Power Semiconductor Devices Interview Questions and Answers: 1. Give the broad classification of power semiconductor devices. Ans. Power semiconductor devices can be broadly classified into three categories viz. power diodes, thyristors…
Comparators in Power System Articles: Coincidence Type Phase Comparator : The basic concept of phase comparison is simpler in that it is possible to deal with signals of equal strength…
Apparatus Protection in Power System Articles: Bus Zone Protection : Bus Zone Protection includes, besides the bus itself the apparatus such as circuit breakers, disconnecting switches, Apparatus Protection in Power…
Overcurrent Protection Relay in Power System: The technique of Overcurrent Protection Relay in Power System is still widely used as a means of detecting faults on distribution system and on…
Phase Comparator Circuit: Phase Comparator Circuit technique is the most widely used for all practical directional, distance, differential and carrier relays. If the two input signals are S1 and S2…
Zero Crossing Detector Circuit: Zero Crossing Detector Circuit basically involves the sine to square wave conversion by a level detector circuit followed by a pulse circuit, which consists of one…
Transductor Relay (Magnetic Amplifier Relay): Transductor Relay - Since relays now have to perform much more complicated functions, many types tend to become very complex mechanically, and hence costly, to…
Percentage Biased Differential Relay: Percentage Biased Differential Relay - In order to avoid undesirable operation on heavy external faults due to CT errors and ratio change as a result of…