Answer Posted / shubham choudhary

In online ups load take supply from ups throughout wheather supply is turned on or off and main supply is always connected to the ups but in offline ups the load is first connected to the main supply and when the main supply goes off then the load is transfered to the ups.

why does a dc machine has high efficiency while working as a generator than as a motor ..

1946

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Formulae for calculating the transmission line losses for different voltage levels

2114

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Actually I have a doubt on neutral and earth.we use Ac power without taking neutral by connecting to earth,but at that time does it affects on efficiency of any electrical components or no? If yes how?

1335

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True or false question. 1.The fuse provide phase and neutral 2.power loss in electrical circuit can take place in (resistance or inductance or capacitance). 3.two phase system each phase has separated by a phase difference of (90 or 180 or 270 or 45). 4.3 phase balanced star connected load neutral current shall be (line current or phase current or zero or unity)

1522

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how point on wave controller works.

2551

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What is pd controller?

1057

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What are the operation carried out in thermal power station?

1003

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How to minimize the eddy current losses?

1105

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Do closed loops systems require manual input?

1144

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how to determine ct ratio in ht vcb?

1779

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why d.c produces corrosion

1946

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what is the principle of operation of tungstun bulb ??

1783

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How to calculate phase to phase difference ?

2192

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How relay coordination has to be done? what are the inputs are required for this? Please explain this with calculation method?

1741

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how a resistor resists to flow the current?how an inductor oppses the sudden change in current?how a capacitor opposes a DC voltage.

2715

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