Answer / k.prakashchandra

Classification based on max allowable working temp 1. A
-1o5'C -oil ,bitumen 2.B -130'C-polyester film, mica 3.C
-above 180'-quartz, porcelain 4.E-120'-glass cloth,resin
5.F-155'-mica, glass, asbestos 6,H-180'-silicone rubber,
composite mica 7.Y-90'-wood,cotton

how DC is differ from AC ? what are the difference between them ?exept (P-N)&(+__-)

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What does Transformer vector connection Dy11y5 means?

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what is the frequency standard with tolerance level for India?

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Im designing APFCR Panel for 600 KVAR.I need to calculate the full current so that i can choose the capacity of isolator/Breaker.Kindly suggest with formula.

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If an electrical component has a positive temperature coefficient, how come such components have high power losses due to heat if current decreases when resistance increases? assuming power given by I^2*R whereby the Resistance is infinite.

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could i arrange a faulty and healthey battery bank togather in parallel , if your ans is not then why?

3 Answers  

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