Tag Archives: Power Transformers

What are Numerical Protection Relays?

Numerical protection relays protect power transformers and distribution systems from various types of faults. For power transformers, these faults include protection from distance, line differential, pilot wire, low-impedance busbar, high-impedance differential, frequency, voltage, failure of circuit breaker, auto reclosing, and synchronism faults. For power distribution systems, these faults include protection from overcurrent, under or overvoltage, directional overcurrent’s, and feeder manager Read more [...]