LE-03MW-4Q4T-CT

• MID certificate,

• 3-phase electricity meter,

• semi-direct measurement using current transformers,

• high measurement accuracy – Class C (0.5%),

• bidirectional, 4-quadrant energy measurement,

• energy measurement broken down by tariff zones,

• measurement of inductive and capacitive reactive energy,

• measurement of network parameters,

• remote reading – RS385 communication interface, Modbus RTU protocol

• backlit LCD display,

• auxiliary energy meter with RESET function,

• 5-year warranty

Compliance
MID Directive 2014/32/EU
Certificate No. 0598/MID/B/26/060

The LE-03MW-4Q4T-CT electricity meter at a glance:

The LE-03MW-4Q4T-CT is an advanced, three-phase electricity meter, enabling semi-direct (using current transformers) bidirectional measurement of active energy (drawn from and fed into the grid) and full four-quadrant measurement of reactive energy (inductive and capacitive). High measurement accuracy (0.5%) ensures reliable and accurate billing of energy consumption.

The meter is MID-certified, making it suitable for use as a meter for billing energy consumption.

The LE-03MW-4Q4T-CT enables energy consumption billing to be broken down into tariff zones (up to four tariffs). The schedule allows for the independent division of the day into tariff periods for working days, weekends and scheduled public holidays.

The meter is equipped with an RS485 communication port supporting the Modbus RTU protocol, enabling remote meter reading and integration with external data logging systems, e.g. Meternet or Fox.

In addition, the meter is fitted with a standard pulse output signalling an increase in active energy consumption.

Key features of the LE-03MW-4Q4T-CT meter

• semi-direct measurement using 5A current transformers;

• operation in three-phase 3- and 4-wire configurations

• bidirectional active energy measurement (energy consumed and supplied),

• 4-quadrant reactive energymeasurement (inductive and capacitive energy),

• high measurement accuracy – Class C (0.5%),

• energy recording across four tariff zones;

  • battery-backed real-time clock (RTC) – no need to connect an external clock for tariff switching,

  • up to eight time slots in the daily schedule;

  • separate schedules for working days, weekends and public holidays;

  • option to define up to 100 public holidays;

• advanced measurement capabilities:

  • voltage, current, power, frequency, power and current demand,

  • detailed information on energy consumption and network parameters – including a breakdown by individual phases,

• RS-485 communication with Modbus RTU protocol support,

• pulse output to signal an increase in active energy consumption,

• additional auxiliary meter with REST function,

• PIN code protection for settings,

• backlit, multifunctional LCD display,

• MID certification,

• DIN rail mounting,

• 5-year warranty.

Key technical specifications

• measurement system: three-phase, 3- and 4-wire,

• rated voltage: 3 × 230/400 V AC,

• measurement type: semi-direct (using current transformers),

• suitable for connection to standard 5A current transformers with a maximum ratio of 1000:10

• bidirectional active energy measurement (energy consumed and supplied),

• 4-quadrant reactive energy measurement (inductive and capacitive energy),

• number of tariff zones: 4;

• clock: RTC with battery backup;

• communication: RS-485;

• protocol: Modbus RTU;

• active energy measurement accuracy: Class C;

• compliance: MID;

• pulse output: 1 × SO;

• mounting: DIN rail;

• enclosure width: 4 modules, 71.5 mm.

Bidirectional active and reactive energy measurement

The LE-03MW-4Q4T-CT separately records energy drawn from the grid and energy fed back into the grid. Bidirectional measurement covers both active and reactive energy.

This allows the meter to be used in installations where the direction of energy flow may vary, including systems integrated with a photovoltaic installation or energy storage facility. The device can also function as a sub-meter for a separate part of an installation, a premises, a circuit or a three-phase load.

Four-quadrant reactive energy measurement

The meter records inductive and capacitive reactive energy, taking into account the direction of its flow. The values are recorded in four quadrants: Q1–Q4.

This measurement range complements the information on active energy consumed and supplied, and provides a more comprehensive picture of energy flows within the installation. The LE-03MW-4Q4T-CT also measures reactive power, apparent power and power factor.

The device is designed for measuring and recording data. It does not provide reactive energy compensation and does not replace a controller or actuator intended for such compensation.

Four tariff zones and an RTC clock

The most important feature distinguishing the LE-03MW-4Q4T-CT is its ability to record energy consumption across four tariff zones. An integrated real-time clock (RTC) is responsible for automatically switching between these zones.

The clock is battery-backed, so it maintains the correct time even during a power cut. The day can be divided into a maximum of eight time slots assigned to the relevant tariffs.

Separate schedules may apply on weekdays, at weekends and on defined public holidays. The device’s memory can store up to 100 public holidays. This allows the sub-meter to allocate energy to the relevant zones without the need for an external tariff clock.

Metering of network parameters

In addition to active and reactive energy, the meter measures phase and inter-phase voltages, currents in individual phases, frequency, active, reactive and apparent power, and the power factor.

The LE-03MW-4Q4T-CT also calculates active and reactive power demand, including separately for each phase. Data can be read locally on the LCD display or digitally via Modbus RTU.

Remote reading via Modbus RTU

The RS-485 port enables the meter to be connected to a compatible communication bus. The Modbus RTU protocol allows a master system to read energy registers and current network parameters.

The LE-03MW-4Q4T can therefore operate as a sub-meter with remote reading in compatible monitoring, data logging, automation, BMS or SCADA systems. Integration requires support for the Modbus RTU protocol and the device’s register map.

Auxiliary counter and pulse output

The device features an additional auxiliary counter with a REST function. This allows a separate measurement to be started from a selected point in time without altering the main energy registers.

The open-collector SO pulse output can be used with devices equipped with inputs designed for pulse counting.

MID certificate

The LE-03MW-4Q4T-CT holds MID certification confirming compliance with the requirements for measuring instruments. This enables it to function as a sub-meter in systems where the use of an MID-compliant device is required, including for the billing of energy consumption costs.

Measured values: