Numerical Relays provide highly reliable protection by monitoring phase (Overcurrent) and residual (Earth Fault) currents. As microprocessor-based draw-out units employ fast digital signal processing and advanced algorithms to quickly analyze fault magnitude and duration, ensuring that the circuit breaker isolates only the damaged section of the electrical system.
numrAL OCR11 is a single phase, non-directional, Over Current or Earth Fault Relay with one measuring element. This numerical relay can be used for feeder protection in all low-voltage, medium-voltage, and high-voltage sub-stations. User has a choice to select 6 trip characteristics.
numrAL FDR21 numerical relay offer 3 phase non-directional Over Current and Earth Fault protection for LV and MV power distribution systems. numrAL FDR21 is a numerical relay which is suitable for applications such as providing selective protection for overhead and underground feeders (up to 66 kV), AC machines, back up protection for transformers etc. With a microcontroller-based draw-out design and an intelligent Algorithm, numrAL FDR21 offers comprehensive Feeder Protection and Monitoring with Fundamental and True RMS measurement
numrAL FDR22 numerical relay offer 3 phase non-directional Over Current and Earth Fault protection for LV and MV power distribution systems. numrAL FDR22 is a numerical relay which is suitable for applications such as providing selective protection for overhead and underground feeders (up to 66 kV), AC machines, back up protection for transformers etc. With a microcontroller-based draw-out design and an intelligent Algorithm, numrAL FDR22 offers comprehensive Feeder Protection and Monitoring with Fundamental and True RMS measurement
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