Answer / mayur m budh

The neutral earthing is bound to take the maximum possible fault current all the times, so the least voltage drop and the least step potential is desired, however a body earthing, generally depending on its criticality and most of the times connected at tow diagonally opposite points is the main parallel path other than the body or supporting structure itself to carry away any fault current.
Every design has an advantage and copper is less resistive as compared to ferrous, so lesser cross section is required to connect on the neutral of a bushing or a generator.

for 500mw power production how many range of transformer set in unit please reply if three transformer use .

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What is the principle of Excitation.

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Can you any explain about active,reactive and apparent power in power system with example.

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Why Dyn11 Transformer is selected for distribution transformer?

3 Answers   JK Associates, MSETCL Maharashtra State Electricity Transmission Co Ltd,

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The rotor current is directly proportional to slip. How?

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how we can improve power factor from 0.8 to 0.85 or 0.9 & how we identify its either lag or lead ? thank you

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Why only mesh earthing is used in G.S.S.?

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how to calculate power factor of capacitor? what is transformer rating?

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what is differnce between oil transformer & dry type transformer ???????????

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how to calculate the output power of vfd , please help me.

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Could anyone clarify my wondering. What is the difference between knee point voltage and saturation voltage of the CT. Is their any formula to calculate these values?

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My question is whether bellow formula is correct to find bus size for 46kA for 0.5 second & what is RT in bellow formula. formula to calculate the size of busbar to withstand the thermal stresses due to currents with duration of 0.2 sec to 5 sec. Sp = RT( I x I x t) / K Where Sp – is the cross sectional area of bus bar in millimeters. I -    is the value of AC fault current. t -    is the operating time of disconnecting device in seconds. K –  is the factor depending on the material of the conductor, insulation and initial and final temperature. Value of ‘k’ for copper is 143.

0 Answers   Premier,

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