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…
Heavy Current Test Plant: Heavy Current Test Plant - Simulating the exact fault conditions as would occur in practice is a difficult and a tedious job. The plant for providing…
Auto Reclosing Scheme: Auto Reclosing Scheme - It is well realized that the transient faults which are most frequent in occurrence do no permanent damage to the system as they…
Prime Mover Protection: In the event of prime-mover failure the machine starts motoring meaning thereby that it draws electrical power from the system and drives the prime-mover. This condition imposes…
Generator Faults: Generator faults can be considered under the following heads. (a) Stator Faults: These include the following: Phase-to-earth faults. Phase-to-phase faults. Inter-turn faults. Most faults occur in the stator…
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…
Types of Electromagnetic Relays: There are two principal Types of Electromagnetic Relays: Attracted armature type; and Induction type. (a) Attracted Armature Type: This includes plunger, hinged armature, balanced beam and…
Important Questions of Protection of Alternators and Transformers: 1. Discuss the important faults on an alternator. 2. Explain with a neat diagram the application of Merz-Price circulating current principle for…