Answer Posted / arvind kumar

As we all are aware with formule

NS=120f/P, if we change f(frequency) the syn.speed will
change as these quantities are directly proportional to each
other.

How to decide whether A / B / C / D curve type MCB should be used?

2363

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i want to run 11kv star connected motor in 6.6kv with delta connected throught inverter, is it possible?

2088

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What is the real function of reverse power relay in generator panel while syncronising?

2304

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Why we use ups battery and dsdb battery in thermal power plant

2148

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what is proper capacitor placement? How to evaluate capacitor size?

2180

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What happens if the Capacitive Voltage Transformer Primary neutral is not earthed. There is a CVT between Transformer and source, and the CVT neutral of the transformer is not earthed, does it effect the transformer while charging or does it effect the transformer charging process.

4377

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WHERE NEUTRAL WIRE IS CONNECTED AT DOMESTIC TO TRANSMISSION LINE(SINGLE PHASE TO THREE PHASE)

1886

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How many capacitors using in LT panel as per Govt rules?

2022

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What is K-rated transformer? What is the use of it? What can be the size(pls provide calculation if possible) of K- factor transformer for 550kW,690V motor operating with drive (VFD)?

2327

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For a 6.6kV Motor it is recommended to do megger test with 500 V d.c and not more than 5kV d.c but the Hi voltage withstand test should be performed by 12kV AC. Why the dc voltage test should be limited but AC voltage withstand test could be with such a high voltage?

2382

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what is the difference between earthing and unearth

3195

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I use 20 nos led tube 4feet, in pathway 100mtr approximate, so what size cable i use for lighting

1514

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71ohm,111ohm,95ohm,179ohm in calculate the total ohm in series circuit

1736

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what are the basic insulation levels & what its Unit

2074

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Why are cables rated for 40 KA for 0.25 Sec fault current rating?

2006

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