Circutor CVMk Series User manual

SUPPLY NETWORK ANALYZER
CVMk SERIES
&
CVMk-4C SERIES
INSTRUCTION MANUAL
( M98117101-03 / 03B - Manual )
(c) CIRCUTOR S.A.

----- Supply network analyzer CVMk and CVMk-ITF ------ Page Nº 1
CVMkSUPPLY NETWORK ANALYZER
page
1. BASIC INSTRUCTIONS....................................................................................................3
1.1. Delivery spot check.....................................................................................................3
1.2. Connection procedures...............................................................................................3
2. MAIN CHARACTERISTICS...............................................................................................4
2.1. Other Characteristics ..................................................................................................6
3. INSTALLATION AND STARTUP.......................................................................................7
3.1. INSTALLATION...........................................................................................................7
3.2. Connection terminal ..................................................................................................10
3.3. Connection drawing for the Standard CVMk (12 terminal model - NON ITF) ...........11
3.4. Connection drawing for the CVMk - ITF ( 13 terminal model - ITF ) ........................12
4. OPERATION MODE........................................................................................................16
5. SETUP.............................................................................................................................18
5.1. Phase-Phase or Phase-Neutral voltages..................................................................18
5.2. Voltage Transformer Primary....................................................................................19
5.3. Voltage Transformer Secondary ...............................................................................20
5.4. Current Transformer Primary ....................................................................................20
5.5. Parameter SETUP.....................................................................................................21
5.6. First Page SETUP.....................................................................................................23
5.7. Maximum power demand..........................................................................................24
5.8. DATE / TIME SETUP................................................................................................25
5.9. Clearing energy counters..........................................................................................26
6. SPECIFICATIONS...........................................................................................................27
7. SAFETY CONSIDERATIONS .........................................................................................28
8. MAINTENANCE...............................................................................................................28

----- Supply network analyzer CVMk and CVMk-ITF ------ Page Nº 2
9. TECHNICAL SERVICE....................................................................................................29
10. MODULES :..................................................................................................................30
10.1. Relay modules: CVM-ERC-1 (1 relay ), CVM-ERC-2 ( 2 relays ),.........................31
10.2. ADDITIONAL SCREEN WITH THE 4 - 20 mA OUTPUT MODULES....................36
11. CVMk COMMUNICATIONS .........................................................................................40
11.1. DEMAND FORMAT ...............................................................................................40
11.2. COMMANDS..........................................................................................................41
11.2.1. COMMANDS FOR THE PARAMETER READING.............................................41
11.2.2. PROGRAMMING COMMANDS .........................................................................42
11.2.3. CVMk-... COMMANDS WITH THE ENERGY + CLOCK MODULE....................43
11.2.4. MAXIMUM POWER DEMAND COMMANDS.....................................................44
11.2.5. COMMAND to read all the CVMk parameters....................................................44
11.2.6. COMMANDSFOR THE CONFIGURATION OF THE RELAY MODULES..........45
11.2.7. COMMANDS FOR THE CONFIGURATION OF THE 4 - 20 mA MODULES.....45
11.3. EXAMPLES............................................................................................................46
11.4. DEFAULT CVMk CONFIGURATION : 00 / 9.600 / 7 bits / N / 1 bit.......................47
12. APPENDIX ...................................................................................................................49
12.1. APPENDIX A: FOUR QUADRANTS OF THE CVMk-4C-.....................................49
12.2. APPENDIX B: Second SET-UP of the CVMk .......................................................50
12.3. APPENDIX C : CVM-RED-C2 module ( Communications + 2 staticn outputs ) ....52
12.4. APPENDIX D : CVM-RED-420 module .................................................................53
12.5. APPENDIX E : CVM-RED-MAX module...............................................................54
12.6. APPENDIX F : MODBUS © protocol ....................................................................58

----- Supply network analyzer CVMk and CVMk-ITF ------ Page Nº 3
1. BASIC INSTRUCTIONS
1.1. Delivery spot check
This manual is issued to help all the CVMk users to install and use it in order get the
best from it. After receiving the unit please check the following points:
(a) Does this device corresponds to your order specifications?
(b) Check if any damage was done during the shipment process.
(c) Verify that it includes the following standard accessories:
*One connections terminal, *One instruction manual and *One set of labels
1.2. Connection procedures
Before connecting the instrument to the mains verify the following:
(a) Power supply : see rear part of your CVMk
a.1.- CVMk .... : Power supply Va.c. ( Single phase )
Frequency: 50 ... 60 Hz
Rated voltage:
230 V a.c. or 400 V a.c.
240 V a.c. or 480 V a.c.
110 V a.c.
a.2.- CVMk... / SDC : Power supply Vd.c. (Only available LCD display version)
Rated voltage:
24 V d.c. ( 20 V d.c. ....... 60 V d.c. )
110 V d.c. ( 50 V d.c. ...... 150 V d.c. )
(b) Maximum measuring voltage:
500 V a.c. phase-neutral / 866 V a.c. between phases
A special model for 110 V measuring is available:
100 V a.c. phase-neutral / 173 V a.c. between phases
(c) Maximum measuring current: Transformer of In / 5 A a.c.

----- Supply network analyzer CVMk and CVMk-ITF ------ Page Nº 4
2. MAIN CHARACTERISTICS
The CVMk power meter is a programmable measuring instrument, offering several
operation possibilities selectable in its SETUP option. Before power supplying the
instrument, read the CONNECTIONS and SETUP sections and choose the most
suitable operation mode for getting your desired data.
The CVMk is an instrument which measures, calculates and displays all the main
electrical parameters at any electrical network (balanced or not). The measuring is
true RMS value, through three a.c. Voltage inputs and three a.c. Current inputs (from
Current Transformers .../ 5A).
By means of an internal microprocessor it simultaneously measures:
parameter L1 L2 L3 Average Addition
Voltage (phase-neutral) x x x x
Voltage (phase-phase) x x x x
Current x x x x
Active power x x x x
Reactive power L x x x x
Reactive power C x x x x
Power factor x x x x
Apparent power x
Frequency x

----- Supply network analyzer CVMk and CVMk-ITF ------ Page Nº 5
and connecting the Energy + Clock module, besides:
Parameter CVMk CVMk-4C
Date/Time dd/mm/yy hh:mm:ss TIME TIME
Active energy ( two indep. meters in case of
the CVMk-4C: demanded energy (+) and
generated energy (--) )
kWh (+) kWh (+) and (--)
Reactive energy (inductive), two indep. meters kvarh.L (+) kvarh.L (+) and (--)
Reactive energy (capacitive), two indep. meters kvarh.C (+) kvarh.C (+) and (--)
---------------------------------------------------
The CVMk allows reading up to 30 electrical parameters (52 parameters with the
expansion modules), shown in 3 big numerical displays, where you can see:
(a) Phase-phase or phase-neutral voltage of the three phases
(b) 3 parameters of your choice (see attached table)
(c) 3 parameters of your choice (see attached table)
-------------------------------------------------------------------------------------------
And also the MAXIMUM POWER DEMAND: The power demand is integrated
during a prefixed period.
You can select: a.- The parameter to be controlled (it can measure active
power kW, apparent power kVA or three phase average
current AIII).
b.- the demand period (1 to 60 min.).
This power demand function works with sliding window : shows the accumulated
demand over the last period from "now".
** With the optional module CVM / RED-MAX it is also possible to select a power
demand function with external synchronism and fixed window.

----- Supply network analyzer CVMk and CVMk-ITF ------ Page Nº 6
2.1. Other Characteristics
-Panel mounting instrument of low dimensions (144 x 144 mm).
-True RMS measurements.
-Memorizes Maximum and Minimum values.
-Autoscaling during data reading.
-Display : LCD or LEDs (check frontal cover)
CVMk Displays of liquid crystal, 4 digits (LCD), dimensions: 67 x 26 mm
CVMk-4C Displays of liquid crystal, 5 digits (LCD), dimensions: 67 x 26 mm
CVMk-L
CVMk-L4 Displays of LEDs, 4 1/2 digits, green colour, dimen.: 60 x 20 mm
-Bubble keyboard, with 4 keys, for control and programming functions.
-3 x 3 LED indicators (red, green and yellow) to know the parameter shown on
display.
-Optional RS232 or RS485 communication modules.

----- Supply network analyzer CVMk and CVMk-ITF ------ Page Nº 7
3. INSTALLATION AND STARTUP
The manual you hold in your hands contains information and warnings that the user
should respect in order to guarantee a proper operation of all the instrument
functions and keep its safety conditions.
The instrument must not be powered and used until its definitive assembly on the
cabinet’s door.
Whether the instrument is not used as manufacturer’s specifications, the
protection of the instrument can be damaged.
When any protection failure is suspected to exist (for example, it presents external
visible damages), the instrument must be immediately powered off. In this case
contact a qualified service representative.
3.1. INSTALLATION
Before applying AC power to the, check following points :
a.- Supply voltage : see rear part of your CVMk
According CVMk model:
a.1.- CVMk .... : - Power supply Vac ( Single phase ) 50 ...60 Hz
230 V a.c. or 400 V a.c.
240 V a.c. or 480 V a.c.
110 V c.a.
- Frequency : 50 ... 60 Hz
- Supply tolerance : + 10 % / --15 %
- Connection terminals : Terminals 1 - 2 - 3 .
- Instrument burden : 3 VA

----- Supply network analyzer CVMk and CVMk-ITF ------ Page Nº 8
a.2.- CVMk... / SDC : - Power supply Vdc (only for LCD display version)
24 V d.c. ( 20 V d.c. ....... 64 V d.c. )
110 V d.c. ( 64 V d.c. ...... 130 V d.c. )
- Connection terminals : Terminals 1 - 2 - 3 .
- Instrument burden : 6 VA
b.- Maximum voltage at the voltage measuring circuit:
Standard : 500 V a.c. phase-neutral / 866 V c.a. between phases
A special model CVMk-ITF for 110 V measurement is also available:
100 V a.c. phase-neutral / 173 V a.c. between phases
c.- Maximum admissible current : Transformer of In / 5 A a.c.
d.- Operation conditions :
- Operating temperature : 0 to 50ºC
- Humidity : 25 to 80 % R.H. noncondensing
e.- Safety : Designed to meet protection class II as per EN 61010.
--------------------------------------------------------------------------

----- Supply network analyzer CVMk and CVMk-ITF ------ Page Nº 9
Mounting:
Instrument is to be mounted on panel (cutout 138+1 x 138+1 mm, as per DIN 43 700).
All connections keep inside the cabinet.
Note that with the instrument powered on, the terminals could be dangerous to
touching and cover opening actions or elements removal may allow accessing
dangerous parts. Therefore, the instrument must not be used until this is completely
installed.
The instrument must be connected to a power supply circuit protected with gl type
(IEC 269 ) or M type fuses rated between 0.5 and 2 A. This circuit should be provided
with an automatic switch (I / O ) or any equivalent element to connect (ON) or
disconnect (OFF) the instrument from the power supply network. The supply and
measuring voltage circuits will be both connected through a wire with a minimum
cross-section of 1 mm2.
The line of the current transformer secondary will have a minimum cross-section of
2,5 mm2.

----- Supply network analyzer CVMk and CVMk-ITF ------ Page Nº 10
3.2. Connection terminal
The CVMk has a connection terminal located at the side of the instrument to
connect the power supply and the incoming network measuring signals.
This connection terminal consists of: Standard CVM model = 12 terminals
CVM - ITF model = 13 terminals*
Termn.
nr. Parameter
13 * Neutral
12 VL1
11 VL2
10 VL3
9S1IL1
8S2IL1
7S1IL2
6S2IL2
5S1IL3
4S2IL3
Supply
CVMk....-
A.C. Supply
3 .... V
2 .... V
10V
CVMk ....- / SDC
D.C. Supply
3
2 --
1 +d.c.
NOTE: Current inputs are isolated in the ... ITF ../5 A model

----- Supply network analyzer CVMk and CVMk-ITF ------ Page Nº 11
3.3. Connection drawing for the Standard CVMk (12 terminal model - NON
ITF)
Connection diagram of the CVMk for a low voltage, three phase network.
NOTE : FOR A HIGH VOLTAGE NETWORK IS ALWAYS ADVISABLE TO
INSTALL THE CVMk- ITF... (isolated current inputs).

----- Supply network analyzer CVMk and CVMk-ITF ------ Page Nº 12
3.4. Connection drawing for the CVMk - ITF ( 13 terminal model - ITF )
a) Connection diagram of the CVMk-ITF for a low voltage, three phase network:
IMPORTANT REMARK! If power = 0 is shown for any of the phases (codes 03, 09
and 15) and voltage and current are not zero for this phase, check out following
points:
- Assure that L1, L2 and L3 phases coincide in voltage and current.
- Correct polarity? Reverse the current transformer placed at this phase.

----- Supply network analyzer CVMk and CVMk-ITF ------ Page Nº 13
b.- CVMk-ITF: 3 current transformers + two voltage transformer :

----- Supply network analyzer CVMk and CVMk-ITF ------ Page Nº 14
c.- CVMk-ITF : Two current transformers + 2 voltage transformers.
S2 of the current transformer grounded to earth

----- Supply network analyzer CVMk and CVMk-ITF ------ Page Nº 15
S1 of the current transformer grounded to earth

----- Supply network analyzer CVMk and CVMk-ITF ------ Page Nº 16
4. OPERATION MODE
The instrument has three displays, and each one has three LED indicators (red,
green and yellow). Every LED indicates the parameter presently shown by display.
When you switch on the power supply of the CVMk, all the 9 LED indicators will light
on for some seconds, and you will see on the display : "Circutor xxxx" (program
version) and following you will read "CARD TYPE xxxx" (identification of the
connected module). After some seconds the instrument is ready to work, showing
one of the three possible screens. One of the leds next to each display lights on
indicating the parameter being measured.
display
When the first LED (red) of every display is lighting on, it means that we are reading
VOLTAGE values. That is, the first display shows the voltage of phase L1 (V1), the
second one the voltage of phase L2 (V2) and third one the voltage of phase L3 (V3).
If you press the "display" key, the three red LEDs will light off, and the three green
LED will light on. It means that we are now reading the CURRENT values for each
phase (A1, A2, A3). However, this screen can be configured in order to display other
different parameters.
When pressing again the "display" key, the three yellow LEDs will light on and we
will see on display the three previously programmed parameters (see point 5.5. in the
SETUP section).
If you press the "display" key again you repeat the above mentioned process.

----- Supply network analyzer CVMk and CVMk-ITF ------ Page Nº 17
max
Pressing the "max" key, the maximum values for the parameters being shown
appear in the displays.
This function is only valid while you keep pressing the "max" key. If you stop
pressing the key the instantaneous values appear again.
When showing maximum values the LED indicators remain blinking.
min
Pressing the "min" key, the minimum values for the parameters being shown
appear in the displays.
This function is only valid while you keep pressing the "min" key. If you stop
pressing the key the instantaneous values appear again.
When showing minimum values the LED indicators remain blinking.
Reset
Pressing the "reset" key the system is reset. This is equivalent to switch off the
power supply of the instrument.
The stored maximum and minimum values will be automatically deleted from the
internal memory.
If you are in the setup process and press the "reset" key, you exit it without saving
any modification that you have done and making a reset of the system.

----- Supply network analyzer CVMk and CVMk-ITF ------ Page Nº 18
5. SETUP
To access into the setup menu just follow these steps:
(a) Connect (supply) the instrument.
(b) Press the two green buttons (max, min) simultaneously.
You will see during a few seconds the word "set". It means that we are in the setup
process. Then we go along the different options, step by step:
5.1. Phase-Phase or Phase-Neutral voltages
After the word "set" you will see on the three displays the voltages of the phases L1,
L2, L3.
U1 U12
U2 or U23
U3 U31
Phase to Neutral Voltages: U1 , U2 , U3
Phase to Phase Voltages : U12 , U23 , U31
a.- To select one of the voltage options just press the green key "max" and both
options will appear alternately.
b.- When you get in the display the wished option just press the "display" key to
validate it and access to the next setup option.

----- Supply network analyzer CVMk and CVMk-ITF ------ Page Nº 19
5.2. Voltage Transformer Primary
On the screen we read the word "SET U P" followed by 6 digits. They allow us
setting the primary of the voltage transformer.
SET U
P - - -
- - -
Last digit of the first display indicates "U" (Voltage) and first digit of the second
display indicates "P" (Primary). It means that we can set the primary of the voltage
transformer. To avoid mistakes the Voltage red LEDs remain lit on.
a.- To write or modify the value just repeatedly press the "max" key and the blinking
digit value will be increased.
b.- When the value on screen is the proper one, we can pass to the next digit by
pressing the "min" key in order to modify the other values.
c.- When the blinking digit is the last one, pressing the "min" key we go back to the
initial value: set values can be again modified.
d.- Press "display" to pass to the next setup option.