Answer / aman

Nominal ratio of instrument transformer is the ratio of rated primary current or voltage to the rated secondry current or voltage.

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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cany anyone suggest electrical wesites for providing study materials?

0 Answers  

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why C T secondary are rating 5A generaly .

7 Answers  

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Hello friends., my question is related to testing of current transformer... A Ct having knee point voltage of 750 volts., and I have two step up transformer's of rating 230 v to 440 volts., can I obtain the value of 750 volts by using the two transformer's.... If yes then how could I connect the transformer's to obtain knee point voltage?? thank you in advance

1 Answers   ABB,

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Please brief me about number of pole in alternator.In single phase alternator coils are connected in star or series. How to calculate frequency for the same.

0 Answers  

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where we take earth in hill station

1 Answers  

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How to select the rating of the Transformer?

2 Answers  

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what is differnce between oil transformer & dry type transformer ???????????

2 Answers  

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1.25 kg of hydrogen are burnt with stiochiometric air, the mass of air in kg required is

0 Answers   Caterpillar,

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what is the principle of dc generators?

7 Answers   CPCL,

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what will be the maximum winding temperature of 6.6kv HT motor 450kw, Full load current 49A. 50Hz Frequency.

0 Answers   DVC,

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In a star-star connected h.t transformer why we use NGR on the secondary (l.t)side.

3 Answers   Star, TATA,

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