Restricted Earth Fault Relay

The application of powerful microprocessors DIGITAL MICROPROCESSOR BASED RESTRICTED EARTH FAULT RELAY (REFR) opens a new chapter for power system protective relaying. The digital processing of measured values and the ability to perform complex arithmetic and logic operations, give digital protection relays significant performance and flexibility improvements over their traditional analogue counterparts. Additional advantages - very small power consumption, adaptability, self-supervision, smaller physical construction and selectable relay characteristics - all combine to allow the implementation of accurate and highly reliable protection schemes at a significantly reduced financial burden.

The development of microprocessor based DIGITAL MICROPROCESSOR BASED RESTRICTED EARTH FAULT RELAY (REFR) protective relays and their introduction into the market has been stimulated by the recent trend to replace analogue with digital equipment. The superiority of digital protective relaying over traditional analogue devices, as embodied by the DIGITAL MICROPROCESSOR BASED RESTRICTED EARTH FAULT RELAY (REFR)