VM-3P75CT Energy Meter – 3-phase, up to 75A/phase – REL200300100

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SKU: REL200300100

5 year warranty

Made to order

Victron Energy VM-3P75CT (part number REL200300100) is a three-phase energy meter supplied with three 75 A split-core current transformers, designed for high-precision measurement of AC consumption or generation. Developed for the Victron Energy ecosystem, the meter connects to Cerbo GX, Ekrano GX, or Venus GX devices via Ethernet or VE.Can ports. It is used in Energy Storage Systems (ESS) to monitor a site's total consumption, track solar power generation, or measure power on specific circuits.

Key advantages of the VM-3P75CT energy meter

75 A current transformers included — 3 split-core sensors (Snap-on CTs) install without disconnecting power cables
Measurement in three-phase, split-phase, and single-phase networks up to 75 A per phase
Dual data interfaces: Ethernet (RJ45) and VE.Can (2x RJ45, terminators included), with Modbus UDP support
Ultra-fast data update rate (100 ms) — Instantaneous inverter response in ESS and Zero Feed-in systems
Real-time energy flow visualization via the Victron VRM portal
Simple Plug & Play connection with automatic detection by GX devices
Flexible energy calculation method settings (vector, arithmetic, or absolute)

Technical Specifications

Part number: REL200300100
Network type: 3-phase / 4-wire (L1, L2, L3, N); supports single-phase configurations
Voltage range: 85–265 V AC (phase L-N) / 150–460 V AC (line L-L), 50/60 Hz
Maximum current: up to 75 A per phase
Current transformers: 3 split-core sensors (10 mm inner diameter, 640 mm cable length) — included in the package
Communication interfaces:
- 1x Ethernet port (RJ45, Modbus UDP)
- 2x VE.Can ports (RJ45, VE.Can terminators included)
Data update rate: 100 ms
Device power supply: self-powered via L1-N phase (consumption 1.45 W / 3.1 VA)
Mounting: DIN-rail (standard modular housing, IP20)
Dimensions and weight: 90 x 71 x 59 mm, 370 g (including packaging)
Measured parameters:
- Active power (W) per phase and total
- Current (A) per phase and neutral wire
- Phase voltage (L-N) and line voltage (L-L)
- Grid frequency (Hz)
- Power factor (IEEE standard)
- Reactive and apparent power (var, VA)
- Phase sequence monitoring and phase error warning
- Total consumed and generated energy (kWh)

Use cases

Grid connection point measurement (Grid Meter) for residential and commercial ESS systems
Dynamic grid export limitation
(Zero Feed-in) or Net Billing operation
Metering of solar generation from PV inverters
Monitoring of output power from three-phase AC generators (AC Genset)
Monitoring of specific dedicated loads or sub-networks (AC Load)
Full control and energy consumption history review via the free VRM Portal cloud service

Communication and monitoring interfaces

Ethernet (RJ45) – direct connection to the local network; data transmission via Modbus UDP protocol
VE.Can (RJ45) – direct communication via industrial CAN-bus with Cerbo GX and Ekrano GX devices
VictronConnect – quick configuration of the meter role (Grid, PV Inverter, Genset, AC Load) and network settings via smartphone or PC
VRM Portal – visualization of power balance graphs, analytics, and remote access from anywhere in the world

Service support in Ukraine

Total-Energo LLC is a certified Victron Energy partner in Ukraine and provides comprehensive support:

System design
Equipment selection and supply
Installation and commissioning
VRM connection
Post-warranty service

Are current transformers included with the VM-3P75CT?

– Yes, the meter is ready to use right out of the box. The package includes three 75 A split-core current transformers with 640 mm cables, as well as terminators for the VE.Can bus.

Is it necessary to cut or disconnect power cables to install the sensors?

– No, the transformers feature a split-core (snap-on) design. They simply open up, clip around the cable for each phase, and snap shut. This significantly speeds up and simplifies installation without requiring the system to be powered down.

What are the maximum current and power ratings the meter can measure?

– The device measures current up to 75 A per phase. In a 230/400 V three-phase system, this corresponds to a total power of approximately 50 kW (up to 17 kW per phase).

How does the meter connect to a Cerbo GX or other Victron devices?

– The meter features two types of interfaces: Ethernet (standard twisted-pair network cable) and VE.Can (two RJ45 ports, CAN-bus).

Both versions transmit data with a high refresh rate (100 ms) and are automatically recognized by the Venus OS system.

What is the purpose of this meter in solar power plants and ESS systems?

– The meter is installed at the home's grid entry point as a Grid Meter. It tracks how much energy is consumed from the grid or fed back into it. This is essential for the proper operation of the ESS mode (blending solar and battery power) and for activating the Zero Feed-in function (preventing export to the grid).

Is the meter suitable for official billing by the utility company (commercial metering)?

– No, this device is intended for technical metering, internal monitoring, and controlling Victron Energy equipment. It does not replace the utility-approved, sealed commercial meter.

Can the VM-3P75CT be used in a single-phase system?

– Yes, the meter is versatile. It can be connected to standard three-phase grids as well as single-phase or split-phase configurations.

Is a separate power supply required to operate the meter?

– No, the meter is powered directly from the measured phase (L1) and neutral (N) (voltage range: 85 to 265 V AC). The device's power consumption is minimal – ...a total of approximately 1.45 W.

What electrical grid parameters does the meter display?

– The device measures voltage and current for each phase and the neutral wire; active, reactive, and apparent power; power factor (cos φ); frequency; and phase sequence correctness. It also accurately tracks consumed and generated energy (kWh).

Can data be transmitted directly from the meter to Home Assistant or SCADA?

– Yes, via its built-in Ethernet port, the device supports the open Modbus UDP protocol, allowing third-party controllers and automation servers to directly poll its internal registers.

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Features

Number of phases	Monophase, Three-phase
Metering type	Technical
Connection type	Transformer
Installation type	Modular, Universal
Nominal current, A	75.0
Interface type	Ethernet, CAN
Warranty period, mo	60

	Quantity	Total

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