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  • New item   Modular three-phase energy meter | 80 A | 3×230/400 V | 1 tariff | S0 pulse output | MID | DIN | Orno OR-WE-520

    Modular three-phase energy meter | 80 A | 3×230/400 V | 1 tariff | S0 pulse output | MID | DIN | Orno OR-WE-520

    Code: OR-WE-520
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    A straightforward direct-connected three-phase meter for 3×230/400 V networks up to 80 A, MID certified, accuracy class B. It shows consumed active energy and has an S0 pulse output (800 imp/kWh) – suited to sub-metering and billing without a data link.

  • Product description

    Modular three-phase energy meter | 80 A | 3×230/400 V | 1 tariff | S0 pulse output | MID | DIN | Orno OR-WE-520

    The Orno OR-WE-520 is a modular three-phase energy meter for direct connection to 3-phase 4-wire 3×230/400 V networks up to 80 A. It is intended for sub-metering and tenant metering where an on-screen consumption reading and a pulse signal are enough.

    Key point:
    The meter complies with MID (2014/32/EU) and accuracy class B to EN 50470-3, so its readings are valid for billing. There are no tariffs or data interface – it is a simple, clear device with nothing to configure. If automatic reading is needed later, the S0 output connects to a pulse counter or controller.
    Max. current
    80 A
    Network
    3×230/400 V
    Certification
    MID, class B
    Pulses
    800 imp/kWh
    ℹ
    Bidirectional metering
    The manufacturer does not state separate exported energy metering for this model – the display shows total active energy. If import and export must be seen separately, choose the Orno OR-WE-517.

    Communication interfaces and integration

    S0 pulse output
    Open-collector output 12–27 V DC, ≤27 mA, pulse width 80 ms, 800 imp/kWh – connects to a PLC, pulse counter, data logger or a Home Assistant pulse input.
    RS485 / Modbus
    Not available – data is read on the display or via S0 pulses.

    Operating principle

    The meter mounts on a 35 mm DIN rail and connects directly into a 3P+N circuit – no current transformers are needed up to 80 A.

    It measures three-phase active energy and accumulates it in one register; each counted portion of energy is signalled by an LED and an S0 pulse.

    The result is consumed energy in kWh on the backlit LCD (6+2 digits), while S0 pulses can be passed to an automatic metering system.

    Why choose the Orno OR-WE-520?
    It delivers MID-grade metering for less than Modbus models: no configuration, no communication cabling, one clear reading. Suited where readings are taken by hand or a pulse signal is sufficient.

    Technical specifications

    Product type Modular three-phase energy meter
    Manufacturer / model Orno OR-WE-520
    Connection Direct, 3-phase 4-wire (3P+N)
    Voltage 3×230/400 V
    Frequency 50 Hz
    Base / max. current 5 A / 80 A
    Min. current 0.25 A
    Starting current 0.02 A
    Accuracy class B (EN 50470-3)
    MID Yes (2014/32/EU)
    Tariffs 1
    Measured values Three-phase active energy (kWh)
    Interfaces S0 pulse output
    Pulse constant 800 imp/kWh
    Pulse output Open collector, 12–27 V DC, ≤27 mA, 80 ms
    Display LCD 6+2 digits, backlit
    Own consumption ≤8 VA / ≤0.4 W
    Dimensions 76×100×65 mm
    Protection rating IP51
    Operating temperature −25…+55 °C
    Standards IEC 62052-11, IEC 62053-21, EN 50470-1, EN 50470-3

    Main functions

    • MID metering – readings valid for billing
    • Direct connection up to 80 A – no current transformers
    • S0 output 800 imp/kWh – for automatic pulse counting
    • Backlit LCD – readable in a darker panel
    • LED indication – shows the meter is counting
    • IP51 housing – protection against dust and dripping water

    How does it differ from similar models?

    Orno OR-WE-517 80 A MID too, but adds RS485 Modbus, 4 tariffs and import/export registers. The OR-WE-520 is the simpler, lower-cost option without a data link.
    THORGEON 01002 Simple 80 A meter without interfaces; the OR-WE-520 is MID certified.
    Ollo 3P-351 / ESTXM302 Simple 100 A models without interfaces – when more than 80 A is needed.
    Eastron SDM630-MT 100 A, 4 tariffs, Modbus, MID – when remote reading and network parameters are required.

    Where is it used?

    • Tenant and sub-user metering
    • Floor and zone sub-metering in buildings
    • Workshops and small production areas
    • Farm buildings and warehouses
    • Three-phase heat pump or boiler circuits
    • Construction sites and temporary distribution boards

    Use by need

    For building owners.
    An MID reading for billing a tenant without extra systems.
    For electricians.
    Simple 3P+N wiring, no configuration required.
    For automation engineers.
    S0 pulses straight into a PLC or data logger.

    Practical use

    If you let part of a warehouse to a company with a three-phase supply up to 80 A, the OR-WE-520 in the panel gives an MID reading for billing, and the S0 output can be wired to the building controller later if needed.

    Pros

    • MID certificate and class B
    • Simple – no configuration
    • S0 output for automation
    • Backlit LCD
    • IP51 housing
    • Low own consumption – ≤0.4 W

    Cons / limitations

    • No RS485 / Modbus – for remote reading choose the Orno OR-WE-517
    • Single tariff
    • Manufacturer does not state separate export metering – for separate import/export metering see the OR-WE-517
    • Max. 80 A – for higher currents see 100 A models (Eastron SDM630-MT)

    Safety and installation notes

    • Installation and wiring must be done by a qualified electrician with the supply isolated
    • Size cables and protection for the 80 A limit
    • Follow the phase and N wiring diagram in the manual
    • Do not load the S0 output above 27 mA and 27 V DC
    • Fit the terminal covers and seal them if required

    Quick selection guide

    80 A direct
    MID, class B
    S0 800 imp/kWh
    1 tariff, no Modbus
    Suitable when you need:
    • Simple MID metering
    • Manual on-site reading
    • A pulse signal for automation
    Check before use:
    • That the load does not exceed 80 A
    • That the network is 3×230/400 V with N
    • That 800 imp/kWh suits your system
    Important reminder: The meter only records energy – it does not replace circuit breakers, RCDs or surge protection and does not transmit data via Modbus.

    FAQ

    Is the OR-WE-520 MID certified?
    Yes, the manufacturer states compliance with MID directive 2014/32/EU.
    Does it have Modbus?
    No, only an S0 pulse output.
    What is the pulse constant?
    800 imp/kWh.
    Does it measure energy exported to the grid?
    The manufacturer does not state separate export metering, so we recommend the OR-WE-517 for that.
    Are current transformers needed?
    No, it connects directly up to 80 A.
    How many tariffs?
    One.

    Orno OR-WE-520 – simple three-phase MID meter

    The Orno OR-WE-520 is a direct-connected 80 A three-phase meter with MID, class B and an S0 output of 800 imp/kWh for simple, accurate metering.

    Illustrative image may have been created using AI. The appearance of the product may differ slightly from the image shown. Please refer to the technical specification.

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