Answer / anshul pal

Because these are the losses which occur in lines and cause real power loss, hence these loss can not occur in negative term. As current varies sinusoidally, the square of current will remain positive, therefore accounts to i square r loss.

Answer / md tarekul alam

Pls dear sir, answer me in this question.

Answer / anjan

copper losses nathing but heat produced.it mean that real power loss.thats why I2R

Answer / k.prakashchandra

Pd across a resistor id I(amp) x R (ohm) volts ,power is V X
I = I^2 R watt

Answer / k.prakashchandra

Read above as ' Pd V across a resistor= I(amp) x R (ohm)
volt.Power = V x I = I^2 R watt' ( As pd is measured across
the resistor ,the pf is unity)

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1 Answers   BARC,

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STATE WORKING OF SF6 C.B.?

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In power point wiring,often,we use less size of earth wire compared to phase & neutral wire and we use big size pin in pug top. how is it justified? can we use small size cable for earthing?

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4 Answers  

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0 Answers   UPPCL,

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3 Answers  

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I hv a question regarding power factor improvement just after transformer. I request you to reply me plzz. thank you sir. My friend has a small unit of fabrication. in his factory the main load is a welding machine, lathe machine, grinding machine. this load is not continuous type. now our electricity board has installed 16 KVA, 11000/433 V transformer for our factory. In the energy meter (trivector meter) at LV side of transformer, i hv seen power factor value of 0.15 only when only 3 KW load was flowing. Further electricity board has suggested to install 4 KVAR capacitor at LV side after energy meter. Now my question is that if we permanantly install and switch on 4 KVAR capacitor after energy meter, during some load on transformer and also without any load on transformer, wht will be the power factor shown in energy meter?i dont want to get any penalty by electricity board, so plz suggest me if i can permanantly install and switch on the 4 kvar capacitor or not at LV side of transformer just after energy meter? Thank you again and awaiting for ur positive reply soon.

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2 Answers   HPL,

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What should be the magnetic balance test values for a 3 phase delta/star connected single primary dual secondary winding transformer (90 MVA / 2 X 45 MVA TRANSFORMER)

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