what are the current specifications of bus ducts ? i ve seen in IPBD bth 22000 A and 1500 A in 400 kv switchyard . why it is so??

1 Answers  

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why 3 phase is preferred than 1 phase?

4 Answers   Infosys,

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What are thermo couple cables and where they are used.

2 Answers  

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can HT cable or HT bare conductor used for LT line? is yes what would be the current rating?

2 Answers   ACC, wbsedcl,

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line and phase voltage relationship?

2 Answers   CPCL, IVRCL,

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in what type of applications v can use q meter?

0 Answers  

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how tan-delta test is performed?

1 Answers   GE, VDL,

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what is practical efficiency of power transformer..?

1 Answers  

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When a square wave is applied to primary of a transformer then what will be output wave form of secondary ?

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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For a 50MVA (138/69/13.8 KV) transformer, what would be the maximum demand in order not to exceed 80% of its operating capacity.

2 Answers  

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How can we define 'Phase'

4 Answers  

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