The MM3-4A Three-Phase Digital Multimeter, developed by Borna Electronics, is designed for accurate measurement and display of voltage, current, and frequency in three-phase electrical systems. The device features three dedicated current displays and one configurable display for voltage or frequency measurement, providing comprehensive monitoring of electrical network parameters.
One of the key advantages of the MM3-4A is True RMS measurement for both voltage and current, ensuring accurate readings even in networks with distorted waveforms and harmonic content. The device is suitable for industrial power distribution systems, electrical panels, and energy monitoring applications.
Features
- Simple and user-friendly menu structure
- High measurement accuracy
- Phase voltage measurement from 100 to 270 VAC
- Line voltage measurement from 170 to 470 VAC
- Frequency measurement from 45 to 55 Hz
- Selectable CT ratio from 5/5 to 8000/5
- True RMS voltage measurement
- True RMS current measurement
- Four digital displays:
- Three independent displays for line currents
- One display for line voltage, phase voltage, or frequency
Technical Specifications
| Parameter | Specification |
| Input Voltage | 380 VAC, 4-wire system, ±20% |
| Network Frequency | 50 Hz ±5% |
| Voltage Measurement Range | 100–270 VAC (Phase), 170–470 VAC (Line) |
| Adjustable CT Ratio | From 5/5 to 8000/5 |
| Current Input Range | 40 mA to 5 AAC |
| Protection Degree | IP20 according to IEC 60529 |
| Operating Temperature | -10°C to +60°C |
| Relative Humidity | 15% to 85% |
| Mounting Method | Flush Mounted |