Circutor CVM-C4 Series User manual

Power analyzer
CVM-C4
INSTRUCTION MANUAL
(M267B01-03-21C)

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CVM-C4
Instruction Manual

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Instruction Manual
CVM-C4
SAFETY PRECAUTIONS
DANGER
Warns of a risk, which could result in personal injury or material damage.
ATTENTION
Indicates that special attention should be paid to a specific point.
Follow the warnings described in this manual with the symbols shown below.
If you must handle the unit for its installation, start-up or maintenance, the following should be
taken into consideration:
Incorrect handling or installation of the unit may result in injury to personnel as well as damage to the
unit. In particular, handling with voltages applied may result in electric shock, which may cause death
or serious injury to personnel. Defective installation or maintenance may also lead to the risk of fire.
Read the manual carefully prior to connecting the unit. Follow all installation and maintenance in-
structions throughout the unit’s working life. Pay special attention to the installation standards of the
National Electrical Code.
Refer to the instruction manual before using the unit
In this manual, if the instructions marked with this symbol are not respected or carried out correctly, it can result
in injury or damage to the unit and/or installations.
CIRCUTOR, SA reserves the right to modify features or the product manual without prior notification.
DISCLAIMER
CIRCUTOR, SA reserves the right to make modifications to the device or the unit specifications set
out in this instruction manual without prior notice.
CIRCUTOR, SA on its web site, supplies its customers with the latest versions of the device specifica-
tions and the most updated manuals.
www.circutor.com
CIRCUTOR, recommends using the original cables and accessories that are supplied
with the device.

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CONTENTS
SAFETY PRECAUTIONS .........................................................................................................................................................3
DISCLAIMER ..........................................................................................................................................................................3
CONTENTS.............................................................................................................................................................................4
REVISION LOG .......................................................................................................................................................................6
SYMBOLS...............................................................................................................................................................................6
1 . VERIFICATION UPON RECEPTION................................................................................................................................... 7
2 . PRODUCT DESCRIPTION ................................................................................................................................................ 7
3 . DEVICE INSTALLATION...................................................................................................................................................8
3.1.- PRIOR RECOMMENDATIONS ....................................................................................................................................8
3.2.- INSTALLATION .........................................................................................................................................................9
3.3.- DEVICE TERMINALS............................................................................................................................................... 10
3.4.- CONNECTION DIAGRAM..........................................................................................................................................11
3.4.1.- THREEPHASE NETWORK MEASURING WITH 4WIRE CONNECTION.............................................................11
3.4.2.- THREEPHASE NETWORK MEASURING WITH 3WIRE CONNECTION ........................................................... 12
4. OPERATION.................................................................................................................................................................... 14
4.1.- MEASURING PARAMETERS.................................................................................................................................... 14
4.2.- DISPLAY ................................................................................................................................................................. 15
4.3.- KEYBOARD FUNCTIONS......................................................................................................................................... 16
4.4.- RELAY OUTPUTS ................................................................................................................................................... 16
4.5.- ENERGY IMPULSE OUTPUTS ................................................................................................................................ 17
4.6.- DIGITAL INPUTS .................................................................................................................................................... 18
5. DISPLAY ........................................................................................................................................................................ 19
5.1.- SINGLE-PHASE NETWORK MEASURING................................................................................................................ 19
5.2.- THREE-PHASE NETWORK MEASURING WITH 4-WIRE CONNECTION ...................................................................22
5.3 THREE-PHASE NETWORK MEASURING WITH A 3-WIRE CONNECTION ..................................................................28
6. CONFIGURATION ...........................................................................................................................................................32
6.1.- CONFIGURATION OF THE INPUT ............................................................................................................................34
6.1.1.- MEASUREMENT SYSTEM ................................................................................................................................34
6.1.2.- PRIMARY VOLTAGE..........................................................................................................................................35
6.1.3.- SECONDARY VOLTAGE .....................................................................................................................................35
6.1.4.- PRIMARY CURRENT ........................................................................................................................................36
6.1.5.- SECONDARY CURRENT....................................................................................................................................36
6.1.6.- SAVE CONFIGURATION ....................................................................................................................................37
6.2.- RS-485 COMMUNICATIONS...................................................................................................................................37
6.2.1.- MODBUS ADDRESS .........................................................................................................................................38
6.2.2.- BAUD RATE .....................................................................................................................................................38
6.2.3.- DATA FORMAT.................................................................................................................................................39
6.2.4.- SAVE CONFIGURATION....................................................................................................................................39
6.3.- RELAY OUTPUT 1 ...................................................................................................................................................40
6.3.1.- RELAY MODE...................................................................................................................................................40
6.3.2.- RELAY PULSE DURATION................................................................................................................................ 41
6.3.3.- ALARM PARAMETER ......................................................................................................................................42
6.3.4.- ALARM VALUE.................................................................................................................................................43
6.3.5.- HYSTERESIS....................................................................................................................................................44
6.3.6.- CONNECTION DELAY.......................................................................................................................................45
6.3.7.- SAVE CONFIGURATION ....................................................................................................................................45
6.4.- RELAY OUTPUT 2...................................................................................................................................................45
6.5.- SYSTEM CONFIGURATION .....................................................................................................................................46
6.5.1.- ENERGY ACCUMULATION MODE ....................................................................................................................46
6.5.2.- CYCLIC DISPLAY .............................................................................................................................................47
6.5.3.- DISPLAY BACKLIGHT ......................................................................................................................................47
6.5.4.- INITIAL DISPLAY SCREEN...............................................................................................................................48
6.5.5.- ACCESS PASSWORD........................................................................................................................................48
6.5.6.- LIGHT ALARM .................................................................................................................................................49
6.5.7.- SAVE CONFIGURATION ....................................................................................................................................49
6.6.- CLEARING PARAMETERS.......................................................................................................................................50
6.6.1.- CLEARING ENERGIES......................................................................................................................................50
6.6.2.- SAVE CONFIGURATION....................................................................................................................................50
7. RS485 COMMUNICATIONS........................................................................................................................................... 51

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7.1.- CONNECTIONS ........................................................................................................................................................ 51
7.2.- MODBUS PROTOCOL ..............................................................................................................................................52
7.2.1. READING EXAMPLE: FUNCTION 0x01...............................................................................................................52
7.2.2. EXAMPLE OF OPERATION OF THE REMOTE CONTROL: FUNCTION 0x05.......................................................52
7.3.- MODBUS COMMANDS............................................................................................................................................53
7.3.1 .- MEASUREMENT VARIABLES AND DEVICE STATUS.........................................................................................53
7.3.2.- OUTPUT RELAYS..............................................................................................................................................55
7.3.3.- DIGITAL INPUTS...............................................................................................................................................56
7.3.4.- REMOTE CONTROL OUTPUT (Relay output) ...................................................................................................56
7.3.5.- DEVICE CONFIGURATION VARIABLES..............................................................................................................57
8. TECHNICAL FEATURES................................................................................................................................................. 60
9. MAINTENANCE AND TECHNICAL SERVICE ..................................................................................................................63
10. WARRANTY..................................................................................................................................................................63
11. CE CERTIFICATE ...........................................................................................................................................................64
ANNEX A. CONFIGURATION MENU....................................................................................................................................67

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REVISION LOG
Table 1: Revision log
Date Revision Description
11/19 M267B01-03-19A First Version
02/20 M267B01-03-20A Changes in the following sections:
3.4.- 8.
07/20 M267B01-03-20B Changes in the following sections:
3.4.2.- 7.1
09/20 M267B01-03-20C Changes in the following sections:
4.1.- 5.1. - 5.2.- 5.3.- 6.1.3.- 7.3.1. - 7.3.5.3.
02/21 M267B01-03-21A Changes in the following sections:
Symbols - 8.
05/21 M267B01-03-21B Changes in the following sections:
8.
07/21 M267B01-03-21C Changes in the following sections:
4.2.
Note: The images on the devices are for illustrative use only and may differ from the original device.
SYMBOLS
Table 2: Symbols.
Symbol Description
In accordance with the relevant European directive.
In accordance with the CMiM directive.
In accordance with the UKCA directive (UK Conformity Assessed)
Device covered by European Directive 2012/19/EC. At the end of its useful life, do not leave the
unit in a household waste container. Follow local regulations on electronic equipment recycling.
Direct current.
~Alternating current.

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CVM-C4
1 . VERIFICATION UPON RECEPTION
Upon reception of the device check the following points:
a) The device meets the specifications described in your order
b) The device has not suffered any damage during transport
c) Perform an external visual inspection of the device prior to switching it on
d) Check that it has been delivered with the following:
- An installation guide
If any problem is noticed upon reception, immediately contact the transport com-
pany and/or CIRCUTOR's after-sales service
2 . PRODUCT DESCRIPTION
The CVM-C4 is a device that measures, calculates and displays the main electrical parameters in sin-
gle-phase and three-phase networks.
The device has RS-485 communications, relay outputs, impulse outputs and digital inputs.
Current measurement is indirectly carried out by /5A or /1A transformers.
The device features:
- 3 keys that allow you to browse between the various screens and program the device
- LED Display to display all the parameters
- 2 relay outputs, fully programmable
- 2 digital inputs
- 2 impulse outputs, programmable
- RS-485 communications.
Table 3: List of CVM-C4 models
CVM-C4
Model Auxiliary power supply
80... 270 V ~ 80... 270 V 18.. 36 V
M52706   -
M527060030000 - - 

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3 . DEVICE INSTALLATION
3.1.- PRIOR RECOMMENDATIONS
In order to use the device safely, it is critical that individuals who handle it follow the
safety measures set out in the standards of the country where it is being used, using
the personal protective equipment necessary (rubber gloves, face protection and ap-
proved flame-resistant clothing) to prevent injuries due to electric shock or electric arc
as a consequence of exposure to current-carrying conductors and paying attention to
the various warnings indicated in this instruction manual.
The CVM-C4 device must be installed by authorised and qualified staff.
The power supply plug must be disconnected and measurement systems switched off before handling,
altering the connections or replacing the device. It is dangerous to handle the device while it is pow-
ered.
It is critical to keep wires in perfect condition to avoid accidents, personal injury or damage to instal-
lations.
Limit the operation of the device to measuring the specified current or voltage values.
The manufacturer of the device is not responsible for any damage resulting from failure by the user
or installer to heed the warnings and/or recommendations set out in this manual, nor for damage
resulting from the use of non-original products or accessories or those made by other manufacturers.
Do not use the device to take measurements if you detect an anomaly or malfunction.
Disconnect the device from the mains and from the power supply (both the device and
its measuring system) before performing any maintenance work, repairs or handling
any of the connections of the device.
Contact the after-sales service if you detect that the device is not working properly.

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3.2.- INSTALLATION
Terminals, opening covers or removing elements can expose parts that are hazard-
ous to the touch while the device is powered. Do not use the device until it is fully
installed.
The device should be installed inside an electric panel or enclosure, and panel-mounted.
The following steps must be taken for correct installation:
1.- Make a cut in the panel, according to the dimensions in Figure 1
91
91
Figure 1: Cut in the panel
2.- From outside, insert the device into the panel cut-out (Figure 2)
Figure 2: Insert the device
3 .- Fully insert the device and fasten it by using the spring (Figure 3)
Figure 3: Fully insert the device
The device must be connected to a power circuit protected by a fuse with a maximum nominal current

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Instruction Manual
of 0.25 A.
If the voltage to be measured is higher than the nominal input voltage, a voltage transformer must be
connected to the device.
If more than one device is connected to the current transformer, they must be connected in series.
Before disconnecting the current measurement connection cables, be sure to disconnect the trans-
former’s primary cables and bridge the secondary.
The device can operate in three-wire, three-phase mode or four-wire, three-phase mode, the user
selecting the corresponding connection mode according to the installation. An incorrect type of con-
nection or an error in phase sequence may cause measurement errors.
3.3.- DEVICE TERMINALS
Table 4: List of CVM-C4 terminals
Device terminals
1: L/+, Power supply 15: RO1, Relay Output 1 (Common)
2: N/-, Power supply 16: Relay Output 1 (NO)/Relay Output 2 (Common)
4: I1 S1, Current input L1 17: RO2: Relay output 2 (NO)
5: I1 S2, Current input L1 47: +, Impulse output 1
6: I2 S1, Current input L2 48:-, Impulse output 1
7: I2 S2, Current input L2 49: +, Impulse output 2
8: I3 S1, Current input L3 50:-, Impulse output 2
9: I3 S2, Current input L3 58: A, RS-485
11: U1, Voltage input L1 59: B, RS-485
12: U2, Voltage input L2 70: Common digital inputs
13: U3, Voltage input L3 71: DI1, Digital input 1
14: UN/U2, Voltage input N/L2 72: DI2, Digital input 2
5849 50 21
49
47 48
4
1
4 5 6 7
56789
89
11 12 13 14
47 48 59 70 71 72 15 16 17 18
59
50 58 72 70 71
17
15 16 2
14
13
11 12
Figure 4: CVM-C4 terminals

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CVM-C4
3.4.- CONNECTION DIAGRAM
3.4.1.- THREEPHASE NETWORK MEASURING WITH 4WIRE CONNECTION
12
L1
L2
L3
N
CARGA / LOAD
U1 U2 U3 UN
U1 U2 U3 UN
S1 S2 S1 S2 S1 S2
I1 I2 I3
U1 U2 U3 UN
+ -
Alimentación Auxiliar
Power Supply
S2S1
P2
P1 S2S1
P2
P1
S2S1
P2
P1
ba
B
A
ba
B
A
ba
B
A
Power
Supply
5849 50 21
45678911 12 13 14
47 48 59 70 71 72 15 16 17 18
Figure 5: Three-phase network measuring with 4-wire connection.

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Instruction Manual
3.4.2.- THREEPHASE NETWORK MEASURING WITH 3WIRE CONNECTION
+ -
12
L1
L2
L3
CARGA / LOAD
U1 U2
U3
U1
U2
U3
S1 S2 S1 S2 S1 S2
I1 I2 I3
U1 U2U3
Alimentación Auxiliar
Power Supply
S2S1
P2
P1
S2S1
P2
P1
ba
B
A
ba
B
A
Power
Supply
5849 50 21
45678911 12 13 14
47 48 59 70 71 72 15 16 17 18
Figure 6: Three-phase network measuring with 3-wire connection (Connection 1)
12
L1
L2
L3
CARGA / LOAD
U1 U2
U3
S1 S2 S1 S2 S1 S2
I1 I2 I3
U1 U2 U3
+ -
Alimentación Auxiliar
Power Supply
S2S1
P2
P1 S2S1
P2
P1
S2S1
P2
P1
Power
Supply
5849 50 21
45678911 12 13 14
47 48 59 70 71 72 15 16 17 18
Figure 7: Three-phase network measuring with 3-wire connection (Connection 2)

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CVM-C4
12
L1
L2
L3
CARGA / LOAD
U1 U2 U3
S1 S2 S1 S2 S1 S2
I1 I2 I3
U1 U2 U3
+ -
UN
Alimentación Auxiliar
Power Supply
S2S1
P2
P1 S2S1
P2
P1
S2S1
P2
P1
ba
B
A
ba
B
A
ba
B
A
Power
Supply
5849 50 21
45678911 12 13 14
47 48 59 70 71 72 15 16 17 18
Figure 8: Three-phase network measuring with 3-wire connection (Connection 3)

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4. OPERATION
4.1.- MEASURING PARAMETERS
The CVM-C4 is a four-quadrant power analyzer (consumption and generation) that operates according
to the IEC measurement convention (Figure 9).
Q
P
Q1Q2
Q3 Q4
P < 0 Q > 0 PF <0
Capacitive
Capacitive
Inductive
Inductive
P < 0 Q < 0 PF <0 P > 0 Q < 0 PF >0
P > 0 Q > 0 PF >0
Operation in the 4 quadrants (Q1, Q2, Q3, Q4)
0 +
0 +
cos φ >0
cos φ >0
Q1
Q4
+ 1
+ 1
cos φ values in the receiver operating mode (Q1,Q4)
Figure 9: IEC measurement convention.
The device displays the electrical parameters shown in Table 5.
Table 5: Measuring parameters
Parameter Units Phases
L1-L2-L3
Total
III
Phase-Neutral Voltage k/V 
Phase-Phase Voltage k/V 
Current k/A 
Frequency Hz 
Active Power M/kW  
Reactive Power M/kvar  
Apparent Power M/kVA  
Power factor PF  
THD Voltage %
THD Current % 
Reactive energy (consumption and generation) M/kWh 
Active energy Tariff 1 and 2 M/kWh 
Reactive energy (consumption and generation) M/kvar 
Reactive energy Tariff 1 and 2 M/kvar 
Harmonic distortion rate (THD) is defined as the ratio between the RMS value of the harmonic content
of the voltage and/or current and the value of the fundamental component:

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CVM-C4
=()


=()


()=
× 100(%)
()=
× 100(%)


=(

)



=()


()=
× 100(%)
()=
× 100(%)
Equation 1: Voltage THD.
=()


=()


()=
× 100(%)
()=
× 100(%)
=()




=(

)



()=
× 100(%)
()=
× 100(%)
Equation 2: Current THD.
4.2.- DISPLAY
The device has a 3-line, 4-digit LCD display divided into 2 zones:
Data area
Units and
symbols
area
WA
Figure 10: Display CVM-C4.
The data area, which displays all the values measured by the device.
The units and symbols area, which displays the different statuses, units and device information
(Table 6).
Table 6: Display icons.
Icon Description Icon Description
WA
Inductive
WA
Configuration screen
WA
Capacitive
WA
RS-485 communications:
- Flashing: RS-485 communications OK
- Not flashing: RS-485 communications error
WA
Indicates that the value is total for the Active Power, Reactive Power, Apparent Power
and Power Factor parameters.

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4.3.- KEYBOARD FUNCTIONS
The CVM-C4 has 3 keys that allow you to browse through and program the device, Table 7 and Table 8.
Display screens:
Table 7: Keyboard function: Display screens.
Key Keystroke
Previous screen.
Next screen.
Long keystroke (> 3s):
Accesses the configuration menu
Configuration screens:
Table 8: Keyboard function: Configuration screens.
Key Keystroke
Browses through the different menu screens.
Browses through the different options.
Browses through the different menu screens.
Browses through the different options.
Skips to the next configuration menu.
Changes the digit's value.
Long keystroke (> 3s):
Enables the value's configuration
Validates the configuration parameter
4.4.- RELAY OUTPUTS
The device features two programmable relay outputs (terminals 15, 16 and 17 in Figure 11) that can be
programmed as remote control signals or alarms in the configuration menu ("6.3.- RELAY OUTPUT 1"
and "6.4.- RELAY OUTPUT 2").
17
15
Relé 1
Relay 1
Relé 2
Relay 2
Figure 11: Relay outputs

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CVM-C4
4.5.- ENERGY IMPULSE OUTPUTS
The device features energy impulse outputs (terminals 47, 48, 49 and 50 in Figure 12).
Vcc
50
47 ++
- -
Salidas de pulsos de energía
Energy pulse outputs
Figure 12: Energy impulse outputs
The type of energy impulses is selected in section “6.5.1.- ENERGY ACCUMULATION MODE”.
If option 4q is selected, the device generates:
Impulse output 1 (terminals 47 and 48): Active energy impulses consumed (positive).
Impulse output 2 (terminals 49 and 50): Active energy impulses generated (negative).
If option 2tis selected, the device generates:
Impulse output 1 (terminals 47 and 48): Active energy impulses consumed (positive) in tariff 1.
Impulse output 2 (terminals 49 and 50): Active energy impulses consumed (positive) in tariff 2.
The impulse output ratio is set to 5000 imp/kWh, that is, when the device accumulates an energy of
1 kWh, 5000 impulses exit the impulse output.
We have to consider that in relation to this ratio the energy is calculated by the device, taking into
account the programmed voltage and current transformation ratios.
Thus, the actual energy can be calculated as:
í=∗ 1ℎ
5000 ∗∗
=1
2
=1
2
=∗ 1ℎ
5000 ∗∗
Éé=∗ 1ℎ
5000 ∗∗
ℎ=∗ 1ℎ
5000 ∗∗
Where:
N: No. of impulses.
Rv: Voltage ratio, ratio between primary and secondary voltage.
í=∗ 1ℎ
5000 ∗∗
=1
2
=1
2
=∗ 1ℎ
5000 ∗∗
Éé=∗ 1ℎ
5000 ∗∗
ℎ=∗ 1ℎ
5000 ∗∗
Rc: Current ratio, ratio between primary and secondary current.

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í=∗ 1ℎ
5000 ∗∗
=1
2
=1
2
=∗ 1ℎ
5000 ∗∗
Éé=∗ 1ℎ
5000 ∗∗
ℎ=∗ 1ℎ
5000 ∗∗
Note: The device calculates and displays the active and reactive energy, but the energy impulse output
is only active energy.
4.6.- DIGITAL INPUTS
The device has two digital inputs (terminals 70, 71 and 72 in Figure 13). The relay outputs can be acti-
vated depending on the value of the digital inputs (see "6.3.- RELAY OUTPUT 1" and "6.4.- RELAY OUTPUT
2").
If the energy accumulation mode programmed is 2t(“6.5.1.- ENERGY ACCUMULATION MODE” digital
input 1,DI1, is used to change the tariff:
DI1 open: tariff 1.
DI1 closed: tariff 2.
72
70
+
-
+24V
Entradas Digitales
Digital inputs
COM
DI1 DI2
Figure 13: Digital inputs.

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CVM-C4
5. DISPLAY
The CVM-C4 has up to 24 display screens depending on the measurement system, see “6.1.1.-
MEASUREMENT SYSTEM".
5.1.- SINGLE-PHASE NETWORK MEASURING
The CVM-C4 has 15 display screens in the single-phase network measurement system, Table 9.
Use the keys and to browse through the different screens.
The display screens can change automatically depending on the time programmed in the section
“6.5.2.- CYCLIC DISPLAY”.
The initial display screen, i.e. the first screen displayed when feeding the device or when exiting the
configuration menu, can be programmed in section “6.5.4.- INITIAL DISPLAY SCREEN”.
Table 9: Display menu: Single-phase network measuring
Display menu: Single-phase network measuring
2200
V
.
Voltage (V/kV)(1)
5010
A
.
Current (A/kA)(2)
5000
Hz
.
Frequency (Hz)
(1) For values of V ≥ 9000, the device automatically switches the units to kV.
(2) For values of A ≥ 9000, the device automatically switches the units to kA.

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CVM-C4
Instruction Manual
Table 9 (Continued). Display menu: Single-phase network measuring
Display menu: Single-phase network measuring
5700
W
Ʃ
Active Power (W)
2200
VAR
Ʃ
Reactive power (var)
2200
VA
Ʃ
Apparent power (VA)
0980PF
.
Ʃ
Power factor
Energy Accumulation Mode:4q
EP
0388
6677
W h
.
k
Total positive active energy (kWh)
Energy Accumulation Mode:2t
EPit
0388
6677
.
.
W h
k
Total positive active energy, Tariff 1(kWh)