Answer / aashish

Because a very high voltage is generated in the secondary due to large no of turns so if open circuited ct will get damage

Answer / raja

Understand CT is a voltage step up transformer.

HT side has higher voltage but low current.
LT side has lower voltage but high current.

So for CT of rating 500/1 Amps, 500 Amps side(Primary of CT) has very low voltage and 1 Amp side (Secondary of (CT)
has very high voltage(Insane value in KVs).
 
This high voltage is beyond the maximum impulse withstand voltage of the CT and it blasts the CT. Hence secondary is always short circuited.

Current and voltage are inversely proportional. 

Answer / vipin singhal

when secondary is open then in primary flows very large current which burn the winding of the core.

Answer / gautam

 if we open circuit the secondary terminal current across this terminal falls to zero. as VI is constant for a Xmer voltage across secondary side increase drasticly,which results electrical breakdown across secondary.

In synchronization circuit what is the function of Interposing voltage transformer(IVT)and Reverse voltage transformer(RVT)

0 Answers   ABB,

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i am BSEE student, my project study is to synchronize the generator of an hospital, it have a one 313KVA standby-power diesel gen.,and three 100kva transformer.The generator system is operated manually and no ATS or UPS. one more new building is being build so the transformer will be upgrade to a higher vale. 1)how i can connect the new gen. to the old gen. and to the synchronize panel? 2)what is the new gen. to be buy?(rating, etc.) These is my title: To synchronize the generator system of the ____ Hospital. Anyone have a good title? Thanks.

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I WOULD LIKE NOW WHY WE CANT USE SOME CT FOR MESARING AND PROTECTION

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why DC current not used in Transformer action?

17 Answers   Engineers India Limited,

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