The MMP Phase and Load Monitoring Relay, developed by Borna Electronics, is a comprehensive protection solution for three-phase electrical systems and motors. The relay combines phase monitoring and load monitoring functions in a single device, providing protection against both voltage-related and current-related faults.
The MMP relay continuously monitors phase sequence, phase loss, neutral loss, overvoltage, undervoltage, voltage imbalance, and overcurrent conditions. With six status indicators and multiple adjustable protection parameters, it offers reliable and flexible protection for motors, pumps, compressors, and other three-phase equipment.
Features
- Detection of phase sequence reversal
- Overvoltage and undervoltage protection
- Detection of phase loss
- Detection of neutral loss
- Adjustable three-phase voltage imbalance threshold
- Adjustable current setting
- Adjustable trip delay
- Selectable automatic reset and latching operating modes
- Six LED indicators for output status, phase sequence fault, overvoltage, undervoltage, voltage imbalance, and overcurrent conditions
Technical Specifications
| Parameter | Specification |
| Network Voltage | 380 VAC, 3-Phase, 4-Wire System, ±15% |
| Network Frequency | 50 Hz ±5% |
| Internal Power Consumption | Approx. 3 W |
| Current Ranges | 1–5 A, 4–16 A, 12–30 A, and 24–60 A |
| Protection Degree | IP20 according to IEC 60529 |
| Operating Temperature | -20°C to +60°C |
| Relative Humidity | 15% to 85% |
| Mounting Method | DIN Rail according to IEC 60715 |
| Insulation Class | Class II |
| Output Relay | One C/O (SPDT) contact, 6 A |
Applications
- Three-phase motor protection
- Industrial control panels
- Pumps and compressors
- Industrial machinery
- Conveyor systems
- Applications requiring combined voltage and current protection
The MMP Phase and Load Monitoring Relay combines advanced phase protection and load monitoring functions in a single device, reducing installation complexity while providing comprehensive protection against electrical faults and overload conditions.