what is diffrence between primary & secondry transformer?

3 Answers  

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What is the mmf,rgt and ngt please brief completely

0 Answers   cpgn,

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I have two power supply.a)govt. power b)Captive power.3 phase load connected inside factory.when source change govt. source to captive some motor rotate reverse. Is phase sequence changes when if off & on?If I off generator & on it again is it possible to get changed phase sequence??

4 Answers   ABB,

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I need tnpsc AE Electrical question papers

2 Answers   TNPSC Tamil Nadu Public Service Commission,

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what is the efficiency of thyristor

0 Answers  

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IN 3 phase induction motor where we give i/p supply & how its working ?

2 Answers  

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Main advantage of auto transformer over two windings transformer is that A it needs no cooling B it uses only one winding C core losses are reduced D it has simple construction

0 Answers  

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what's the meaning of the negative going half cycle in the circuit containing a bulb and a switch in series with a input ac source. i mean what happens in the -ve cycle. the dir. of current changes or any other thing. if dir. changes then why we use fuse in only phase wire.

2 Answers  

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advantage,disadvantage,aplication of sensorless direct torque control of induction motor

0 Answers  

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we done magnetic balance test for 33KV /440V transformer in our company , but the ratio out is confusing us Voltage applied in RY = 440 , at RB = 320 and YB = 60 RY 440 = ( RB + YB ) 380 only Please let me know what type of problem is it.

2 Answers  

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Why we use two wattmeter during block rotor test and no load test of 3phase induction motor? And how can we understand the neat power requirement of from this test?

2 Answers  

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electical engg basic question

1 Answers   Power Plant,

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