VM-3P5A 3-Phase Energy Meter – REL200320100

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SKU: REL200320100

5 year warranty

New

VM-3P5A — REL200320100 — is a three-phase electricity meter designed for use with standard current transformers featuring a 5 A secondary winding; it measures AC consumption or generation with high precision. Engineered for seamless integration into the Victron Energy ecosystem, the meter connects to Cerbo GX, Ekrano GX, or Venus GX devices via high-speed Ethernet or VE.Can interfaces. It is suitable for Energy Storage Systems (ESS) of any capacity, monitoring energy consumption in residential and commercial settings, tracking solar generation from grid-tied inverters, or metering generator output.

Key benefits of the VM-3P5A energy meter

Compatibility with standard industrial current transformers (x/5 A) — enables measurement of currents of any magnitude (100 A, 200 A, 400 A, 600 A, 1000 A, and higher)
Ultra-fast data update rate (100 ms) — ensures an instant response from ESS systems and optimal performance of the Zero Feed-in function (grid export limitation)
Two communication interfaces to choose from: Ethernet (RJ45) and VE.Can (2x RJ45, terminators included), with support for the Modbus UDP protocol
Self-powered from all phases (N-L1-L2-L3) — The device continues to operate stably even if voltage is lost on one or two phases
Full compatibility with GX devices (Cerbo GX, Ekrano GX, etc.) and the VictronConnect app
Flexible choice of energy metering method (vector, arithmetic, or absolute) to meet local grid requirements
Enables the creation of an accurate real-time visual diagram of energy flows

Technical specifications

Part number: REL200320100
Grid: 3-phase / 4-wire (L1, L2, L3, N); also supports single-phase and split-phase systems
Input voltage range: 85–265 V AC (phase L-N) / 150–460 V AC (line L-L), 50/60 Hz
Current connection: via external current transformers with 5 A secondary winding (primary rating configured in VictronConnect)
Interface types:
- 1x Ethernet port (RJ45, Modbus UDP protocol)
- 2x VE.Can ports (RJ45, VE.Can terminators included)
Update rate: 100 ms
Power supply: powered directly from the grid (N-L1-L2-L3), power consumption 1.85 W / 3.5 VA
Mounting: DIN-rail (dimensions 90 x 71 x 59 mm), IP20 protection
Housing material: blue polycarbonate (RAL 5012), weight 260 g
Measured parameters:
- Phase voltage (L-N) and line voltage (L-L)
- Current per phase and neutral current
- Active power (W)
- Reactive and apparent power (var, VA)
- Power factor (IEEE standard)
- Grid frequency (Hz)
- Phase sequence and phase sequence error warning
- Total consumed and exported energy (kWh)

Use cases

Measuring consumption for high-current installations (over 75 A) in ESS systems
Measuring generation from large-scale solar power plants with three-phase grid-tied inverters (PV Inverters)
Commercial and industrial use in three-phase networks with loads reaching hundreds or thousands of amperes
Dynamic limitation of power export to the grid (Zero Feed-in / Net Billing)
Monitoring of three-phase diesel or gasoline generators (AC Genset)
Display of detailed power balance and analytics on the VRM Portal

Communication and monitoring interfaces

Ethernet (RJ45) – high-speed local network communication, direct support for the Modbus UDP protocol
VE.Can (RJ45) – reliable industrial CAN-bus for direct connection to Cerbo GX or Ekrano GX
VictronConnect – quick configuration of transformer primary current ratings and device roles (Grid, PV Inverter, Genset, AC Load), as well as parameter verification
VRM Portal – comprehensive visualization of energy flows, remote diagnostics, and consumption/generation history

Service support in Ukraine

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

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

Why does the name specify "5 A," and does this mean the meter is rated only for loads up to 5 Amperes?

– No, the "5 A" designation refers to the secondary winding rating of the current transformers (CTs). This allows the meter to measure virtually any high current—100 A, 250 A, 600 A, 1000 A, or more—depending on the rating of the connected current transformers (e.g., 400/5 A or 1000/5 A).

Are current transformers included with the VM-3P5A?

– No, current transformers are purchased separately. This is intentional, allowing you to select transformers with the specific ratings and form factors (split-core or solid-core, for busbars or cables of the appropriate cross-section) required for your specific installation.

How does the VM-3P5A differ from the VM-3P75CT model?

– The VM-3P75CT model comes equipped with small split-core sensors that have a strict limit of 75 A per phase.

The VM-3P5A model is a versatile industrial version compatible with any standard current transformers (CTs) featuring a 5A secondary output; it imposes no limits on the facility's maximum power capacity and is powered by all three phases (N-L1-L2-L3).

How does the meter connect to Victron Energy monitoring systems (Cerbo GX, Ekrano GX)?

– The meter features two high-speed interfaces: Ethernet (RJ45 port) and the VE.Can bus (two RJ45 ports; terminators included). Both options support a high data update rate (100 ms) to ensure an instantaneous response from the control system.

What is the role of this meter in Energy Storage Systems (ESS) and solar power plants?

– The VM-3P5A is installed at the grid entry point of a home or facility to serve as a Grid Meter. It measures real-time power flow, enabling inverters to instantly supplement power from batteries or limit grid export to zero (Zero Feed-in function).

How is the primary current rating of the transformers configured in the meter?

– Configuration takes just a few clicks via the VictronConnect app (on a smartphone or computer) by simply specifying the primary current rating of the installed transformers (e.g., 200 A, 400 A, 1000 A).

Can the meter operate in a single-phase system?

– Yes, the device is versatile: it supports single-phase, split-phase, and full three-phase connection configurations.

What happens to the meter if voltage is lost on one or two phases?

– The VM-3P5A meter is powered by all phases (N-L1-L2-L3). Even if voltage is completely lost on one or two phases, it will continue to operate and transmit data to the GX device as long as at least one phase remains powered.

Which electrical grid parameters does the device monitor?

– The meter measures phase and line voltages, phase and neutral currents, active, reactive, and apparent power, power factor (cos φ), grid frequency, and phase sequence with high precision; it also tracks imported and exported energy (kWh).

Does the meter support data transmission to third-party automation systems (SCADA, Home Assistant, etc.)?

– Yes, via its built-in Ethernet port, the meter supports the Modbus UDP protocol, allowing third-party monitoring or smart home systems to directly poll data registers.

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€194

Features

Number of phases	Monophase, Three-phase
Metering type	Technical
Connection type	Transformer
Installation type	Modular, Universal
Nominal current, A	5.0
Interface type	Ethernet, CAN
Warranty period, mo	60

	Quantity	Total

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