why transformer is conneted to dc for polarity test.it doesnt work in dc?

1 Answers   ABB, KVPY,

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What will be the average KVA rating of Auto Transformer for 75kw 415V , 3phase induction motor

2 Answers  

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what is the difference between electrical degree n mechanical degree?

3 Answers   IGCAR,

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what ever the ups kva it may 500 kva or 500 va always out put is AC 240 volts its right?

3 Answers  

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why the star delta motors burn out frequently

1 Answers  

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What is the difference between earthing & neutral.

2 Answers  

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What is a pulse transformer?? Can it be called as a dc transformer??

1 Answers  

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why hv current transformers have big size ?

5 Answers   RailTel, TCS,

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what is the distance b/w EHV lines? 1.8m 2.11m 3.4m 4.14m

7 Answers   HAL,

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Difference between induction motor and synchronous motor? i Think Synchronous motors operate at synchronous speed (RPM=120f/p) while induction motors operate at less than synchronous speed (RPM=120f/p – slip). Slip is nearly zero at zero load torque and increases as load torque increases am a right pls guide & send Other Comments

5 Answers   Jindal,

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what is the differnce b/w voltage and current

8 Answers   Steel Plant,

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How seriving & testing of the HT & LT breakers are done. What are the standard Ir values on which we can come to know the test is passed or failed?

0 Answers  

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