CARLO GAVAZZI WM23-96 - PROGRAMMING User manual

Power Quality Analyzer
Analizzatore di Qualità
della Rete
USER MANUAL
MANUALE ISTRUZIONI
WM23-96
Modular system
Tecnologia modulare
CARLO GAVAZZI
Automation Components

WM23-96: Power Quality Analyzer
Plug and play module system;
Harmonic analysis; Wmax and PFmin
storage. These are only a few among
many other functions performed by
your WM23-96. What’s more, Carlo
Gavazzi means ISO9001 certification,
a working experience of many
decades and a widespread 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 and
evaluate our range of products:
www.carlogavazzi.com
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CARLO GAVAZZI
Automation Components
Plug and Play
Modules

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2Index
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CARLO GAVAZZI
WM23-96, Power Quality Analyzer
FW rev. 01
TO BEGIN WITH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .04
■ Front panel description . . . . . . . . . . . . . . . . . . . .04
■ List and description of displayed measuring pages . . . .04
PROGRAMMING . . . . . . . . . . . . . . . . . . . . . . . . . . . . .07
■ Access to the main menu . . . . . . . . . . . . . . . . . . .07
■ Change password . . . . . . . . . . . . . . . . . . . . . . . .08
■ System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .08
■ CT ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .08
■ VT ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .09
■ Dmd calculation . . . . . . . . . . . . . . . . . . . . . . . . .09
■ Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . .11
■ Total harmonic distortion . . . . . . . . . . . . . . . . . . .11
■ Digital outputs . . . . . . . . . . . . . . . . . . . . . . . . . . .12
❑Digital output 1 . . . . . . . . . . . . . . . . . . . . . . .12
❑Alarm digital output . . . . . . . . . . . . . . . . . . . .12
❑Digital output 2 . . . . . . . . . . . . . . . . . . . . . . .14
■ Analogue output . . . . . . . . . . . . . . . . . . . . . . . . .14
■ Setting of RS422/485 serial comm. port address .16
■ Digital filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
■ End of programming . . . . . . . . . . . . . . . . . . . . . .16
■ Reset of min. values . . . . . . . . . . . . . . . . . . . . . .17
■ Reset of max. values . . . . . . . . . . . . . . . . . . . . . .17
USEFUL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . .18
■ How to prevent key-pad programming . . . . . . . . .18
■ Retransmitted variables . . . . . . . . . . . . . . . . . . . .20
■ Alarm digital output . . . . . . . . . . . . . . . . . . . . . . .21
■ Displaying of programming menu . . . . . . . . . . . . .21
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
■Operations preliminary to the installation . . . . . . .22
Measuring pages description

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Index
Main menu
2
7
■Front panel cut-out . . . . . . . . . . . . . . . . . . . . . . .23
■Module combination . . . . . . . . . . . . . . . . . . . . . .24
■Available modules . . . . . . . . . . . . . . . . . . . . . . . .24
■Digital input connections . . . . . . . . . . . . . . . . . . .27
■Open collector output connections . . . . . . . . . . .28
■RS422/485 port connections . . . . . . . . . . . . . . . .28
■Elettrical connections diagrams . . . . . . . . . . . . . .30
TECHNICAL FEATURES . . . . . . . . . . . . . . . . . . . . . . . .32
We suggest you to keep the original packing in case it is
necessary to return the instrument to our Technical
Service Department. In order to achieve the best results
with your instrument, we recommend you to read this
instruction manual carefully.
HOW TO USE THE SYMBOLS
Go to the page where the previous main sub-
ject is described.
Go to the page where the next main subject is
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 top of the current page ends.
This symbol indicates a particularly important
subject or information.
This symbol indicates that more details are given
on the current subject.
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4To begin with
Measuring pages
6
■Frontal Panel Description
Back-lighted LCD Display.
Display previous page.
Display next page.
Access to programming or
setting confirmation.
■ List and Description of Displayed
Measuring Pages
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kW∑PF∑
kvar∑Hz
VL1-N VL2-N
VL3-N V∑
kW∑PF∑
kVA∑Hz

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To begin with
VT ratio
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Index
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9
6
Display total harmonic dis-
tortion for the single phase
voltages expressed as %.
Display total harmonic dis-
tortion for the single phase
currents expressed as %.
MW∑Max PF∑Min
Max Min
kW dmd
kVA dmd
Serial communication
status: r=Rx; t=Tx
(only with serial comm.
module inserted)
kW dmd, Max
kVA dmd, Max
kVA L1 kVA L2
kVA L3
Max
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6To begin with
Change password
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kvar L1 kvar L2
kvar L3
W L1 Max W L2 Max
W L3 Max Max
W L1 W L2
W L3
PF L1 Min PF L2 Min
PF L3 Min Min
PF L1 PF L2
PF L3 PF ∑
A L1 A L2
A L3 Neutral current
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When the “AL” box (normally used for the alarm
indication) is active during the programming phase,
it means that the displayed value can be modified.
This rule applies to all the programming menus.
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7
Programming
Synchronization
5
Measuring pages
11
17
■Access to the main menu
To access to the programming
menus from the measuring and dis-
play phase, press the key: when
the instrument asks for the pass-
word, enter the correct PASS value
by means of the and keys;
afterwards confirm by means of the
key. If the password is correct
(when the instrument is new, the
password is 0), the instrument goes
to the main functions menu.
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Access to the
main menu
The scrolling of the measuring
pages is cyclic, at the end it returns
back to the first page on the left.
Display of alarm setting (AL1 and
AL2 if both alarms have been set).
Display of the variable connected
to the alarm.
V L1-2 V L2-3
V L3-1 V ∑
Active alarm indicator.
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8Programming
Dmd calculation
3
Index
7
10
17
■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
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■CT ratio
This function allows the user to
select the value of the CT ratio.
Example: if the CT primary (current
transformer) has a current of 300A
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■Change Password
This function allows the operator to
choose the desired password value
(from 0 to 1000).
Choose the “CnG.PASS”function
by means of the and keys,
then press to modify PASS,
enter the desired value by means of
the and keys and confirm
the new value with the key.
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By changing the VT and CT
ratio, the energy meters are
reset.
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Programming
Alarm output
7
Main menu
7
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■VT ratio
This function allows the user to select the
value of the VT ratio. Example: if the pri-
mary of the connected VT (voltage trans-
former) is of 20kV and the secondary is
100V, the VT ratio will correspond to 200
(obtained by carrying out the following
calculation: 20000/100). Choose the
“Vt.rAtio”function by means of the
and keys; to enter the menu press
, then select the desired value by
means of the and keys and
confirm it with . In order to store
the new value, carry out the reset
(rESEt YES  ).
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and the secondary has a current of
5A, the CT ratio corresponds to 60
(obtained by carrying out the fol-
lowing calculation: 300/5). Choose
the “Ct.rAtio”function by means of
the and keys; to enter the
menu press ; then select the
desired value by means of the
and keys and confirm the new
value with . In order to store the
new value, carry out the reset
(rESEt YES
 ).
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10 Programming
Digital outputs
5
Measuring pages
7
12
17
If for example , you select the value “15 minutes”,
the instrument calculates the demand value and
updates the value every 15 minutes. See the dia-
gram below.
■Synchronization
The synchronization allows the instrument, by means of the
digital inputs, to start the integration of the power dmd at
the same time as the official watthour meter. Without digital
input module, the reset and the start of the energy integra-
Where: Pc is the contractual power
t1 is the selected integration period
■Dmd calculation
This function allows the user to
select the integration time of the W,
VA and var demand value (var only
by means of RS485). To enter these
functions select “P.int t”from the
main menu by the and
keys; to enter in the menu press
. Set the desired value by
means of the and keys and
confirm the new value with .
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Programming
Serial port
9
VT ratio
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ule). Every subsequent change of
status, resets and synchronizes
again the calculation of the power
dmd. It is possible to enable or dis-
able the synchronization function
managed by the digital inputs.
Choose the “SYnC”function by
means of the and keys, to
enter the menu press ; Then set
“YES”to enable the function or
“No”to disable the synchronization
by means of the and keys
and confirm with .
■Total Harmonic Distortion
This function allows the user to
enable the FFT analysis (Fast
Fourier Transform) and the display
of the total harmonic distortion (see
also “displayed measuring pages”
on page 5). Choose the “thd”func-
tion 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 .
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tion are carried out as soon as the instrument is switched
off. When the DIGITAL INPUT module is installed, the syn-
chronization starts as soon as one of the digital inputs
changes status (contacts 2 and 3 of the digital input mod-
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12 Programming
Analogue output
7
Main menu
7
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■Digital Outputs
❑Digital Output 1
This function enables
to set the parameters of the dig-
ital outputs. Choose the
“diGout”function by means of
the and keys, to enter
the menu press . Then, set
one of the following parameters:
ALr: access to the alarm func-
tion (see alarm digital output)
confirm with to enter the rel-
evant menu;
rEn: enable the activation of the
output by means of the serial
communication, confirm with
to enable the function.
❑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,
set one of the following parame-
ters:
VAr: choose the variable to be
associated to the alarm activa-
tion by means of the and
keys and confirm with ;
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Alarm digital
output
Digital output 2
on page 14

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Programming
Reset of max and min values
11
Harmonic distortion
7
17
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rnG: select the position of the
digital point;
Set-on: activation set-point,
value of the variable over which
the alarm is activated. Select the
value of the variable by means of
the and keys and con-
firm with ;
Set-oFF: deactivation set-point,
value of the variable over which
the alarm is deactivated. Select
the value of the variable by
means of the and keys
and confirm it with ;
nd: normally de-energized out-
put 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 sec-
onds by means of the and
keys (up to 255 seconds)
and confirm with .
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Digital Output 2
on page 14
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1.2..
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14 Programming
End of programming
9
VT ratio
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❑Digital Output 2
ALr: access to the alarm function
(see alarm digital output on page
12) confirm with to enter the
relevant menu;
rEn: enable the activation of the
output by means of the serial com-
munication, confirm with to
enable the function.
■Analogue output
From the main menu select “AnA
out”by means of the and
keys; to enter the menu press :
VAr: variable to be associated to
the output, choose among those
available (see on page 20) by
means of the and keys
and confirm the selection with
LoE: minimum value of the variable
input range. Select the desired
value by means of the and
keys and confirm it with .
HiE: maximum value of the variable
input range. Select the desired
value by means of the and
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15
Programming
Useful information
13
Alarm output
7
19
17
keys and confirm it with .
LoA: % value of the zero of the
output range (0-20mA, 0-10V) that
is generated by the minimum
measured value (LoE). Select the
desired value by means of the
and keys and confirm it with
.
HiA: % value of the full scale of the
output range (0-20mA, 0-10V) that
is generated by the maximum
measured value (HiE).
Select the desired value by means
of the and keys and con-
firm it with .
See also “Example 1” in useful
information on page 18.
■RS422/485 Serial port
address
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
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16 Programming
Useful information
11
Synchronization
7
18
17
■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
expressed as % of the full scale
value: set the desired value (from 0 to
100%) by means of the and
keys and confirm it with ;
- Coe, to set the filtering coefficient of
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the instantaneous measurements, set the desired value (from 1 to
16) by means of the and keys and confirm it with . By
increasing the value both the stability and the settling time of the
measurements are increased. See also “Example 2”in Useful
Information on page 19.
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■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, con-
firm it with .
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To measur-
ing mode
Instrument
revision
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17
Programming
Up/down alarm
15
Serial port
7
21
■Reset of min values
Select “rESEt MI”from the main
menu by means of the keys,
then confirm with . When the
instrument asks for the reset, choose,
by means of the keys:
“no MI”to avoid the reset or
“YES MI”to confirm it.
Then, press to carry out the com-
mand.
■Reset of max values
Select “rESEt MA”from the main
menu by means of the keys,
then confirm with . When the
instrument asks for the reset, choose,
by means of the keys:
“no MA”to avoid the reset or
“yes MA”to confirm it.
Then, press to carry out the com-
mand.
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RESET
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RESET

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18 Useful Information
What’s ASY
13
Digital outputs
20
21
■How to prevent the programming by key-pad
It is possible to prevent any access to
programming by keypad by modifying the
selector under the power supply slot (see
the drawing on the left), or closing the con-
tact number 1 of the digital input module,
when present.
The variables measured by the instrument are
correct if the polarities of the inputs have been
observed (as shown in the figure below); if not,
measuring and retransmission errors may
occur due to the wrong direction of the current flowing
in the primary / secondary of the connected current
transformer.
■Setting Examples
Example 1 “Analogue output”:take the measure of a
power consumed up to 100kW, and retransmit it with a sig-
nal from 4 to 20 mA; the module to be used is AO1050 or
AO1026 (single or dual output from 0 to 20mA), the instru-
ment must be set as follows:
•VAr: (variable), W∑(system active power)
•LoE: (minimum electrical scale) 0.0 K; the K and M mul-
Selector: turn the selector with a little screwdriver.
- Free programming.
- Lock programming.

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19
Useful Information
Mounting
17
Reset min and max values
18
23
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tiples are automatically selected by the instrument accord-
ing 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
according 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: (max-
imum output value / full scale output value)*100 =
(20mA/20mA)*100 =100%
Example 2 “Use of digital filter”:it’s necessary to stabilize
the displayed value of the VL1-N variable that varies
between 222V and 228V. The parameters of the digital filter
are to be set as follows:
•rnG: the variable varies within the average value, the
amplitude of which is equal to ±1.3% of the 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: if the new value acquired by the instrument is with-
in the filter’s action range, then the new displayed value is
calculated 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: the admitted values are within 1 and 16. Enter the
value in consecutive attempts until you reach the desired
stability.