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Why Diffrential and Ref relays are used together although Diffrential relay can protect Pri and Sec of Transformer

1 Answers   Qatar Gas,

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Moving Iron instruments are applicable with a) DC only b) AC only c) DC & AC

14 Answers   Bhel, Engineers India, Engineers India Limited,

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how to convert lv line to hv line and viseversa, any losses will occur during this process

0 Answers   Jindal,

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why aggregate is placed all around substation ground.

1 Answers  

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calculation of knee point voltage of current transformer?

2 Answers   TATA,

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what is the significant for using two types of voltage(line voltage & phase voltage)

1 Answers   NTPC,

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if i am in front of transmission line how to know that current direction without any equipment

0 Answers  

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Testing report of Earthing of 3.15 MVa PTR.

0 Answers  

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when will cause the negative sequence falut in electrical system?

2 Answers   Schneider,

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How we calculate the size of H.T cable for any transformer & rating of busbar for any L.T. panel?

3 Answers  

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What are hrc fuses and where it is used?

0 Answers  

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Explain role of Buckolz Relay in Transformer ?

7 Answers  

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