What are the insulation standerds for eg H clase and how many insulation standerds are there and its standerds??????

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what is maximum demand.

9 Answers   HP,

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Dear sirs, pls check this 4-20ma to RS485 module datasheet,pls guve me some suggestions. http://www.szsunyuan.com/sy/pro_more.asp?Productid=539 Thanks. E-mail:yunianjiang99@gmail.com

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What happens if the negative to earth voltage is greater than positive to earth voltage in the battery of substation?

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what type of transformer used in soft ware parks its distribution or power transformer. like 1800 kva

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how can we select the type of wire.what factors we have to look on it , do we have some formula to calculate it. please guide me on it

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WHY IS HV WINDING OF A TRANSFRMER SECTIONALIZED???

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what would be the earth to neutral voltage in industries? if it is not main Taine then what will happen?

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We are planning to synchronized DG's with our captive plant in the event of black start of plant, but before sync we checked voltage of DG with our plant voltage and it varies from 5 V to 450 V. So in this condition how we can sync DG with plant ?

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Grounding. Dear all at one of my site we checked the amps at the earthing cable to the alternator it was found 125 to 130 A. at the neutal cable in same machine found 146A. in the same plant checked the earthing current on other alternator it was 52A, and neutral 116 A. we are facing problems with our controller and the card was damaged once. can that neutral/GND current be a reason? as there is common grounding for the Alternator,Brkr panel,Transformer?

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how i decrease the neutral to ground voltage , thats i read 7v on my digital meter.i dont know about my earth pit.

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some practicle study shows that the reactive power at the receiving end is not equal to the reactive power at the sending end.But according to theory the reactive power is exchanged by different parts of the network – capacitors and reactors permanently, but is never consumed or produced. Then Where that reacrtive power loss occuring?is there any formula to calculate reactive power loss?

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