Answer / abdul

It depends on the how much the power factor has to be improved
simple calculation would be
Kvar = KW [tan (cos inverse (old pf) - tan (cos inverse (new required pf)

Answer / girish

KVAR=KWX0.541(Power factor improvement at 0.98)

KW=20
KVAR=20X0.541

10KVAR

2.5KVAR 4 Steps

what is the meaning of TRF

1 Answers   Khidmah,

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It is desired to flood light the front of a building 42 meters wide and 16 meters hig.Projectors of 30 degree beam spread and 1000 watt lamps giving 20 lumen/watt are availabl.If the desired level of illumination is 75 lumen/m and show a suitable scheme.Assume the cofficient of utilization, deprecitation factor and waste light factor are 0.4, 13 and 1.2 respectively.

0 Answers  

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in 132 kv substation ligtning arrestor(120 kv) connected to line. but line voltage comes to 132 kv, it operate or not???

4 Answers   Divis Laboratories,

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why neutral and body earthing of transformers kept separated? what is distance between two is required as per is?

6 Answers  

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

0 Answers  

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hi this is hema can anyone mail me previous years questions for the APPSC-A.E.E (in electrical stream.) ......thank u.

0 Answers  

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what is the formula of knowing the clabe size on any load?

1 Answers   JSW, Scan Steel,

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What do you mean by the zone of protection?

0 Answers  

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why farmers are use earthing instead of neutral for their light conec. at field.is it safe

2 Answers   Honeywell,

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1.why should we connect the measuring instruments in l.v side in short circuit test of a transformer? 2.why the power factor is less in open circuit test of a transformer?

0 Answers  

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What should be the dielectric strenght value of transformer oil of 11/0.433KV distribution transformer and 33/11KV tranmission transformer ?

2 Answers  

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why the value of k is more in shell typr transformers?

0 Answers  

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