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Circutor CVM-C4 Power Analyzer

Product model: CVM-C4-ITF-485-ICT2 | Code: M52706

Introduction

The Circutor CVM-C4 is a compact 96 x 96 mm panel-mounted power analyzer for single-phase and three-phase electrical networks. It measures, calculates and displays key electrical parameters using true RMS measurement, with indirect current measurement through /5 A or /1 A current transformers.

Positioning Statement

A compact multifunction panel analyzer for sites that need essential electrical measurement, energy logging, RS-485 Modbus communication and local alarm outputs in a space-saving installation depth.

Key Webpage Highlights

Compact 96 x 96 mm panel-mounted analyzer with only 41.5 mm depth.
Measures main electrical parameters for single-phase and three-phase networks, with or without neutral.
True RMS measurement using 3 AC voltage inputs and 3 current inputs.
Indirect current measurement via /5 A or /1 A current transformers.
RS-485 communication with Modbus RTU for SCADA, master system or remote data readout.
2 relay outputs for local alarm or control actions.
2 digital inputs for tariff/source selection and dual energy metering applications.
2 passive impulse transistor outputs for energy pulses up to 5000 imp/kWh.
Active and reactive energy logging for consumed or generated energy.
Voltage and current THD% measurement for basic harmonic visibility.
4-quadrant measurement and programmable voltage transformer ratio.

Product Description

The CVM-C4 is a multifunction power analyzer designed for electrical panels where space is limited but essential measurement and communication capability is required. The analyzer measures, calculates and displays the main electrical parameters of single-phase and three-phase installations, including networks with or without neutral. It supports true RMS measurement through three voltage inputs and three current inputs, with current measurement carried out through /5 A or /1 A external current transformers.
With RS-485 Modbus RTU communication, the CVM-C4 can be integrated into SCADA, EMS, BMS or other master systems for remote data readout and centralised monitoring. The relay outputs enable local operation when alarm conditions occur, while the digital inputs and impulse outputs support tariff/source metering and energy pulse applications.

Typical Applications

Application Area	How CVM-C4 Helps
Compact electrical panels	Suitable for panels with limited installation depth or limited front panel space.
Electrical parameter monitoring	Displays instantaneous values of key electrical parameters locally on the LCD screen.
SCADA / EMS integration	RS-485 Modbus RTU enables remote data collection and centralised monitoring.
Energy metering	Logs consumed or generated active and reactive energy.
Alarm and local control	Relay outputs can be programmed to activate based on alarm conditions.
Tariff or source separation	Digital inputs can be used to measure energy from two different sources or tariffs.
Harmonic visibility	Voltage and current THD% measurements help check harmonic presence in the installation.

Feature Table

Feature	Datasheet Detail	Webpage Value
Panel mounting	96 x 96 mm, 41.5 mm depth	Compact installation for low-voltage panels and retrofit applications.
Network support	Single-phase and three-phase networks, with or without neutral	Flexible use across common electrical distribution configurations.
Measurement method	True RMS measurement	More reliable reading under non-ideal electrical conditions.
Current input	.../5 A \| .../1 A	Works with standard external CT ratios.
Voltage input	3 AC voltage inputs	Measures the main voltage parameters for three-phase systems.
Communication	RS-485, Modbus RTU	Suitable for SCADA, EMS, BMS and remote monitoring systems.
Relay outputs	2 relay outputs	Supports local alarm or control actions.
Digital inputs	2 potential-free digital inputs	Useful for source/tariff selection and dual energy metering.
Transistor outputs	2 passive impulse outputs	Supports energy pulse output applications.
Harmonic check	Voltage and current THD%	Basic harmonic visibility for installation health checks.

Product Identification

Parameter	Value
Product family	CVM-C4
Model	CVM-C4-ITF-485-ICT2
Code	M52706
Product type	Power analyzer / multifunctional multimeter for panel
Mounting	Panel
Protocol	Modbus RTU
Communication	RS-485
Measuring current channels	3
Input current	.../5 A \| .../1 A
Transistor outputs	2
Relay outputs	2
Digital inputs	2

Power Supply

Parameter	Value
AC nominal voltage	80 ... 270 Vac
AC frequency	50/60 Hz
AC consumption	6 ... 18 VA
AC installation category	CAT III 300 V
DC nominal voltage	80 ... 270 Vdc
DC consumption	1.5 ... 1.8 W
DC installation category	CAT III 300 V

Mechanical and Environmental

Parameter	Value
Dimensions	96 x 96 x 41.5 mm
Envelope	Polycarbonate + ABS
Torque setting	0.5 Nm
Terminal cable gauge	2.5 mm2
Weight	0.268 kg
Protection class	Front: IP54, Rear: IP20
Relative humidity	5 ... 95%, without condensation
Storage temperature	-20 ... +70 °C
Operating temperature	-10 ... +60 °C

Current Measurement Circuit

Parameter	Value
Installation category	CAT III 300 V
Nominal current	1 A / 5 A AC
Consumption	< 0.2 VA per phase
Allowable overload	1.2 In continuous, 10 In instantaneous for 5 s

Voltage Measurement Circuit

Parameter	Value
Installation category	CAT III 300 V
Nominal voltage	100 ... 277 V Ph-N, ±8%
Sampling / frequency range	45 ... 65 Hz
Input impedance	> 1.7 MΩ
Consumption	< 0.2 VA per phase
Maximum permanent measurement voltage	1.2 Un continuous, 2 Un instantaneous

Communication

Parameter	Value
Protocol	Modbus RTU
Interface	RS-485
Speed	2400 / 4800 / 9600 / 19200 bps
Data bits	8
Stop bits	1-2
Parity	None / Even / Odd

User Interface and I/O

Parameter	Value
Display type	LCD
Keyboard	3 keys
Digital inputs	2 potential-free contacts
Digital input insulation	3.75 kV RMS
Maximum short-circuit current	4 mA
Maximum open circuit voltage	30 V
Relay outputs	2 relay outputs
Relay resistive load	250 Vac / 5 Aac, 30 Vdc / 5 Adc
Relay maximum switching capacity	1385 VA / 150 W
Transistor output type	Passive impulse
Transistor maximum frequency	10 Hz
Transistor maximum current	27 mA
Transistor maximum voltage	27 Vdc

Measurement Accuracy

Parameter	Value
Frequency	0.5%
Phase current	0.2%
Phase voltage	0.2%
Active power	0.5%
Reactive power	0.5%
Active energy	0.5%
Reactive energy	0.5%

Standards

Parameter	Value
Electrical safety maximum height	2000 m
Electrical safety installation category	CAT III 300 V
Contamination level / class	Pollution resistance 2
Standards	IEC 61010-1, IEC 61000-4-2, IEC 61000-4-3, IEC 61000-4-4, IEC 61000-4-5, IEC 61000-4-6, IEC 61000-4-8, IEC 61000-4-11

Model / Ordering Table

Code	Type	Input Current	Transistor Output	No. Relays	Digital Inputs	Communication	Protocol
M52706	CVM-C4-ITF-485-ICT2	.../5 A \| .../1 A	2	2	2	RS-485	Modbus RTU

Additional note: 4-quadrant measuring unit. Can be used to program the voltage transformer ratio.

Product image

Dimensions and connection overview

Dimensions

Connection diagram

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