Answer / subra

DC system also earthed,
In Tele communication equipments are working in 48V dc system
In this DC system positve is directly Grouded( earthed )
Normally this system is called -48v DC system

Answer / ramprasad

DC has no Leakage current but AC has because there are 3
phases in AC and one common neutral points in AC star
connection

what is the different between rms and average value

1 Answers   Finolex, TATA,

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What is reactance? what is the function in Auto transformer and why high leakage reactance?

1 Answers  

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what happen if power factor goss to above unity (one) ? of any electrical system or motor.

10 Answers   Air Liquide,

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Supose we have one 220v A.C fan.if we provide 220v D.C what will be happen?

13 Answers  

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how to check three phase motor torque value?

0 Answers   Apollo,

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WHEN TWO ALTERNATORS ARE OPERATING IN PARALLEL, EXPLAIN WHY IT IS OBJECTIONABLE TO OPERATE ONE AT A LEADING POWER FACTOR AND ONE AT THE Lagging power factor?

1 Answers  

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Are we do it in single transformer with dual primary as 11 KV and 33 KV and constant output as 415 Volts?.

1 Answers  

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how vector surge relay works ?

3 Answers   BFL,

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lenz law application and define

0 Answers  

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What are the two types of transistor and how they are made?

2 Answers  

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How to calculate the ups battery back up? give the formula.

15 Answers   Cushman Wakefield, Ethio Telecom, Exide, MacLellan, Morgan Stanley, TATA,

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Why did call copper as a electrical conductor?

2 Answers   ABB,

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