Get ready for your power system interview with this comprehensive guide of top power system interview questions and sample answers. Master your interview preparation now! Power Transformer
Only 5% of the faults are of the Permanent nature, rest are transient faults and so auto reclosing EHV Transmission Lines has become a generally accepted practice in Power System. What is Auto-reclosing in EHV Lines ? Ans: Auto-reclose is automatically reclosing a Circuit Breaker in a set time after it has been opened due…
Power System, mainly includes following things: Basic Components of a Power Transmission System are as follows: Basic Components of a Substation are as follows:
All Electric Insulations are dielectric in Nature and have a Capacitive Property. During application of Voltage across the Electrical Insulation, initially there will be a charging current After few instants, the Insulation becomes totally charged and the Capacitive Chrging Current becomes zero. Hence, it is recommended tp measure insulation resistance after 1 Minute from instant…
What are different types of Insulations used in Transformer? There are two types of Insulations used in Transformers: 1) Oil 2) Solid Insulation What are the Functions of Transformer Oil ? Transformer Oil has mainly three Functions: 1) Insulation 2) Cooling 3) Also, there is contamination caused by Chemical Interactions with Windings and other…
First of all we will find out what is polarity and then we will see why it is so important in CT. What is Polarity ? It is the Polarity of Voltage present between High Voltage Terminal and the Low Voltage Terminal. It can also be referred as, the direction of the current flow.In the…
TNC Switch is used in the RP/CP (Remote TNC Switch) and in the Breaker (Local TNC Switch) for Tripping and Closing the Breaker Manually. What is a TNC Switch? It is a Three Position Switch, used for Closing or tripping the Breaker Manually from Control Panel/Relay Panel in the Control Room. The Three Positions are…
Bucholz Relay provides Mechanical Protection for Transformer. What is a Buchholz Relay? What is the Working Principle of Buchholz Relay? 1.Accumulation Of Gases: Whenever a fault occurs inside the transformer, such as Arcing, Partial Discharge, Insulation failure of turns, breakdown of core or excess core heating, the fault is accompanied by production of excess heat….
[We keep wondering what the heck this sequence on the name plate of the Circuit Breakaer. Lets find it out now. What is the Duty Cycle/ Operating Sequence of CB? It is the Mechanical Duty requirement to be fulfilled by the Operating Mechanism of the Breaker and specified on the Name Plate of the Breaker…
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