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  • New item   3-phase energy meter via CT | x/1 A and x/5 A | 3×230/400 V | MID | 4 tariffs | 1 DI / 1 DO | Modbus RS-485 | DIN | Schneider Electric Acti9 iEM3255 | A9MEM3255

    3-phase energy meter via CT | x/1 A and x/5 A | 3×230/400 V | MID | 4 tariffs | 1 DI / 1 DO | Modbus RS-485 | DIN | Schneider Electric Acti9 iEM3255 | A9MEM3255

    Code: A9MEM3255
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    Price 246.59 € VAT incl.
    ( 203.79 € VAT excl. )
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    3-phase energy meter connected via current transformers x/1 A or x/5 A, Modbus RTU RS-485, active energy class 0.5S, MID, 4 tariffs, 1 DI / 1 DO.

  • Product description

    3-phase energy meter via CT | x/1 A and x/5 A | 3×230/400 V | MID | 4 tariffs | 1 DI / 1 DO | Modbus RS-485 | DIN | Schneider Electric Acti9 iEM3255 | A9MEM3255

    Schneider Electric Acti9 iEM3255 A9MEM3255 is a modular 3-phase energy meter connected via external current transformers x/1 A or x/5 A. It is designed for higher-current circuits where a direct meter cannot be used, with data transferred over Modbus RS-485.

    Key point:
    When billing metering with MID approval, four tariffs and a pulse output are needed, iEM3255 combines all of it in one 5-module housing. It measures active, reactive and apparent energy in both directions.
    Connection
    via CT x/1 A or x/5 A
    Accuracy
    cl. 0.5S (IEC 62053-22)
    Communication
    Modbus RTU RS-485
    MID
    Yes

    Operating principle

    The meter is mounted on a DIN rail. Current circuits are connected via external current transformers, voltage circuits directly or via voltage transformers.

    The CT ratio (primary current up to 32,767 A) and network type – 3P, 3P+N or 1P+N – are set in the meter.

    The device counts energy in 4 tariffs controlled by the internal clock, the input or communication, and the pulse output transmits energy pulses or an overload alarm.

    Why choose iEM3255?
    MID-approved metering for tenants or building zones, four tariffs and a full energy balance – import and export.

    Technical specifications

    Product type 3-phase energy meter via current transformers
    Manufacturer / code Schneider Electric / A9MEM3255
    Model Acti9 iEM3255
    Current input via CT x/1 A or x/5 A
    CT primary current 1…32,767 A
    Voltage 100…277 V L-N / 173…480 V L-L, 50/60 Hz
    Voltage transformers supported
    Network types 3P, 3P+N, 1P+N
    Measured values active, reactive and apparent energy (4 quadrants, import / export), power, current, voltage
    Accuracy class active energy 0.5S (IEC 62053-22), class C (EN 50470-3)
    MID Yes (EN 50470-1, EN 50470-3)
    Tariffs 4
    Digital input 1 (11…40 V DC)
    Digital output 1, static 5…40 V DC, 50 mA – pulses or alarm
    Communication Modbus RTU, RS-485, 9.6 / 19.2 / 38.4 kbaud
    Display LCD
    Terminals current – 6 mm², voltage – 2.5 mm²
    Width 5 modules (90 mm)
    Dimensions 90 × 95 × 69 mm
    Protection IP40 front / IP20 housing
    Operating temperature −25…+55 °C (for MID use)
    Overvoltage category III
    Mounting 35 mm DIN rail

    Main functions

    • Connection via CT x/1 A and x/5 A – suits any incomer current.
    • Active energy class 0.5S – accurate consumption metering.
    • Modbus RTU RS-485 – data to SCADA, BMS or energy management.
    • MID approval – suitable for billing metering.
    • 4 tariffs – via clock, input or communication.
    • 1 DI / 1 DO – pulse counting, tariff control, pulse output or alarm.

    Where is it used?

    • Building and plant incomers with current transformers
    • Tenant and zone metering
    • PV generation and consumption metering
    • Energy monitoring of production lines
    • Energy management and BMS systems
    • Panel building and retrofit

    Use by need

    For the facility manager.
    MID metering allows fair cost allocation to tenants.
    For the automation / SCADA integrator.
    Modbus RTU registers make the meter quick to integrate.
    For the installing electrician.
    5-module DIN housing and clear CT ratio setting – easy installation.

    Practical use

    If a shopping centre needs MID-approved metering for each tenant with two tariffs, iEM3255 is connected via current transformers, the tariffs are controlled by the input or Modbus, and data is sent to the building management system.

    Pros

    • Connection via CT x/1 A and x/5 A
    • Accuracy class 0.5S
    • Modbus RTU RS-485
    • Compact – 5 modules
    • MID approved
    • 4 tariffs and DI/DO

    Cons / limitations

    • External current transformers required
    • More complex than basic meters – tariffs and I/O need configuring
    • No harmonic analysis – choose PM5110 for that

    Safety and installation notes

    • Switch off and verify absence of voltage before wiring.
    • Never open CT secondary circuits under load – use shorting terminals.
    • Observe CT direction (P1→P2) and phase matching with the voltage inputs.
    • Protect voltage circuits as specified by the manufacturer.
    • Installation must be done by a qualified electrician.

    Quick selection guide

    CT x/1 A, x/5 A
    3×230/400 V
    cl. 0.5S
    Modbus RS-485
    5 mod. DIN
    MID
    Suitable when you need:
    • Metering energy via current transformers
    • Transferring data over Modbus
    • MID billing metering with tariffs
    Check before use:
    • CT ratio and secondary current (1 A or 5 A)
    • Network type (3P / 3P+N / 1P+N)
    • Modbus address and baud rate
    Important reminder: The meter does not protect the line – it requires current transformers and protection of the voltage circuits.
    ☝ Elsprendimai.eu recommends:
    • ELEQ TQ50-L / TQ40 or Schneider PowerLogic HJ / HM current transformers
    • For harmonics and alarms – PM5110 power analyser

    FAQ

    Can it be connected directly?
    No – it connects only via current transformers x/1 A or x/5 A.
    Is it MID approved?
    Yes – per EN 50470-1 and EN 50470-3.
    What communication?
    Modbus RTU over RS-485.
    How many modules?
    5 modules (90 mm) on a DIN rail.
    Does it measure reactive energy?
    Yes – active, reactive and apparent.
    Can it be used with 1 A CTs?
    Yes – x/1 A and x/5 A transformers are supported.

    Documents

    3-phase energy meter via CT | x/1 A and x/5 A | 3×230/400 V | MID | 4 tariffs | 1 DI / 1 DO | Modbus RS-485 | DIN | Schneider Electric Acti9 iEM3255 | A9MEM3255

    Schneider Electric Acti9 iEM3255 A9MEM3255 – 3-phase CT meter x/1 A and x/5 A, class 0.5S, Modbus RS-485, MID, 4 tariffs, 1 DI / 1 DO.

    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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