Answer Posted / kumar

normally

for 11KV OH system what will be typical per KM "R" "L" "C" parameter. for 33KV OH system what will be typical per KM "R" "L" "C" parameter. for 33KV UG system what will be typical per KM "R" "L" "C" parameter.

2096

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We have 90mX100m hangar with 16 no.of supporting pillar. It is required to provide power supply on all pillars. what is suggested earthing scheme for hangars.

1698

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Generation of voltage for each phase are same of a turbogenerator.Although the short circuit current flow when two phase of turbogenerator are shorted(where current can't flow without potential difference),why?

1745

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at work we have a 3 phase motor but on testing one phase isnt getting a reading. it runs 24 hours a day all week. stops and starts well no noise or heating. the phase isnt down to earth.is it just a bad meter reading or not? phases one and three came up with a resistance reading of 0.4 but phase 2 couldnt get anything shows up as open circuit.

1277

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how technical is calculated in 11kv line and lt line

1547

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What is the function of electron gun used in crt?

703

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What is the differance between 2 dc motors of armature voltage 660 v and 440 v?

1630

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How to calculate loses in transformer of 160 KVA ?

1333

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there is an alternator 480 k.w, 400v,50hz, 4-wire running on load having leakage alternator body earthed current 38 A. is it within acceptable limit? if yes then give reference if no then how to bring within specified limit

1592

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The power factor of the fixed load is 0.8, now the p.f is varying from 0.8 to 0.5.

1671

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how to calculate the surge level of surge suppressors related to the SF6 cicuit breakers?

1661

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how to electrically make connection to ferroli GN2N?

1595

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Convert a star connected network into a delta connected network.

766

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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.

1542

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draw the restricted earth fault protection circuit install on power transformer and identify its parameters and draw C/C curve of it

2304

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