The LPM/C Digital Phase and Load Monitoring Relay, developed by Borna Electronics, combines the functionality of a Digital Phase Monitoring Relay and a Digital Load Monitoring Relay in a single compact device. Designed with advanced digital technology and a space-saving three-module form factor, the relay provides comprehensive protection against both voltage-related and current-related faults in three-phase systems.
The LPM/C protects equipment against overvoltage, undervoltage, phase sequence reversal, voltage imbalance, phase loss, neutral loss, overcurrent, undercurrent, and current imbalance conditions. A separate current sensing module simplifies installation, while the built-in display and nine LED indicators provide clear operating and diagnostic information.
Features
- Combines Digital Phase Monitoring and Digital Load Monitoring functions in a single device
- Three-phase voltage protection against overvoltage, undervoltage, phase sequence reversal, voltage imbalance, and phase or neutral loss
- Three-phase current protection against overcurrent, undercurrent, and current imbalance
- Display of current, voltage, protection settings, and fault messages
- Selectable phase sequence fault enable/disable function
- Configurable manual or automatic reset modes
- Configurable output logic for contactor or shunt-trip circuit breaker applications
- Fault event counter display
- Operating time counter display based on load current flow
- Nine LED indicators for operating status and fault diagnostics
Technical Specifications
| Parameter | Specification |
| Supply Voltage | 380 VAC, 4-wire system, ±20% |
| Network Frequency | 50 Hz ±5% |
| Internal Power Consumption | Approx. 3 W |
| Current Range | 0.5 to 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 and Flush Mounted according to IEC 60715 |
| Output Relay | One C/O (SPDT) contact, 6 A |
Applications
- Three-phase motor protection
- Industrial control panels
- Pumps and compressors
- Industrial machinery
- Power distribution systems
- Applications requiring combined voltage and current protection
The LPM/C Digital Phase and Load Monitoring Relay delivers complete electrical protection in a single device, reducing panel space requirements while providing advanced monitoring, fault diagnostics, and enhanced system reliability.