Testing of Circuit Breakers Articles: Circuit Breaker Tester Classification: Circuit Breaker Tester can be classified into two main groups, viz. (i) type tests and (ii) routine tests. Type Tests: These…
Apparatus Protection in Power System Articles: Transformer Protection Types: Nature of Transformer Faults: Power transformers, being static, totally enclosed and oil immersed develop faults only rarely but the consequences of…
Circuit Breaker Testing Procedure: A preliminary check up of various equipment is made before the actual Circuit Breaker Testing Procedure commences. The correct values of resistance and reactance coils are…
Simple Testing Station: In these Testing Station the short-circuit power is supplied by specially designed short-circuit generators, driven by induction motors. A simplified diagram of such a testing station is…
Hall Effect Relay Circuit: Hall Effect Relay Circuit is utilized to give a phase comparator. The effect is very predominant in certain semiconductors such as indium arsenide, indium antimonide, indium…
Motor Protection: Motor Protection - There is a wide range of motors in existence for various purposes. However, the fundamental problems affecting the choice of protection are independent of the…
Differential Relay Application: The principle of operation depends on a simple circulating current principle where the difference of the currents of the two CTs flows through the relay under normal…
Important Questions of Electrical Design of Overhead Lines: 1. What do you understand by the constants of an overhead transmission line ? 2. What is skin effect ? Why is…