Answer Posted / er. manoj

Now consider a situation when there is a fault and coil supply is given AC, as we know in case of fault there is a voltage dip, so across the coil sufficient voltage would not build up to energize it. So DC is given across tripping or closing coil

what is the difference between unarmoured & Flexible cable? How to identified?

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how we can explain arc heatng?

1946

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Please, if 1kw is equal to 1.25kva; how then do I know how many kva in 7.5kw?

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Why squirrel cage motor can only use with low starting loads ?

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How we can change the direction of rotation of Induction motor? Prove it using graphical

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please suggest some good universities with low cost iam in totally full confusion so please help me my profile gre 283 and ielts 5.5

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What is diversity factor in electric installations?

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What is the height of DA, DAL, DB, DC & DDE tower?

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why industry prefer ht motor instead of lt motor.

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substation+ plc system

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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.

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Which is the oldest hydropower plant in india?

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how we decide scurt (disc) of insulator with respect to kv rating

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i want to run 11kv star connected motor in 6.6kv with delta connected throught inverter, is it possible?

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Why syn. Generators are used for the production of electricity?

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