The SVR/D Digital Single-Phase Voltage Protection Relay, developed by Borna Electronics, is a compact two-module protection device designed to safeguard single-phase equipment against abnormal voltage conditions. The relay provides reliable protection against overvoltage, undervoltage, phase-loss conditions, and repetitive power interruptions that can damage electrical equipment and contactor coils.
Featuring adjustable reconnection delay and comprehensive LED status indication, the SVR/D offers enhanced reliability for industrial, commercial, and building electrical systems. Its compact DIN-rail design makes it particularly suitable for modern control panels where installation space is limited.
Features
- Protection of single-phase loads against overvoltage conditions
- Protection of single-phase loads against undervoltage conditions
- Protection against phase-loss conditions
- Protection against repetitive power interruption and restoration stresses
- Contactor coil protection against voltage-related faults
- Suitable for high-power loads when used with contactors
- Adjustable reconnection delay from 1 to 3 minutes
- One C/O (SPDT) output relay contact
- Four LED indicators for output status, timing operation, overvoltage, and undervoltage conditions
Technical Specifications
| Parameter | Specification |
| Supply Voltage | 170–260 VAC |
| Network Frequency | 50 Hz ±5% |
| Internal Power Consumption | Approx. 3 W |
| Voltage Fault Threshold | Below 175 VAC or above 255 VAC |
| 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
- Contactor coil protection
- Single-phase motors and loads
- Industrial control panels
- Commercial electrical installations
- Building electrical systems
- Protection of sensitive single-phase equipment
The SVR/D Digital Voltage Protection Relay provides dependable protection against abnormal voltage conditions while offering a compact installation footprint, helping improve equipment reliability and extend service life.