in short circuit. test of a transformer 5 to 10% ofvrated voltage is used why??? if we use rated voltafe then what will be?

1 Answers  

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Recently we had experienced following problem All RCCB breakers (connected to the load as well as spares) connected to various UPS systems at various floors at a high rise building tripped during a power break down and upon starting up of generator.This Generator is recently inducted into the installation. Can any one explain the reason behind this tripping. Regards Viswanathan

1 Answers  

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in the Distribution system .which one is Most Economically used by Power Engineer ? a)3 Phase3 wire System or b) 3Phase -4wire System

6 Answers   APTransco,

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What is Class and accuracy in CTs? Types of Classes and important of Classes?

2 Answers  

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why two point starter,three point starter, four point starter cannot be used for A.C machines?

2 Answers  

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what will happen when the dc supply is given to the capacitor?

0 Answers  

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how to get electrical supervisour certificate in gujarat

0 Answers  

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plzzzzzzzzz plzz send me the papers of JSPL WRITTEN TEST..SO that i can prepare for the test in electrical engg..

0 Answers  

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What is the normal earth resistance?

11 Answers  

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why crgo core is used in transformers?

6 Answers   Bhel, TATA,

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How Humming noise generated in starter motor which was used the start the engine in a vehicle/car/Truck?.Moreover Starter motor was operated in DC power supply. Can you guys clarify ?

2 Answers  

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how do you select the ct/pt rating in substation

1 Answers   Apollo, Shreem Electric Ltd, Tata Motors,

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