for high freq ac,why we first convert AC to DC and then DC to high freq.AC

0 Answers  

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whether a separate starter is used for a motor while it is connected to a vvvf panel?

2 Answers  

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What does VVVF stands for in VVVF drive ? How does it differ from VVF drive?

8 Answers   HAL,

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Anyone who can recommend an equivalent to Envirotemp FR3 of Cooper?

0 Answers  

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What is mean by earthed & unearthed cable? Voltage grade of 1.9/3.3 kV(E), 3.3/3.3 kV(UE), 3.8/6.6 kV(E)what it indicates??

2 Answers  

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what is the use of ballast in tube

2 Answers  

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when the control mechanism is present for an ammeter(1-10A) and 1A current is apllied what will be the reading of the meter?

2 Answers   GATE,

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What may be happen if neutral and earth is shorted in a substation

3 Answers   Bureau Veritas,

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How to calculate loses in transformer of 160 KVA ?

0 Answers   IDV,

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why reactor is connected before capacitor in APFC panel

2 Answers  

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What is difference b/w Microwave and OPGW ??

1 Answers  

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what is ramping rate of generator

0 Answers   Core,

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