3 Phase Multifunction Meter- 96×96 mm I Display of V-LL & LN, Amp, frequency, Kw, Kwh, Kva, Kvah, Kvarh, PF I True RMS I Higher measurement accuracies I 12 Months Warranty

Description

What is 3 Phase Multifunction Meter (MFM)?

An 3 phase MFM (Multifunction Meter) is a digital device that measures and monitors multiple electrical parameters in an electrical installation, such as voltage, current, power (active, reactive, apparent), power factor, and energy. It works by sampling real-time voltage and current signals, processing them with a microcontroller, and displaying the data or transmitting it as digital signals. Pyro MFMs are used in industrial, commercial, and domestic settings to simplify electrical monitoring by replacing separate meters like voltmeters, ammeters, and wattmeter.

Key details and features:-

• • Parameter measurement: Can measure over 30 vital parameters, including voltage, current, frequency, active and reactive power, apparent power, power factor, and phase angle.
  • Energy metering: Provides accurate measurements for active energy, including import/export energy and Max/Min power demand.
  • Power quality analysis: Offers features like total harmonic distortion (%THD) up to the 31st level.

• System compatibility: Compatible with various electrical systems, including 1-phase 2-wire, 3-phase 3-wire, and 3-phase 4-wire configurations.

• Communication: Many models include communication protocols like RS485 and MODBUS RTU for data transmission to a central system or for analysis.

Working principle of a Multifunction Meter

Unlike popular belief, the working principle of a multifunction meter is very different from that of a traditional induction meter.

A multifunction meter is much more ‘intelligent’ in comparison. It samples user power supply voltage and current in real-time and then uses a special electronic circuit including a microcontroller to process the sampled voltage and current signals.

This is then converted into electrical energy. The pulse output (when provided) is proportional to the final processed signals (kWh units).

How does a Multifunction Meter work?

In order to properly function, a multifunction meter has many electrical components, each serving a different purpose:

Sensors

Potential and current transformers are commonly used to measure voltage and electric current.

The current transformer (CT) has a primary winding with usually a single turn (or wire/cable) passing through a ferromagnetic core (of soft iron).

Based on Faraday’s law of induction, the current flowing through the cable will create a magnetic field which is then detected in the secondary winding of the ring core.

This way, there is no need to open the power circuit in order to measure the current.