what is HI POT test

4 Answers   Suzlon,

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There is air in a room . the top and bottom of the room are at constant temp. T1 and T2. DRAW THE temp profiles if a. T1 greater than T2 b. T1 less than T2

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if we convert kw into Ampers,which one formula use by us,pls tell me?

9 Answers   ABB, Essar,

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Compare salient pole and cylindrical rotor machines.

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ASTM D 3455 - Standard Test Methods for Compatibility of Construction Material with Electrical Insulating Oil of Petroleum Origin has been used for Testing Transformer Oils with a product placed in it. Aged Control Oil has a Power Factor of 0.032% at 100°C. Aged Oil with a Test component has a Power Factor of 0.093% at 100°. Is this increase acceptable? If not why? How much increase is acceptable?

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State uses of different types of stsrters with different capacities of motors as below: a. up to 5HP b. above 5hp to 10hp c. above 10hp to 20hp d. above 20hp

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is it possible to use a tranformer to regulate an unstable system voltage?

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how the 3phase induction motor is running in 2phase supply with help of capacitor?

1 Answers  

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In our generating power station we get electric shock in the battery bank, what will be the reason?

3 Answers  

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why we condut tan delta test i want brief explain?

3 Answers  

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In domestic supply, when neutral touches earth the earth leakage trips. Does this mean that if the star (neutral) point of an alternator is earthed that power will flow to earth i.e. a direct short to earth?

1 Answers  

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what is the maximum permissible limit value of leakage current and leakage counter reading to replace lightining arrester?

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