3-phase bidirectional intermediate meter, semi-direct, Modbus RTU, 100(5)A. MID LE-03MQ-CT

LE-03MQ CT is a three-phase (also capable of operating in single-phase modes) electronic bidirectional energy meter with network parameter analysis. The device measures active and reactive energy (import/export), instantaneous values of voltages, currents, power, power factor, frequency, and THD distortion coefficients. It is equipped with an RS-485 communication port with Modbus RTU protocol and two pulse outputs (one configurable), supporting external current transformers of 1 A or 5 A.

Manufacturer: F&F Filipowski sp.j. (trade designation f&f). The company supplies the device marked with the symbol LE-03MQ-CT, manufactured in accordance with the MID directive 2004/22/EC (certificate 0120/SG S0216). The device has a durable, laser-engraved serial marking and is designed for mounting on a DIN rail.

Electrical and technical parameters

• Reference voltage range: 3×230/400 V (phase range L-N 100–289 V for 1P2W and 3P4W systems; L-L 173–500 V for 3P3W).
• Base current: 0.25–10 A; maximum direct current: 100 A; minimum measured current: 0.02 A; overload 30×Imax/10 ms.
• Support for current transformers CT with a secondary current of 1 A or 5 A and the ability to set the CT rate in the range of 0001–9999; CT and PT settings are secured - they can only be set once (MID requirement).
• Measurement and registration: active/reactive energy import/export 0–9 999 999.9; instantaneous active, reactive, and apparent powers up to 3600 MW/Mvar/MVA.
• Accuracy: measurement class according to specifications (active energy ±1% IEC 62053-21 and specified voltage/current/auxiliary measurement accuracies in the datasheet).
• Auxiliary power supply: 85–275 V AC (50/60 Hz) ±10% or 120–380 V DC ±20%; power consumption <10 VA (<2 W).
• Pulse outputs: OC (open collector) type 27 V DC / 50 mA; output 1 programmable (kWh or kVArh) with possible divisions 0.01 / 0.1 / 1 / 10 / 100 / 1000; output 2 fixed: 3200 imp./kWh.
• Pulse outputs: pulse width configurable for output 1: 60 / 100 / 200 ms; output 2 fixed 200 ms.
• Communication: RS-485 Modbus RTU; speeds: 2400 / 4800 / 9600 / 19200 / 38400 bps; network address 1–247; parity NONE/ODD/EVEN; 1 or 2 stop bits.
• Additional functions: THD measurement (voltages and currents), maximum demand measurement (MD), DIT (demand integration time) configurable 5/10/15/30/60 min, LCD backlighting with adjustable turn-off time.

Mechanical parameters and dimensions

• Mounting: on DIN rail.
• Housing material: self-extinguishing plastic UL94 V-0.
• Protection degree: IP51 (indoor).
• Dimensions: 94.5 mm (width) × 72 mm (depth) × 65 mm (height).
• Finish: terminal cover with sealing option, serial marking laser engraved.