Testing and Maintenance of Protective Gear Articles: Classification of Relay Testing : Classification of Relay Testing are usually conducted to demonstrate that: the relay will operate correctly to clear a…
Bus Zone Protection: Bus Zone Protection includes, besides the bus itself the apparatus such as circuit breakers, disconnecting switches, instrument transformers and bus sectionalizing reactors, etc. Although bus zone faults…
Transformer Feeder Protection: Transformer Feeder Protection - In order to supply bulk power from a major switching station, the transformer is sometimes connected directly to the feeder without an HV…
Relay Classification in Power System Protection: There are various types of Relay Classification in Power System Protection. Normally the actuating quantity is an electrical signal, although sometimes the actuating quantity…
Protection of Transformers: Transformers are static devices, totally enclosed and generally oil immersed. Therefore, chances of faults occurring on them are very rare. However, the consequences of even a rare…
Differential Protection of Alternators: The most common system used for the protection of stator winding faults employs circulating-current principle (Refer back to Art. 21.18). In this scheme of Differential Protection…
Generator Transformer Protection: Generator Transformer Protection - Protective relays, being component parts of electrical switchgear, should be closely associated with the control section of such systems, e.g. indicating and signalling systems. Thus the signalling and indicating systems…
Basic Ideas of Protection Relay: Basic Ideas of Protection Relay should ensure the availability of electrical energy without interruption to every load connected to the system. When the electric power…