control of phase asymmetry

• Analogue output by means of optional module • Maximum value indication of W dmd and VA dmd (only
(20mA or 10VDC) 5A version); maximum value indication of A (only 90A
• RS 422/485 Serial port by means of optional module version)
• Alarm output by means of optional module • Self power supply (available for some models only) or
• Dual pulse output by means of optional module auxiliary power supply: 24V, 48V, 115V, 230V, 50-60Hz
• Degree of protection (front): IP 40

Product description How to order WM22-DIN AV5 3 X X XX

Three-phase power analyzer tion area from 6 to 35 mm2. Model
with built-in configuration The special design of the Range code
key-pad; instrument’s housing allows System
Particularly indicated for the to add at any time the inter- Power supply
analysis of main, secondary face modules, even when Slot A
and energy metering electri- the instrument is already Slot B
cal variables. installed.
Housing for DIN-rail or wall- The following modules are
mounting, IP40 (front) pro- available:
tection degree. - for all versions: pulses out-
Completely sealable housing. put;
In case of direct connection - only for the versions with
up to 90A, the measuring auxiliary power supply:
input terminals are suitable analogue output, RS485
for cables with a cross-sec- port or alarm output.

Type selection
Range Code Power supply Slot A (retransmission) Slot B (retransmission)

Auxiliary Power Supply: For all versions X: None Only with A-B-C-D power supply
AV0: 208VL-L/20(90)AAC [1] A: 24VAC O: AO2900 module XX: None
AV1: 400VL-L/20(90)AAC [1] -15+10%, 50-60Hz Dual open collector A1: AO2920 module
AV3: 660VL-L/20(90)AAC [2] B: 48VAC output 0-20mADC
AV4: 208VL-L/5(10)AAC [1] -15+10%, 50-60Hz Three operating modes: analogue output
AV5: 400VL-L/5(10)AAC [1] C: 115VAC • two pulse outputs V1: AO2921 module
AV6: 100VL-L/5(10)AAC [3] -15+10%, 50-60Hz (kWh and kvarh); 0-10VDC
AV7: 660VL-L/5(10)AAC [2] D: 230VAC • one alarm output analogue output
Self Power Supply: -15+10%, 50-60Hz and one pulse S0: AR2950 module
AV8: 208VL-L/20(90)AAC [1] Only for AV0 and AV1 versions output (kWh or kvarh) RS422/485
AV9: 400VL-L/20(90)AAC [1] X: Self Power Supply • one output which is serial port
400VL-L remotely controlled
System by a serial port
-20+15%, 50-60Hz
and one pulse
208VL-L
3: Three-phase, balan- output (kWh or kvarh)
-20+15%, 50-60Hz
ced and unbalanced
load with or without
neutral
[1] Un: -20+15% [2] Un: -30+15% [3] Un: -20+20%
Specifications are subject to change without notice 1
WM22-DIN

Input specifications
Number of inputs Additional errors Acc. to EN61036, EN61268
Current 3 Wave form <1% (3rd harmonic: 10%)
Voltage 4 Voltage asymmetry < 0.5% (referred to Un)
Accuracy (display, RS485) Ib: 5A, Imax: 10A Magnetic induction 0 (up to 0.5 mT)
Ib: 20A, Imax:90A HF Electromagnetic fields < 1%
Un: see previous page Operation of accessories 0
“Range code” Temperature drift ≤ 200ppm/°C
Current from 0.003Ib to 0.2Ib: Sampling rate 1000 samplings/s @ 50Hz
±(0.5%RDG +3DGT)
from 0.2Ib to Imax: Display
±(0.5%RDG +1DGT) Type Back-lighted LCD
Voltage in the range Un: Instantan. variables read-out 4x31/2 DGT
±(0,5% RDG + 1DGT) Energies Total:1x71/2 DGT
Frequency ±0.1% RDG (50 to 60 Hz) Partial: 1x71/2 DGT
Active power Max. and Min. indication Max. 1999 (19999999), Min. 0
(@ 25°C ± 5°C, R.H. ≤ 90%) ±1% RDG ±1DGT (PF 1, Measurements Current, voltage, power,
0.1Ib to Imax, in the Un range; energy, power factor, frequen-
PF 0.5L, PF 0.8C, 0.2Ib to cy, harmonic distortion (see
Imax, in the Un range) display specs). TRMS
Reactive power measurements of distorted
(@ 25°C ± 5°C, R.H. ≤ 90%) ±2% RDG ±1DGT (sinϕ 1, wave forms.
0.05Ib to Imax, in the Un range; Coupling type Direct
sinϕ 0.5L, sinϕ 0.5C, Crest factor
0.1Ib to Imax, in the Un range)
Apparent power Ib 5A ≤3 (15A max. peak)
(@ 25°C ± 5°C, R.H. ≤ 90%) ±1% RDG ±1DGT (PF 1, Ib 20A ≤6 (127A max. peak)
0.1Ib to Imax, in the Un range) Current overload
Energies 5(10) A, for 10ms 300 A max, @ 50Hz
(@ 25°C ± 5°C, R.H. ≤ 90%) Class 1 acc. to EN61036 5(10) A, for 500ms 200 A max, @ 50Hz
Class 2 acc. to EN61268 5(10) A, permanent 10A, @ 50Hz
Ib: 5A, Imax: 10A 20(90) A, for 10ms 2700A max, @ 50Hz
0.1Ib: 500mA, 20(90) A, permanent 90A, @ 50Hz
Start up corrent: 20mA
Un: see table “range code” Voltage overload
Ib: 20A, Imax: 90A Permanent 1.2 Un
0.1Ib: 2A, For 1s 2 Un
Start up current: 80mA Input impedance
Un: see table “range code” 400VL-L (AV1-AV5-AV9) > 720KΩ
Harmonic distortion ±3% f.s. (f.s.: 100%) 208VL-L (AV0-AV4-AV8) > 720KΩ
(@ 25°C ± 5°C, R.H. ≤ 90%) up to the 7th harmonic; 660VL-L (AV3-AV7) > 1.97MΩ
Un: see table “range code” 100VL-L (AV6) > 400KΩ
Ib 5A Imin: 500mA; 5(10) A (AV4-AV5-AV6-AV7) < 0.3VA
Imax: 15Ap; 20(90) A (AV0-AV1-AV3-AV8-AV9) < 4VA
Ib 20A Imin: 2A;
Frequency 50 to 60 Hz
Imax: 127Ap;

Interface module specifications

Analogue outputs (on request) the following ranges:
Number of outputs 1 0 and 20mADC, 0 and 10VDC
Range 0 to 20 mADC Response time
(AO2920 module slot B, System variables V, W, VA, var, PF (cosϕ)
only for versions with FFT off, filter off 900ms
auxiliary power supply) FFT on, filter on 1.4s
0 to 10VDC variables THD-V, THD-A
(AO2921 module slot B, Filter off 3s
only for versions with Ripple ≤ 1% according to IEC 60688-1,
auxiliary power supply) EN 60688-1
Accuracy ±0.5% F.S. Load
Temperature drift ≤ 300 ppm/ °C 20 mADC ≤ 500 Ω
Scaling factor Programmable within the 10 VDC ≥ 10 kΩ
whole range of Insulation By means of optocouplers,
retransmission; 2000 VRMS between output
it allows the retransmission and measuring input
of all the values included in

2 Specifications are subject to change without notice

WM22-DIN

Interface module specifications (cont.)

2000 VRMS between output According to DIN43864
and power supply input Insulation By means of optocouplers,
RS422/RS485 (on request) AR2950 module 2000 VRMS outputs to
Type Multidrop measuring inputs,
bidirectional (static and 2000 VRMS output to
and dynamic variables) supply input.
Connections 2 or 4 wires, max. distance Insulation between the two
1200m, termination directly outputs: functional
on the module Alarm output
Addresses 255, selectable by key-pad Number of outputs 1
Protocol MODBUS/JBUS Alarm type Up alarm, down alarm
Data (bidirectional) phase asymmetry, phase
Dynamic (reading only) Phase and system variables: loss.
see table “Display pages” Setpoint adjustment 0 to 100% of the electrical
Static (writing only ) All the programming data, scale
reset of energy, activation of Hysteresis 0 to 100% of the electrical
static output. scale
Stored energy (EEPROM) On-time delay 0 to 255 seconds
max. 19.999.999 kWh/kvarh Response time
Data format 1 start bit, 8 data bit, system variables V, W, VA, var, PF (cosϕ)
no parity, 1 stop bit FFT off, filter off 700ms
Baud-rate 9600 bit/s FFT on, filter on 1.2s
Insulation By means of optocouplers, variables THD-V, THD-A
2000 VRMS output Filter off 3s
to measuring inputs Output type Open collector (transistor NPN)
2000 VRMS output to VON 1.2 VDC / max. 100 mA
supply input VOFF 30 VDC max.
Digital outputs (on request) AO2900 module Insulation By means of optocouplers,
To be used as alarm, energy 2000 VRMS output to
retransmission, or remote measuring input,
static outputs. 2000 VRMS output to
Three working modes are supply input.
selectable: Insulation between the two
• two pulse outputs outputs: functional
(kWh and kvarh);
• one alarm output and
one pulse output
(kWh or kvarh)
• one output remotely con-
trolled by means of the
serial port and one pulse
output (kWh or kvarh)
Pulse outputs
Number of outputs 2
Number of pulses From 0.01 to 100 pulses
programmable according
to the selected CT and VT
ratios
Output type Open collector (transistor NPN)
VON 1.2 VDC / max. 100 mA
VOFF 30 VDC max.
Pulse duration 220 ms (ON), ≥ 220 ms (OFF)

Specifications are subject to change without notice 3

WM22-DIN

Software functions
Password Numeric code of max. Electrical range Programmable within the
3 digits whole measuring range.
2 protection levels of the Filter
programming data Filter operating range 0 to 99.9% of the input
1st level Password “0”, no protection electrical scale.
2nd level Password from 1 to 1000, Filter coefficient 1 to 16
all data are protected Filter action Alarm, analogue and serial
System selection Three-phase with neutral output (fundamental
Three-phase without neutral variables: V, A, W and their
derived ones).
Transformer ratio
CT 1 to 5000 Display Up to 4 variables per page
VT 1.0 to 199.9 and 200 to 1999 System variables Page 1: W-var-PF (cosϕ)
Note: Page 2: W dmd - VA dmd - Hz
The CT ratio* VT ratio must Single phase variables Page 3: THD-V
never exceed the value Page 4: THD-A
5000. The current System variables Page 5: kWh total
measuring inputs can Page 6: kvarh total
manage CT’s with a Page 7: kWh partial
secondary of 1A and 5A Page 8: kvarh partial
(the accuracy always refer Single phase variables Page 9: VL-N
to 5A) Page 10: A
20(90) A Page 11a: A MAX
Scaling factor 5(10) A Page 11b: W dmd MAX VA dmd MAX
Operating mode Compression/expansion of Page 12: W
the measuring range to be Page 13: VA
connected to the analogue Page 14: var
output. Page 15: PF (cosϕ)

Supply specifications
Self supplied version 400VL-L 115VAC
-20% +15%, 50-60Hz -15 +10%, 50-60Hz
208VL-L 48VAC
-20% +15% , 50-60Hz -15 +10%, 50-60Hz
Auxiliary power supply 230VAC 24VAC
-15 +10%, 50-60Hz -15 +10%, 50-60Hz
Energy consumption ≤ 7VA

General Specifications
Operating 0 to +55°C Pulse voltage (1.2/50µs) 8kV (EN61000-4-5)
temperature (R.H. < 90% non-condensing Standards
40°C) Safety IEC664-1
Storage -20 to +60°C Metrology Energy measurements:
temperature (R.H. < 90% non-condensing EN61036, EN61268.
40°C) Pulse output DIN43864
Installation category Cat. III (IEC 664) Approvals CE
Insulation 2000 VRMS between all inputs / Connections 5(10) A Screw-type,
outputs to earth Cable cross-section area 4 mm2
Dielectric strength 4000 VRMS for 1 minute Connections 20(90) A Screw-type,
Noise rejection Min./Max. cable cross-section area 6 mm2 / 35 mm2
CMRR 100 dB, 48 to 62 Hz Min./Max. screws tightening torque 2 Nm / 6 Nm
EMC Housing
Dimensions 162.5 x 90 x 63 mm
Burst 4kV/level 4 (EN61000-4-4) Material ABS, NORYL, PC
Immunity to irradiated self-extinguishing: UL 94 V-0
electromagnetic fields 10V/m 26-1000MHz Mounting DIN-rail and wall
(EN61000-4-3)
Electrostatic discharges 15kV (EN61000-4-2) Degree of protection Front: IP40
Radio frequency emissions according to CISPR 14 Connections: IP20
and CISPR 22 Weight 800 g approx.
(packing included)
4 Specifications are subject to change without notice
WM22-DIN

Function description
Input and output scaling capability
Working examples of the analogue output (Y) versus the input variable (x) - (input/output scaling possibilities).
Figure A Figure B
The sign of measured quantity The sign of measured quantity
and output quantity remains and output quantity remains
the same. The output quantity the same. With the measured
is proportional to the mea- quantity being zero, the output
sured quantity. quantity already has the value
Y1 = 0.2 Y2.
Live zero output.

0 50 A 100 A
0 50 A 100 A
4 12 mA 20 mA
0 10 mA 20 mA

Figure C
The sign of measured quantity
and output quantity remains
the same. On the range
X0...X1, the output quantity is
zero. The range X1...X2 is deli-
neated on the entire output
range Y0=Y1...Y2 and thus
presented in strongly expan-
ded form.
80 V 100 V 120 V

0 5 mA 10 mA

Mode of Operation
Waveform of the signals that can be measured

Figure D Figure E Figure F

Sine wave, undistorted Sine wave, indented Sine wave, distorted
Fundamental content 100% Fundamental content 10...100% Fundamental content 70...90%
Harmonic content 0% Harmonic contents 0...90% Harmonic content 10...30%
Arms = 1.1107 | A | Frequency spectrum: 3rd to the 16th harmonic Frequency spectrum: 3rd to the 16th harmonic
Additional error: <1% rdg Additional error: <0.5% rdg

Specifications are subject to change without notice 5

WM22-DIN

Harmonic distortion analysis

Anaysis principle FFT THD (AL2), THD (AL3)
Harmonic measurement Read-out THD %
Current Up to the 7th harmonic System The harmonic distortion
Voltage Up to the 7th harmonic can be measured in 3-wire
Type of harmonics THD (VL1), THD (VL2), or 4-wire systems.
THD (VL3), THD (AL1)

Display pages
Variables that can be displayed
No 1st variable 2nd variable 3rd variable 4th variable Notes
1 W sys PF sys VAr sys sys = system
2 W dmd Hz VA dmd dmd = demand
(integration time from 1 to 30 minutes)
3 VL1 THD VL2 THD VL3 THD THD = tot. harmonic distortion
4 AL1 THD AL2 THD AL3 THD THD = tot. harmonic distortion
5 kWh total energy
6 kVArh total energy
7 kWh partial energy
8 kVArh partial energy
9 VL1 VL2 VL-3 VL-L sys sys = system
10 AL1 AL2 AL3 Err Err = in case of negative power
11a W dmd MAX VA dmd MAX Only version 1-5A, dmd = demand
11b AL1 MAX AL2 MAX AL3 MAX Only version 90A
12 WL1 WL2 WL3 W sys sys = system
13 VAL1 VAL2 VAL3 VA sys The system value remains always 0
14 VArL1 VArL2 VArL3 VAr sys if the neutral is not connected
15 PFL1 PFL2 PFL3 PF sys

Used calculation formulas

Phase variables System variables Note:

i = phase (L1, L2 or L3)
Instantaneous effective voltage Equivalent system voltage T = variable (V or I)
n = harmonic order

Instantaneous active power System reactive power Consumption recording

Instantaneous power factor System active power

Instantaneous effective current System apparent power

Note:
i = phase (L1, L2 or L3)
Instantaneous apparent power System power factor P = active power
(TPF) Q = reactive power
t1, t2 = starting and ending time
Instantaneous reactive power Total harmonic distortion points of consumption recording
n = time unit
∆t = time interval of consumption recording
n1, n2 = starting and ending discrete time
points of consumption recording

6 Specifications are subject to change without notice

 WM22-DIN

Available models
Type Inputs Power supply Ordering code
WM22-DIN AV9.3.X. 400VL-L, 20(90)A Self power supply AF2100
WM22-DIN AV8.3.X. 208VL-L, 20(90)A Self power-supply AF2101
WM22-DIN AV1.3.D. 400VL-L, 20(90)A 230VAC, 50-60Hz AF2102
WM22-DIN AV0.3.D. 208VL-L, 20(90)A 230VAC, 50-60Hz AF2103
WM22-DIN AV3.3.D. 660VL-L, 20(90)A 230VAC, 50-60Hz AF2104
WM22-DIN AV1.3.C. 400VL-L, 20(90)A 115VAC, 50-60Hz AF2105
WM22-DIN AV0.3.C. 208VL-L, 20(90)A 115AC, 50-60Hz AF2106
WM22-DIN AV3.3.C. 660VL-L, 20(90)A 115VAC, 50-60Hz AF2107
WM22-DIN AV1.3.B. 400VL-L, 20(90)A 48VAC, 50-60Hz AF2108
WM22-DIN AV0.3.B. 208VL-L, 20(90)A 48VAC, 50-60Hz AF2109
WM22-DIN AV3.3.B. 660VL-L, 20(90)A 48VAC, 50-60Hz AF2110
WM22-DIN AV1.3.A. 400VL-L, 20(90)A 24VAC, 50-60Hz AF2111
WM22-DIN AV0.3.A. 208VL-L, 20(90)A 24VAC, 50-60Hz AF2112
WM22-DIN AV3.3.A. 660VL-L, 20(90)A 24VAC, 50-60Hz AF2113
WM22-DIN AV5.3.D. 400VL-L, 5(10)A 230VAC, 50-60Hz AF2114
WM22-DIN AV4.3.D. 208VL-L, 5(10)A 230VAC, 50-60Hz AF2115
WM22-DIN AV7.3.D. 660VL-L, 5(10)A 230VAC, 50-60Hz AF2116
WM22-DIN AV5.3.C. 400VL-L, 5(10)A 115VAC, 50-60Hz AF2117
WM22-DIN AV4.3.C. 208VL-L, 5(10)A 115VAC, 50-60Hz AF2118
WM22-DIN AV7.3.C. 660VL-L, 5(10)A 115VAC, 50-60Hz AF2119
WM22-DIN AV5.3.B. 400VL-L, 5(10)A 48VAC, 50-60Hz AF2120
WM22-DIN AV4.3.B. 208VL-L, 5(10)A 48VAC, 50-60Hz AF2121
WM22-DIN AV7.3.B. 660VL-L, 5(10)A 48VAC, 50-60Hz AF2122
WM22-DIN AV5.3.A. 400VL-L, 5(10)A 24VAC, 50-60Hz AF2123
WM22-DIN AV4.3.A. 208VL-L, 5(10)A 24VAC, 50-60Hz AF2124
WM22-DIN AV7.3.A. 660VL-L, 5(10)A 24VAC, 50-60Hz AF2125
WM22-DIN AV6.3.D. 100VL-L, 5(10)A 230VAC, 50-60Hz AF2126
WM22-DIN AV6.3.C. 100VL-L, 5(10)A 115VAC, 50-60Hz AF2127
WM22-DIN AV6.3.B. 100VL-L, 5(10)A 48VAC, 50-60Hz AF2128
WM22-DIN AV6.3.A. 100VL-L, 5(10)A 24VAC, 50-60Hz AF2129
Available modules
Type Channels Code Type Channels Code
Open collector output 2 AO2900 0-10VDC Analogue Output 1 AO2921
0-20mADC analogue output 1 AO2920 RS485 Serial Output 1 AR2950

Possible module combinations

Power supply Self p.s. Auxiliary p.s. Power supply Self p.s. Auxiliary p.s.
Basic unit Slot A Slot B Slot A Slot B Basic unit Slot A Slot B Slot A Slot B
Open collector output Analogue output
RS485 Serial Output

List of the of the variables that can be connected to the analogue and alarm output
N° Variable Notes N° Variable Notes
1 V sys sys = system 6 THD-V Max. THD value among the three phases
2 W sys sys = system 7 THD-A Max. THD value among the three phases
3 var sys sys = system 8 VA dmd Power demand in the selected
4 VA sys sys = system 9 W dmd integration time
5 PF sys sys = system 10 ASY Phase asymmetry

Specifications are subject to change without notice 7

 WM22-DIN

Wiring diagrams

20(90)A model: three-phase unbalanced load

Auxiliary power supply Fig. 1 Auxiliary power supply Fig. 2 Self-power supply Fig. 3
AC power supply AC power supply

LOAD

LOAD
LOAD

Direct connection (3-wire system) Direct connection (3-wire system) Direct connection (3-wire system)

20(90)A model: 5(10)A model:

three-phase unbalanced load three-phase unbalanced load
Self-power supply Fig. 4 Auxiliary power supply Fig. 5 Auxiliary power supply Fig. 6
AC power supply AC power supply
LOAD

LOAD

LOAD
Direct connection (3-phase system
Direct connection (3-phase system + N) with or without neutral) CT connection (3-wire system)

5(10)A model: three-phase unbalanced load

Auxiliary power supply Fig. 7 Auxiliary power supply Fig. 8 Auxiliary power supply Fig. 9
AC power supply AC power supply AC power supply
LOAD

LOAD

LOAD

CT and VT ARON connection (3-phase system) CT ARON connection (3-phase system) VT and CT connection (3-phase system)

8 Specifications are subject to change without notice

WM22-DIN

Wiring diagrams (optional modules)

Open collector output Fig.10 The grounds of the outputs are sepa-
VDC max 30V
rated, and therefore it’s possible to car-
ry out, for the same module, two differ-
ent connections. The load resistance
(Rc) must be designed so that the
closed contact current is lower than
100mA; the VDC voltage must be low-
er than or equal to 30V.
VDC: power supply voltage output.
Vo+: positive output contact (open col-
lector transistor).
GND: ground output contact (open
collector transistor).

Analogue output Fig. 11 RS485 Serial output Fig. 12 RS485 Serial output Fig. 13

Current and voltage 4-wire connection 2-wire connection

Front panel description

4 Keys for:
- value programming;
3 - function selection;
2 - displaying the measuring pages.

1 2. Display
LCD with alphanumeric indications to:
- display configuration parameters;
- display all the measured variables.

3. Removable label
Label to write the instrument ID number.
1. Key-pad
To program configuration parameters and to display variables. 4. Hidden dip-switch
Enable/ disable the access to the
programming procedure.
S-key to enter programming and confirm selections;

Specifications are subject to change without notice 9

WM22-DIN

Dimensions and panel cut-out

Terminal boards

Analogue output module Dual output RS485

open collector module serial output module

AO 2920: 0-20 mA AO 2900 AR 2950

AO 2921: 0-10 mA

10 Specifications are subject to change without notice