The ASN Phase Monitoring Relay, developed by Borna Electronics, is one of the most recognized and widely used phase protection relays in the Iranian electrical industry. The relay is designed to protect three-phase equipment and motors against common power network disturbances, including phase loss, neutral loss, phase sequence reversal, undervoltage conditions, and voltage imbalance.
The ASN relay features adjustable voltage imbalance settings and selectable reconnection delay after fault clearance, ensuring reliable operation and effective equipment protection. Dedicated LED indicators provide clear information about output status and fault conditions, enabling quick diagnosis and maintenance.
Features
- Protection of three-phase motors against power network disturbances
- Detection of phase sequence reversal
- Detection of phase loss and neutral loss
- Detection of three-phase voltage imbalance
- Undervoltage detection
- Fast trip response in fault conditions
- Selectable reconnection delay after fault clearance
- Adjustable voltage imbalance threshold
- Protection against repetitive power interruption and restoration shocks
- LED indicators for normal operation and fault diagnosis
Technical Specifications
| Parameter | Specification |
| Supply Voltage | 380 VAC, 4-wire system, +10% / -20% |
| Network Frequency | 50 Hz ±5% |
| Internal Power Consumption | Approx. 3 W |
| 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 |
| 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
- HVAC systems
- Power distribution systems
The ASN Phase Monitoring Relay provides dependable protection against common three-phase power supply faults, helping to prevent motor damage, reduce downtime, and improve the reliability of industrial electrical systems.