Answer Posted / daher

star/star in case of line to ground short circuit in star -
delta transformer their is no path to I0 short circuit
current and it will turn inside the closed circuit of delta
connection

what happens in the short circuited secondary transformer,if the resistance of the short circuit is increased gradually?

1917

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What is the function of Governor in Hydro Power Station? What is the Function of Lightning Arrestor Voltage Transformer (LAVT)?

2356

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Define non-touching loop.

799

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Mention how NPN and PNP transistor works?

695

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What is q factor?

664

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What is the method to solve circuit using source transformation?

654

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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.

1442

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take 100kva DTR( delta/wye ), what ll happen if we connect 11kv to LT side instead of connecting to HT side? will the DTR behave as a step up transformer or something else????

1808

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Why is a plain induction motor unsuitable for wide speed control?

1817

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how is capacitor bank look like

1922

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WHAT ARE THE CHARACTERISTICS OF AN VOLTAG AMPLIFIER

1596

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a governer in an Ic engine controls the

692

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i have applied for junior engineer 2 c&w for Guwahati RRB please send me last five year question paper

1588

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Why we specify TNC switch with 1NO 1NC ,2NO 2NC ? how we get connection.?

1258

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please send privious years question papers of jindal steel and power ltd.My e mail id is rajanikant.sngh@gmail.com

1630

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