A Numerical Relay is a digital protection device that uses microprocessors to perform protective functions in electrical systems. These relays provide improved accuracy, flexibility, and functionality compared to traditional electromechanical or static relays.
| Feature | Details |
|---|---|
| Operating Voltage | 24V DC, 48V DC, 110V AC, or 230V AC |
| Frequency Range | 50Hz or 60Hz |
| Communication Protocols | Supports RS-485, Modbus, IEC 61850, DNP3 |
| Protection Functions | Overcurrent, Earth Fault, Differential, Distance, etc. |
| Inputs/Outputs (I/O) | Multiple programmable I/O points for versatile configurations |
| Display Type | LCD, LED, or Touchscreen |
| Event Logging & Alarms | In-built memory for storing fault records and event logs |
| Self-Diagnostic Features | Monitors internal hardware health for enhanced reliability |
| Programmable Logic | Customizable logic for specific protection schemes |
| Compliance Standards | Meets IEC 60255, ANSI, and other industry standards |
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