What is the difference between Relay and Contactor

35 Answers   Siemens,

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Is there any design in the world a 220 KV transformer without breather …??????

2 Answers  

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Why is transformer core is earthed

3 Answers  

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what is consequences of neutral and earth connect?

0 Answers  

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why usa use 60hz and 110v?

2 Answers  

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why ht motors are connected in star?

1 Answers  

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What makes the difference between 50Hz supply and 60Hz supply which one is economical and how can you support your answer...........?

2 Answers   Fertichem, Kuwait Oil Company,

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hi friend i am going too attend for hpcl in this month please help me by sending written test question papers i am in the stream of E.E.E

0 Answers   HPCL,

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If oil and air can withstand a high MeV when used as an insulator in a transformer, what are the values of how high for each material?

0 Answers  

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1. what is the power factor of a purely inductive load? (i) Zero (ii) Lagging (iii)Leading (iv) Unity 2. which type of transformer connection is preferred in case of power supply transformer? (i) Star/Star (ii) Delta/Delta (iii) Star/Delta (iv) Zig Zag/Star

2 Answers  

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How to calulate cable size for 200KVA,160KVA& 40KVA load?

1 Answers   ABB,

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why in crona effect it give violet colour.

1 Answers  

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