CARLO GAVAZZI WM22-DIN User manual

WM22-DIN: three-phase power
analyzer
Harmonic analysis; Energy meters;
Plug and play technique. These
are only a few among many other
functions performed by your
WM22-DIN. What’s more,
Carlo Gavazzi means ISO9001
certification, a working experience
of many decades and a wide-
spread presence all over the world.
All this because we want our
customers to have the top service
and the top products.
Welcome in the Carlo Gavazzi
world and compliments for your
smart choice. Visit our website at:
www.carlogavazzi.com
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CARLO GAVAZZI
Automation Components
EN61036
EN61268

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2
Index
3
Front panel
4
CARLO GAVAZZI
WM22 DIN, three-phase power analyzer.
FW rev. 02
TO BEGIN WITH...............................................................04
■Front panel description ...........................................04
■ List and description of displayed measuring pages ..... 04
PROGRAMMING ..............................................................08
■ Access to the main menu........................................08
■ Change password ...................................................08
■ System .................................................................09
■ CT ratio .................................................................09
■ VT ratio .................................................................10
■ Dmd calculation .....................................................10
■ Total harmonic distortion ......................................... 11
■ Digital outputs .........................................................12
❑ Digital output 1..................................................12
❑ Alarm digital output ...........................................13
❑ Digital output 2..................................................14
■ Analogue output ......................................................14
■ Setting of serial communication port address .........15
■ Digital filter ..............................................................16
■ Reset of total meter.................................................16
■ Reset of partial meter..............................................17
■ Reset of max. dmd power values............................17
■ Reset of max current values ...................................18
■ End of programming ...............................................18
■ How to prevent key-pad programming....................18
USEFUL INFORMATION..................................................19
■ Setting examples ....................................................19
■ Table of open collector digital output pulses ..................21
■ The message “Err”on the current page..................21
■ What is ASY? ..........................................................22
■ Digital output for high or low alarm enabling................... 22
■ List of available variables................................................ 23
INSTALLATION ................................................................24

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3
Go to the page where the previous main
subject is described.
Gotothepagewherethenextmainsubjectis
described.
Go to the page where the subject written on
the top of the current page starts.
Go to the page where the subject written on
the bottom of the current page starts.
Thissymbolindicatesaparticularlyimportant
subject or information.
This symbol indicates that more details are
given on the current subject.
Index
HOW TO USE THE SYMBOLS
We suggest you to keep the original packing
in case it is necessary to return the instru-
menttoourTechnicalServiceDepartment.In
order to achieve the best results with your
instrument, we recommend you to read this
instruction manual carefully.
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2
Displayed pages
7
■ How to remove the upper cover..............................24
■ Module connections........................................................ 25
■ Module removal ......................................................26
■ Dimensions and panel cut-out for panel mounting ..... 27
■ Open collector output connections..........................28
■ Analogue output connections..................................28
■ Serial output connections........................................28
■ Electrical diagrams of 90A version..........................29
■ Electrical diagrams of 5A version............................30
TECHNICAL FEATURES .................................................34

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4
To begin with
■ Front panel description
Display
previous page
Display
next page
Access to
programming or
Setting confirmation
Backlighted
LCD display
Instrument
reference number
(optional indication)
■ List and description of the displayed measuring pages
WΣ
VArΣ
PFΣ
Hz
W dmd
VA dmd
Total harmonic distortion ex-
pressed as % for the following
voltages:
V-L3 V-L1 V-L2
These pages are available only if THD is enabled.
7
Displayed pages
6
When the instrument is
switched on, it shows the
measuring page de-
scribed on the left; to dis-
play the other pages,
scroll them by means of
the keys. This
command is cyclic.

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5
Total harmonic distortion
expressed as % for the
following currents:
A-L3 A-L1 A-L2
Total kWh
energy meter.
Total kvarh
energy meter.
Partial kWh
energy meter.
Partial kvarh
energy meter.
To begin with
Index
3
47
System
9

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6
WΣ is always 00 in
case of connections
without neutral.
W-L3
W-L2 W-L1
VΣ is always 00 in
case of connections
without neutral
V-L3
V-L2 V-L1
Err: it’s displayed in
case of wrong connec-
tions in one of the 3
phases. See “Useful in-
formation”on page 21.
A-L3
A-L2 A-L1
To begin with
47
Programming
8
For version 20(90)A only.
Display of max. current values.
For version 5(10)A only.
Display of max. power demand,
values (W, VA).

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7
VAΣ is always 00 in
caseofconnections
without neutral.
VA-L3
VA-L2 VA-L1
VArΣ isalways 00in
case of connections
without neutral.
VAr-L3
VAr-L2 VAr-L1
PFΣ is always 00in
caseofconnections
without neutral.
PF-L3
PF-L2 PF-L1
To begin with
Displayed pages
5
47
Harmonic distortion
11
If displayed in the measuring
mode, it means: the alarm is
ON.
If the serial port module RS422/485 is present, then “r”means
that the instrument is receiving data, while “t”means that the
instrument is transmitting data: this confirms that the serial
module is working correctly and that also the wiring is correct.

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8
■ Access to the main menu
To access to the programming
menusfromthemeasuringanddis-
playphase,pressthe key:when
the instrument asks for the pass-
word,enterthecorrectPASS value
bymeansofthe and keys;
afterwardsconfirmbymeansofthe
key. If the password is correct
(when the instrument is new, the
passwordis0),theinstrumentgoes
to the main functions menu.
■ Change Password
This function allows the operator to
choosethe desiredpassword value
(from 0 to 1000).
Choose the “CnG.PASS”function
by means of the and keys,
thenpress tomodify PASS,en-
ter the desired value by means of
the and keys and confirm
the new value with the key.
Programming
1.2..
..2.1
Access to the
main menu
1.2..
..2.1
Index
3
18
VT ratio
10
When the “AL”box (normally used for the alarm in-
dication) is active during the programming phase, it
meansthatthedisplayedvaluecan bemodified.This
rule applies to all the programming menus.

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Programming
1.2..
..2.1
Displayed pages
7
818
Alarm output
13
■ System
This function allows the operator to
select the electrical system choos-
ing between three-phase with neu-
tral (3P.n) and three-phase without
neutral (3P).
Choose by means of and
the “SySTEn”function, press
to enter the menu; then, select the
desired system by means of the
and keys and confirm with
.
■ CT ratio
This function allows the user to se-
lect the value of the CT ratio. Exam-
ple: if the CT primary (ammeter
transformer) has a current of 300A
and the secondary has a current of
5A, the CT ratio corresponds to 60
(obtained by carrying out the follow-
ing calculation: 300/5).
Choose the “Ct.rAtio”function by
means of the and keys; to
enter the menu press ; then se-
lect the desired value by means of
the and keys and confirm
the new value with .
The energy meters are
reset by changing the CT
ratio.

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■ VT ratio
This function allows the user to se-
lect the value of the VT ratio. Exam-
ple: if the primary of the connected
VT (voltage transformer) is of 20kV
and the secondary is 100V, the VT
ratiowillcorrespondto200(obtained
by carrying out the following calcu-
lation: 20000/100).
Choose the “Vt.rAtio”function by
means of the and keys; to
enter the menu press , then se-
lect the desired value by means of
the and keys and confirm
it with .
By changing the VT ratio,
theenergy meters are re-
set.
■ Dmd calculation
This function allows the user to se-
lectthe integration time of theW,VA
demand value. To enter these func-
tions select “P.int t”from the main
menu by the and keys; to
enter in the menu press . Set
theminutesbymeansofthe and
keys and confirm the new value
with .
1.2..
..2.1
Programming
1.2..
..2.1
Displayed pages
5
818
Digital output 1
12

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■ Total Harmonic Distortion
This function allows the user to en-
able the FFT analysis and the dis-
play of the total harmonic distortion
(see also “displayed measuring
pages”onpage4). Choosethe“tHd”
function by means of the and
keys, to enter the menu press
; then choose if the function is
to be enabled (YES) or disabled
(NO) by means of the and
keys and confirm with .
Programming
If for example, you select the value “15 minutes”,
the instrument calculates the demand value and
updates the value every 15 minutes. See the
diagram below.
SYNCHRONIZATION OF THE POWER DEMAND
CALCULATION
The beginning of the synchronization and as a consequence
the start of the integration time counting are carried out when
the instrument switches on (W dmd and VA dmd).
Where: Pc is the contractual power
t1 is the selected integration period
CT ratio
9
818
Serial address
15

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■ Digital Outputs
❑ Digital Output 1
This function enables to set the pa-
rameters of the open collector dig-
ital outputs. Choose the “diGout”
function by means of the and
keys, to enter the menu press
. Then, you may set the follow-
ing parameters:
ACt EnE: enable theretransmission
of the active energy by means of
pulses, confirm with and then
set the number of pulses (see table
on page 21) by means of the
and keys and confirm the value
with ;
rEA EnE: enable theretransmission
of the reactive energy by means of
pulses, confirm it with and then
set the number of pulses (see table
on page 21) by means of the
and keysand confirm the value
with ;
ALr: access to the alarm function
(see alarm digital output on page
13): confirm with to enter the
relevant menu;
rEn: enables the activation of the
output by means of the serial com-
munication; confirm with to en-
able the function.
1.2..
..2.1
To Digital Output 2
page 14
Alarm param-
eters page 13
Programming
Displayed pages
7
818
Digital Output N 2
14

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13
❑ Alarm Digital Output
This function allows the user to set
the parameters of the alarm digital
output. Choose the “diGout1- ALr ”
function by means of the
keys: to enter the menu press .
Then, you may set the following pa-
rameters:
VAr: choose the variable to be asso-
ciated to the alarm activation by
means of the and keys and
confirm with (see also the table
on page 23);
Set-on: on-alarm set-point, it’s the
value of the variable over which the
alarm is activated. Select the value
of the variable by means of the
and keys and confirm with ;
Set-oFF: off-alarm set-point, it’s the
value of the variable over which the
alarmisdeactivated. Selectthevalue
of the variable by means of the
and keysandconfirm itwith ;
nd: normally de-energized output
when there is no alarm.
nE: normally energized output when
there is no alarm.
Select the output status by means of
the and keys and confirm it
with ;
SEC: delay time at the activation of
the alarm output. Choose the value
of the delay time in seconds by
means of the and keys (up
to255seconds)andconfirm with
.
1.2..
..2.1
1.2..
..2.1
1.2..
..2.1
Programming
Harmonic distortion
11
818
Reset of partial meter
17
To digital output on
page 14.

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❑ Digital output 2
ACtEnE: enablestheretransmission
of the active energy by means of
pulses; confirm with and after-
wardsset thenumberof pulses (see
table on page 21) by means of the
and keys and confirm the
value with ;
rEA EnE: enable theretransmission
by means of pulses of the reactive
energy, confirm it with and then
set the number of pulses (see table
on page 21) by means of the
and keys and confirm the value
with .
Programming
From digital output 1,
rEn,PuL,SEC page 12
1.2..
..2.1
1.2..
..2.1
Power dmd
11
818
Digital filter
16
■ Analogue output
From the main menu select “AnA
out”by means of the and
keys; to enter the menu press :
VAr:variabletobeassociatedtothe
output, choose among those avail-
able (see on page 23) by means of
the and keys and confirm
the selection with .
LoE: minimum value of the variable
inputrange.Selectthedesiredvalue
by means of the and keys
and confirm it with .
HiE: maximumvalueofthe variable

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15
■ RS422/485Serialportaddress
Select “AddrESS”from the main
menu by means of the and
keys; to enter the menu press ,
then set the desired address value
(from 1 to 255) by means of the
and keys and confirm it with
.
inputrange.Selectthedesiredvalue
by means of the and keys
and confirm it with .
LoA: % value of the zero of the
outputrange(0-20mA,0-10V)thatis
generated by the minimum meas-
uredvalue (LoE). Selectthe desired
value by means of the and
keys and confirm it with .
HiA: % value of the full scale of the
outputrange(0-20mA,0-10V)thatis
generated by the maximum meas-
ured value (HiE).
Selectthedesiredvaluebymeansof
the and keysandconfirm it
with . See also “Example 1” in
useful information on page 19.
Programming
1.2..
..2.1
1.2..
..2.1
1.2..
..2.1
1.2..
..2.1
Alarm
13
818
Useful information
19

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■ Reset of Total meters
Select “rESEt tot”from the main
menubymeansofthe and
keys, confirm with : when the
instrument asks for the reset, you
can choose, by means of the
and keys:
- “no tot”to avoid the reset or
- “YES tot”to confirm it.
Then, press to carry out the
command.
■ Digital Filter
Select “FiLtEr”by means of the
and keys: to enter the menu
press . Select the parameters to
be set with the and keys, to
enter the menu press .
There are two parameters:
- rnG, to set the operating range of
the digital filter. The value is ex-
pressed as % of the full scale value:
setthedesiredvalue(from0to100%)
bymeans ofthe and keys
and confirm it with ;
- CoE, to set the filtering coefficient of the instantaneous
measurements,set the desiredvalue(from 1 to16) by means
ofthe and keysandconfirmitwith .Byincreasing
the value both the stability and the settling time of the meas-
urements are increased. See also “Example 2” in Useful
Information on page 20.
Programming
1.2..
..2.1
1.2..
..2.1
Programming
8
818
End of programming
18
RESET

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■ Only in the 5(10)A version
Reset of the maximum values
of the dmd powers
Select “rESEt dmd”from the main
menu by means of the and
keys, confirm with ; when the
instrument asks for the reset, you
can choose, by means of the
and keys:
- “no dmd”to avoid the reset or
- “YES dmd”to confirm it;
Then, press to carry out the
command.
■ Reset of partial meters
Select “rESEt Prt”from the main
menu by means of the and
keys, confirm with ; when the
instrument asks for the reset, you
can choose, by means of the
and keys:
- “no Prt”to avoid the reset or
- “YES Prt”to confirm it;
Then, press to carry out the
command.
RESET
Programming
Serial address
15
8
21
What is Asy
RESET
18

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18
■ Onlyintheversion20(90)A.
Resetofthemaximumcurrent
values
Select “rESEt m”from the main
menu by means of the and
keys, confirm it with ; when the
instrument asks for the reset, you
can choose, by means of the
and keys:
- “no m”to avoid the reset or “YES
m”to confirm it
Then, press to carry out the
command.
■ How to prevent the pro-
gramming by key-pad
It’s possible to prevent access to
programming by modifying the dip-
switchunder slot B. Set dip-switch 1
in position ON to inhibit program-
ming; Set dip-switch 1 in position
OFF to enable programming again.
■ End of programming
Use it to exit from programming and
go back to the measuring mode.
Select“End”from the main menu by
means of the and keys,
confirm it with .
Measuring
mode
Instrument’s
revision
Slot B
on
1 2
on
FREE Access
Access DENIED
RESET
Programming
Alarm
13
8
Example 2
20

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19
Useful information
Reset of the meters
17
23
List of the variables
23
Thevariablesmeasuredbytheinstrumentare
correct if the polarities of the inputs have
been observed (as shown in the figure be-
low); if not, measuring and retransmission
errors may occur due to the wrong direction
ofthecurrentflowinginthe primary/second-
ary of the connected current transformer.
■ Setting Examples
Example1“Analogueoutput”:takethemeasureofapower
consumedup to100kW,and retransmit itwith a signalfrom 4
to20mA;themoduletobeusedisAO2920(from0to20mA),
the instrument must be set as follows:
•VAr: (variable), WΣ (system active power)
•LoE:(minimumelectricalscale)0.0K;theKandMmultiples
are automatically selected by the instrument according to
the selected VT and CT values;
•HiE: (maximum electrical scale) 100.0 K; the K and M
multiples are automatically selected by the instrument ac-
cording to the selected VT and CT values;
•LoA: (minimum electrical scale of the analogue output)
20.0% for 4mA, the calculation to be carried out is: (mini-
mum output value/ full scale output value)*100 = (4mA/
20mA)*100 = 20%
•HiA: (maximum electrical scale of the analogue output)
100.0% for 20mA, the calculation to be carried out is:
(maximum output value / full scale output value)*100 =
(20mA/20mA)*100 =100%

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20
■ CT and VT programming; Open collector Pulse
Digital Output Table
The CT is programmable from 1 to 5000, the VT is program-
mable from 1.0 to 199.9 and from 200 to 1999 (CT*VT ratio
limited to 5000). The CT must be programmed before the VT
because the programming of VT depends on the CT value: if
theCTismodified,thentheVTvaluecanautomaticallysatisfy
the expression: CT*VT≤5000. If the CT or VT values are
modified,thenthedisplayresolutionofthevariablesandofthe
“pul”(pulses) parameter changes automatically according to
the table on the following page.
When the CT or VT value is modified, then the energy meters
Useful information
Serial address
19
23
What is Asy
22
19
Example 2 “Use of digital filter”: it’s necessary to stabilize
the displayed value of the VL1-N variable that varies between
222Vand228V.Theparametersofthedigitalfilteraretobeset
as follows:
•rnG: thevariable varies withinthe average value,the ampli-
tude ofwhich isequal to ±1.3%ofthe variable’s rated value,
calculated as follows:
(228-222)/2= ± 3V , then ± 3*100/231V =±1.3% where 231V is
the phase-neutral rated value of a 400V input range). The
“range”parameter, that corresponds to the action range of
the digital filter, is set at a value which is slightly higher than
the percentage amplitude of the fluctuation: e.g. 2%.
•CoE:ifthenewvalueacquiredbytheinstrument iswithinthe
filter’s action range, then the new displayed value is calcu-
lated by summing algebraically to the previous value the
variation divided by the filtering coefficient. As a conse-
quence, a value which is higher than this coefficient implies
a longer settling time and therefore improves the stability.
The latter can also be improved by increasing the filtering
coefficient:theadmittedvaluesarewithin1and16.Enterthe
value in consecutive attempts until you reach the desired
stability.