WM3M4 & WM3M4C Three-phase electrical energy meters for charging stations User's Manual
■The WM3M4 & WM3M4C energy meters are MID certified meters, intended for energy measurements in the three-phase and single-phase electrical charger stations. The WM3M4C energy meter features high temperature operation and digital signing for a charging event, whereas WM3M4 features only high temperature operation. Both meters measure energy directly in 4-wire networks according to the principle of fast sampling of voltage and current signals. A built-in microprocessor calculates power, energy, current, voltage, power factor, power angle, frequency, harmonics of THD voltage and THD current harmonics. WM3M4C meter can detect and log events relevant for charging via RS485 communication. Thus the meter can produce relevant digital signature for charging event.
●Main features
■3 DIN modules width three-phase direct connected DIN-rail mounting meter.
■Class 1 for active energy according to EN 62053-21.
■MID approval WM3M4 & WM3M4C for class B according to EN 50470-3.
■PTB approval for EV charging stations (according to PTB-A 20.1. and PTB-A 50.7, valid only for WM3M4C).
■Reference frequency 50 Hz or 60 Hz.
■Maximum current (Imax) 40 A.
■Reference current 5 A (Iref).
■Reference voltage 3x230 V/400 V (Un).
■Voltage operating range (-20 % ... +15 %) Un.
■Two row display 6+2 digit (10 Wh resolution) with backlight.
■Multifunctional front LED.
■IR Serial communication.
■RS485 Serial communication.
■Measurement of
▲ Power (active/reactive/apparent for each phase and total).
▲Active energy (bidirectional).
▲ Voltage (each phase).
▲ Current (each phase).
▲ Phase to phase voltage.
▲ Phase to phase angle.
▲ Frequency.
▲ Power factor (each phase and total).
▲ Power angle (each phase and total).
▲ THD of voltage.
▲ THD of current.
■Crypto engine (Hash, signature) for generation of secure datasets (valid only for WM3M4C).
■Possibility to connect as a single phase (on L3).
■Remote control for backlight LCD.
■Secure data transfer (digital signature, valid only for WM3M4C).
■70°C ambient operation temperature.
■Sealable terminal cover.
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Three-phase electrical energy meters 、 energy meters 、 MID certified meters 、 energy meter 、 meters |
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[ charging stations ][ three-phase electrical charger stations ][ single-phase electrical charger stations ] |
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User's Guide |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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July 2023 |
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Version 1.14 |
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EN K22.433.922 |
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8.1 MB |
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