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…
Protection of Alternators: The generating units, especially the larger ones, are relatively few in number and higher in individual cost than most other equipment's. Therefore, it is desirable and necessary…
Induction Type Directional Overcurrent Relay: The directional power relay is unsuitable for use as a directional protective relay under short-circuit conditions. When a short-circuit occurs, the system voltage falls to…
Relay Timing Circuit: An important characteristic of a relay is its time of operation. By the Relay Timing Circuit of operation is meant length of the time from the instant…
Circuit Breaker Ratings: A Circuit Breaker Ratings may be called upon to operate under all conditions. However, major duties are imposed on the Circuit Breaker Ratings when there is a…
Sulphur Hexafluoride Circuit Breaker: In Sulphur Hexafluoride Circuit Breaker (SF6) gas is used as the arc quenching medium. The SF6 is an electro-negative gas and has a strong tendency to…
Voltage Control by Synchronous Condenser: The voltage at the receiving end of a transmission line can be controlled by installing specially designed synchronous motors called synchronous condensers at the receiving…
Three Phase Unbalanced Load: The 3-phase loads that have the same impedance and power factor in each phase are called balanced loads. The problems on balanced loads can be solved…