Study and Analysis of Modern Numerical Relay Compared to Electromechanical Relay for Transmission of Power

  IJETT-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
© 2017 by IJETT Journal
Volume-47 Number-9
Year of Publication : 2017
Authors : Sandeep S R, Megha N, Pavithra V, Suma C Biradar, Thanushree V
DOI :  10.14445/22315381/IJETT-V47P284


Sandeep S R, Megha N, Pavithra V, Suma C Biradar, Thanushree V "Study and Analysis of Modern Numerical Relay Compared to Electromechanical Relay for Transmission of Power", International Journal of Engineering Trends and Technology (IJETT), V47(9),509-515 May 2017. ISSN:2231-5381. published by seventh sense research group

Protection is one of the most important aspect to be considered in power systems. In this concept relays play a major role. Relay is a device which senses an electrical quantity either to trip the source of fault or to alert the operating staff to take protective step in time to even further damage. The main functions of protective relays are to sound an alarm or to close the trip circuit, to isolate or disconnect faulted circuits or equipment to localize the effect of fault to improve system stability, service continuity and minimize hazards to personnel. This project deals with the study of different relays and how the modern numerical relays are used to overcome the disadvantages of electromechanical relays. Here, a case study relating to both electromechanical relay and numerical relay will be done and the results are analyzed.


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Electromechanical relay, numerical relay, Local breaker backup, Bus bar protection, Goose feature in Numerical relay.