DISCLAIMER CIRCUTOR, SA reserves the right to make modifi cations to the device or the unit specifi ca- tions 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 specifi cations and the most updated manuals. www.circutor.com CIRCUTOR, recommends using the original cables and accessories that are supplied with the device.
CVM-C4 REVISION LOG Table 1: Revision log Date Revision Description 11/19 M267B01-03-19A First Version Changes in the following sections: 02/20 M267B01-03-20A 3.4. - 8. Changes in the following sections: 07/20 M267B01-03-20B 3.4.2. - 7.1 SYMBOLS Table 2: Symbols� Symbol Description In accordance with the relevant European directive.
Check that it has been delivered with the following: - An installation guide If any problem is noticed upon reception, immediately contact the transport company 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 single-phase and three-phase networks.
CVM-C4 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 approved flame-resistant clothing) to prevent injuries due to elec- tric shock or electric arc as a consequence of exposure to current-carrying con- ductors and paying attention to the various warnings indicated in this instruction...
CVM-C4 3.2.- INSTALLATION Terminals, opening covers or removing elements can expose parts that are hazardous 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...
CVM-C4 current 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.
CVM-C4 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 Operation in the 4 quadrants (Q1, Q2, Q3, Q4) cos φ values in the receiver oper >...
CVM-C4 4.2.- DISPLAY The device has a LCD display with 3 lines, 4 digits each, to view the measured parameters and to configure the device. Units 0000 0000 0000 Con guration Figure 10: Display CVM-C4� 4.3.- KEYBOARD FUNCTIONS The CVM-C4 has 3 keys that allow you to browse through and program the device, Table 6 and Table 7 ...
CVM-C4 4.4.- RELAY OUTPUTS The device features two programmable relay outputs (terminals 15, 16 and 17 in ) that Figure 11 can be programmed as remote control signals or alarms in the configuration menu ( "6.3.- RE- LAY OUTPUT 1" and "6.4.- RELAY OUTPUT 2" Relé 2 Relé 1 Relay 2 Relay 1 Figure 11: Relay outputs 4.5.- ENERGY IMPULSE OUTPUTS Salidas de pulsos de energía...
1 CVM-C4 2 1 The impulse output ratio is set to 5000 imp /kWh, that is, when the device accumulates an en- 2 ergy 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.
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 Use the keys to browse through the different screens.
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CVM-C4 Table 8 (Continued)� Display menu: Single-phase network measuring Display menu: Single-phase network measuring Ʃ 5700 Active Power (W) Ʃ 2200 Reactive power (var) Ʃ 2200 Apparent power (VA) Ʃ 0980 Power factor Energy Accumulation Mode : Energy Accumulation Mode : EPit 0388 0388...
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CVM-C4 Table 8 (Continued)� Display menu: Single-phase network measuring Display menu: Single-phase network measuring Energy Accumulation Mode : Energy Accumulation Mode : EP - EP2t 1620 1620 0300 0300 Total negative active energy (kWh) Total positive active energy, Tariff 2 (kWh) Energy Accumulation Mode : Energy Accumulation Mode : E91t...
CVM-C4 Table 8 (Continued)� Display menu: Single-phase network measuring Display menu: Single-phase network measuring Status of digital inputs 1, status of digital input 1: flashes when the input has been activated. 2, status of digital input 2: flashes when the input has been activated. Status of relay outputs 1, status of relay output 1: flashes when the relay has been activated. 2, status of relay output 2: flashes when the relay has been activated. If the input voltage or current value higher than a % of the nominal value, the device can make the digits on the display start flashing, in the form of a light alarm.
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CVM-C4 Table 9: Display menu: Three-phase network measuring with 4-wire connection� Display menu: Three-phase network measuring with 4-wire connection� 2206 2207 2208 Phase-Neutral Voltage (V) 3800 L1-2 3801 L2-3 3803 L3-1 Phase-Phase Voltage (V) Current (A) 5000 Frequency (Hz) 5701 5703 5704 Active power per phase (W)
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CVM-C4 Table 9 (Cont�)� Display menu: Three-phase network measuring with 4-wire connection� Display menu: Three-phase network measuring with 4-wire connection� 6805 6806 6807 Reactive power per phase (var) 7808 7817 7815 Apparent power per phase (VA) Ʃ 5700 Total Active Power (W) Ʃ...
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CVM-C4 Table 9 (Cont�)� Display menu: Three-phase network measuring with 4-wire connection� Display menu: Three-phase network measuring with 4-wire connection� 0932 0931 0930 Power factor per phase 0932 Ʃ 0980 Total Power Factor Energy Accumulation Mode : Energy Accumulation Mode : EPit 0388 0388...
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CVM-C4 Table 9 (Continued)� Display menu: Three-phase network measuring with 4-wire connection� Display menu: Three-phase network measuring with 4-wire connection� Energy Accumulation Mode: Energy Accumulation Mode: E92t Eq - VARh VARh 1500 1500 2005 2003 Total negative reactive energy (kvarh) Total positive reactive energy, Tariff 2 (kvarh) 0416 THD Voltage L1...
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CVM-C4 Table 9 (Cont�)� Display menu: Three-phase network measuring with 4-wire connection� Display menu: Three-phase network measuring with 4-wire connec- tion� 0305 THD Current L2 0311 THD Current L3 Status of digital inputs 1, status of digital input 1: flashes when the input has been activated. 2, status of digital input 2: flashes when the input has been activated. Status of relay outputs: 1, status of relay output 1: flashes when the relay has been activated.
CVM-C4 5.3 THREE-PHASE NETWORK MEASURING WITH A 3-WIRE CONNECTION The CVM-C4 has 18 display screens in the three-phase network measurement system with a 3-wire connection, Table 10 Use the keys to browse through the different screens. The display screens can change automatically depending on the time programmed in the sec- tion ”.
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CVM-C4 Table 10 (Cont�): Display menu: Three-phase network measuring with 3-wire connection� Display menu: Three-phase network measuring with 3-wire connection� Ʃ 2200 Total Reactive Power� (var) Ʃ 2200 Total Apparent Power (VA) Ʃ 0980 Total Power Factor Energy Accumulation Mode: Energy Accumulation Mode: EPit 0388...
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CVM-C4 Table 10 (Continued): Display menu: Three-phase network measuring with 3-wire connection� Display menu: Three-phase network measuring with 3-wire connection� Energy Accumulation Mode: Energy Accumulation Mode: E91t VARh VARh 3002 3002 0102 0102 Total positive reactive energy (kvarh) Total positive reactive energy, Tariff 1 (kvarh) Energy Accumulation Mode: Energy Accumulation Mode: E92t...
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CVM-C4 Table 10 (Cont�)� Display menu: Three-phase network measuring with 3-wire connection� Display menu: Three-phase network measuring with 3-wire connec- tion� 0305 THD Current L2 0311 THD Current L3 Status of digital inputs 1, status of digital input 1: flashes when the input has been activated. 2, status of digital input 2: flashes when the input has been activated. Status of relay outputs 1, status of relay output 1: flashes when the relay has been activated.
CVM-C4 6�- CONFIGURATION Press and hold the key for more than 3 seconds to enter the device's configuration menu. The device's configuration is organised in different menus, Figure 14 2206 2207 2208 >3s ProG CodE >3s 0000 >3s inpt Con guration of the input Con1 Addr RS-485 Communications 0001 do-1 >3s nodE Relay output 1 do-2 nodE Relay output 2 System nodE Con guration...
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CVM-C4 Before accessing the configuration menu, it is necessary to enter the access password. ProG CodE CodE 2206 >3s >3s 2207 0000 0001 2208 >3s inpt Figure 15: Access to the configuration menu in the programming mode. Use the key to modify the value of the flashing digit. When the desired value is shown on the screen, press the keys to skip the digit.
CVM-C4 6.1.- CONFIGURATION OF THE INPUT shows the input configuration menu from which the measurement system and the Figure 16 primary and secondary current and voltage are configured. inpt inpt >3s Measurement system inpt inpt >3s pt 1 pt 1 Primary voltage 0380 0380 inpt inpt >3s pt 2 pt 2 Secondary voltage 0380 0380 inpt inpt >3s Ct 1 Ct 1 Primary current...
CVM-C4 With a long keystroke, press to validate the option. Use the keys to browse through the menu screens. 6�1�2�- PRIMARY VOLTAGE This screen is used to configure the value of the primary voltage. inpt inpt >3s pt 1 pt 1 0380 0380 With a long keystroke (>3s), press to access the value's configuration. Use the key to modify the value of the flashing digit.
CVM-C4 Use the keys to browse through the menu screens. 6�1�4�- PRIMARY CURRENT This screen is used to configure the value of the primary current. inpt inpt >3s Ct 1 Ct 1 0005 0005 With a long keystroke (>3s), press to access the value's configuration. Use the key to modify the value of the flashing digit. When the desired value is shown on the screen, press the keys to skip the digit.
CVM-C4 6�1�6�- SAVE CONFIGURATION This screen is used to save the device's configuration. SAuE SAuE >3s With a long keystroke (>3s), press to access the value's configuration. Use the keys to browse through the different options: , to not save the configuration. , to save the configuration. With a long keystroke, press to validate the option. The device skips to the main screen of the next configuration menu.
CVM-C4 6�2�1�- MODBUS ADDRESS This screen is used to configure the device's modbus address. Con1 Con1 >3s Addr Addr 0001 0001 With a long keystroke (>3s), press to access the value's configuration. Use the key to modify the value of the flashing digit. When the desired value is shown on the screen, press the keys to skip the digit. Minimum configuration value: 1 Maximum configuration value: 247 With a long keystroke, press to validate the data.
CVM-C4 6�2�3�- DATA FORMAT This screen is used to configure the data format. Con1 Con1 >3s dAtA dAtA With a long keystroke (>3s), press to access the value's configuration. Use the keys to browse through the different options: n.8.1 , no parity, 8 data bits, 1 stop bit E.8.1, even parity, 8 data bits, 1 stop bit o.8.1 odd parity, 8 data bits, 1 stop bit n.8.2...
CVM-C4 , relay output 1 is disabled. , remote control output. , alarm output. With a long keystroke, press to validate the option. Use the keys to browse through the menu screens. 6�3�2�- RELAY PULSE DURATION Note: Visible variable if the relay operating mode has been configured as a remote control out- put or alarm output.
CVM-C4 6�3�3�- ALARM PARAMETER Note: Visible variable if the relay operating mode has been configured as an alarm output. This screen is used to configure the parameter on which the alarm will be activated. do-1 do-1 >3s itEn itEn Un H Un H With a long keystroke (>3s), press to access the value's configuration. Use the keys to browse through the different options: Un.
CVM-C4 6�3�4�- ALARM VALUE Note: Visible variable if the relay operating mode has been configured as an alarm output. Not visible if the alarm parameter is the digital inputs ( di-1, di-0, d2-1, d2-0). The display value after which the alarm will be activated is configured on this screen. do-1 do-1 >3s 0000 0000 With a long keystroke (>3s), press to access the value's configuration.
CVM-C4 6�3�5�- HYSTERESIS Note: Visible variable if the relay operating mode has been configured as an alarm output. Not visible if the alarm parameter is the digital inputs ( di-1, di-0, d2-1, d2-0). This screen is used to configure the hysteresis value, i.e., the difference between the alarm connection and disconnection value. do-1 do-1 >3s 0000 0000...
CVM-C4 6�3�6�- CONNECTION DELAY Note: Visible variable if the relay operating mode has been configured as an alarm output. This screen is used to configure the alarm connection delay do-1 do-1 >3s dELy dELy 0000 0000 With a long keystroke (>3s), press to access the value's configuration. When the desired value is shown on the screen, press the keys to skip the digit.
CVM-C4 , the active and reactive energy accumulate in consumption (positive). Tariffs 1 and 2 are displayed for each of them. With a long keystroke, press to validate the option. Use the keys to browse through the menu screens. 6�5�2�- CYCLIC DISPLAY The display screens can change automatically or not.
CVM-C4 6�5�4�- INITIAL DISPLAY SCREEN In this section the initial display screen is configured. >3s diSP diSp With a long keystroke (>3s), press to access the value's configuration. Use the keys to browse through the different options: , voltage screen. , current screen. , frequency screen. , power screen. , power factor screen. , energy screen.
CVM-C4 6�5�6�- LIGHT ALARM If the device's input voltage or current value is higher than a % of the nominal value, the device can make the digits on the display start flashing, in the form of a light alarm. >3s With a long keystroke (>3s), press to access the value's configuration. When the desired value is shown on the screen, press the keys to skip the digit.
CVM-C4 6.6.- CLEARING PARAMETERS shows the configuration menu for clearing parameters. Figure 20 >3s Clearing energies CLrE CLrE SAuE SAuE >3s Save con guration Figure 20: Configuration menu for clearing parameters. 6�6�1�- CLEARING ENERGIES This screen is used to configure clearing or not energy parameters. >3s CLrE CLrE With a long keystroke (>3s), press to access the value's configuration. Use the keys to browse through the different options: , the energy parameters are not deleted.
CVM-C4 7�- RS-485 COMMUNICATIONS The CVM-C4 devices have an RS-485communications port, with communications protocol: MODBUS RTU ®. 7.1.- CONNECTIONS The RS-485 cable must be wired using twisted pair cable with mesh shield, leaving a maximum distance between the CVM-C4 and the master device of 1200 metres A maximum of 32 CVM-C4 devices can be connected to this bus.
CVM-C4 7.2.- MODBUS PROTOCOL In the Modbus protocol, the CVM-C4 device uses the RTU (Remote Terminal Unit) mode. The Modbus functions implemented in the device are as follows: Function 0x01: Reading a relay. Function 0x02: Reading input status. Function 0x03 and 0x04: Reading integer registers. Function 0x05: Writing a relay.
CVM-C4 Response: Initial Address Function Relay action Register 0000 FF00 8C3A 7.3.- MODBUS COMMANDS 7�3�1 �- MEASUREMENT VARIABLES AND DEVICE STATUS All Modbus map addresses are in Hexadecimal format. Function 0x03 and 0x04 are implemented for these variables. Table 11: Modbus Memory Map (Table 1) Measurement Variables Parameter Format...
CVM-C4 7�3�3�- DIGITAL INPUTS All the addresses of Modbus memory are in Hexadecimal. For these variables is implemented the Function 0x02� Table 18:Modbus Memory Map (Table 6) Parameter Format Address Digital inputs 0000 The format of the parameter is shown in Table 19: Table 19: Variable format: Digital inputs�...
CVM-C4 7�3�5�- DEVICE CONFIGURATION VARIABLES All Modbus map addresses are in Hexadecimal format. Function 0x10 is implemented for this variable. 7.3.5.1. Input configuration Table 23: Modbus Memory Map: Input configuration Input configuration Variable Format Address Valid data range Byte 1: 0: n.34, three-phase network measuring with 4-wire.
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CVM-C4 Table 25 (Continued): Modbus Memory Map: Relay Outputs� Relay outputs Variable Format Address Valid data range Relay 1 alarm parameter 0: Active alarm when the Phase - Neutral voltage is higher than the alarm value ( Un. H 1: Active alarm when the Phase - Neutral voltage is lower than the alarm value ( Un.
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CVM-C4 Table 25 (Continued): Modbus Memory Map: Relay Outputs� Relay outputs Variable Format Address Valid data range Relay 1 connection delay 00,00 ... 99.99 s Relay 2 connection delay If 00.00 is programmed, the relay is activated when the alarm is triggered and is deactivated when the alarm is deactivated.
CVM-C4 8�- TECHNICAL FEATURES AC Power supply Rated voltage 80... 270 V ~ Frequency 50 / 60 Hz Consumption 6... 18 VA Installation category CAT III 300V DC Power supply Rated voltage 80... 270 V 18... 36 V Consumption 1.5 ...1.8 W 1,8...
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CVM-C4 Digital inputs Quantity Type Potential free contact Insulation 3.5kV rms Maximum short-circuit current 4 mA Maximum voltage in open circuit Impulse outputs Type Passive pulse Maximum voltage 27 V Maximum current 27 mA Maximum frequency 10 Hz Minimum pulse width 80 mA RS-485 Communications Communications protocol...
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CVM-C4 (Continued) Standards Electromagnetic compatibility (EMC) Part 4-11: Testing and measurement tech- IEC 61000-4-11 niques� Voltage dips, short interruptions and voltage variations immunity tests Safety requirements for electrical equipment for measurement, control and lab- IEC 61010-1 oratory use� Part 1: General requirements� 4(max) 41.5 Figure 22: Dimensions of the CVM-C4�...
• CIRCUTOR accepts no liability due to the possible damage to the unit or other parts of the installation, nor will it cover any possible sanctions derived from a pos- sible failure, improper installation or “improper usage”...
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