Answer / 7anoter4

Practically there is not any difference.If the insulation is suitable for both
only the maximum permissible current will be different.In d.c.system the losses
in conductor are lesser-since no skin or proximity effect is involved and then the
conductor will reach the maximum permissible temperature for a more elevated current.

Is there a standard depth of gravel fill in Substation Switchyard? Please give a design/drawing. Thank you.

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losses in transmission lines ?

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surge tank, hrc fuse, earthing transformer, firm power objective type

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How will change the frequency in distribution side?

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How the Oil Surge Relay works? How it protect the OLTC?

3 Answers   JSL,

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In separately excited m/c,we excite the field by a dc source,what not with ac source?

1 Answers  

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Y phase's (RYB) r only 3,not 4 or 5?plz answered in breif?

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why we use negative feedback in control system.

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why the transformer ratings in kva

8 Answers   NTPC,

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For DG set,if the loading is increased,does flue gas temperature increases or not?

2 Answers   NTPC,

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what is V=4.44FBN, THIS 4.44 ONLY U GOT the voltage in term sof 11, 22 etc this 4.44 u will get from form factor which has a value of 1.11

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what instruments used for measuring of inductance and capacitance.

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