What is harmonics and how the 1st,2nd,3rd etc harmonic levels

2 Answers  

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please send 5yearje solved papers on my email himmatsinghnathawat@gmail.com

0 Answers  

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what is shunt trip coil? what was the function in rmu?

1 Answers  

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what is the use of neutral displacement relay

1 Answers   OCL,

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What will happened if the neutral of the (star connected secondry) Xformer disconnected? (if its Above KVA rated one)

0 Answers   Equate,

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How to determine stage of Automatic Power factor controlling Relay(Apfcr)?

0 Answers   ABC,

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what is working process of star delta controlling circuit ?

0 Answers  

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what is the difference between relay and a contactor.

5 Answers   Siemens,

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Can any one help me how to set an overload set the range from 2.8A to 4A , rated motor current 22A, CT 60/5A

2 Answers  

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What is the relationship between the sending end and receiving end?

4 Answers  

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1. which type of transformer connection is preferred in case of power supply transformers? (A) Star/Star (B) Delta/Delta (C) Star/Delta (D) Zig Zag/Star 2. In a power transformer usuall which winding is closer to the core? (A) Primary winding (B) Secondary winding (C) Low Voltage winding (D) High Voltage winding 3. The power factor of a purely inductive load is (A) Zero (B) Lagging (C) Leading (D) Unity.

9 Answers   CECRI_Central_Electrical_Research_Institute,

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Is it possible to import & export power through the same power transformer? what will be the vector group normally for both different or same?

1 Answers  

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