Answer / guest

yes, bcoz the negative is the desired return path for the
current in dc system .were as in ac system
earthing/nutral is the return path

why we use star and delta connection?why we donot give the supply directly?

12 Answers   Hitech, Siemens, Tata Steel Limited,

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Actually why the transformers are rated in KVA.?

4 Answers   BSL, Engineering,

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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 mcb

7 Answers   L&T,

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explain the working principal of the circuit breaker?

5 Answers  

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What is the formula for selecting the cabels according to load? How to calculate what sq.mm cabel to be used?

0 Answers  

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what is reasion of harmonic create the power supply , And how to reduced to harmonic

1 Answers   Turbo,

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the total iron closs in a transformer core at normal flux density was measured at 25hz and 5ohz and was found to be 250w and 800w respectively.the hysteresis loss at 50hz would be................?????

1 Answers   ABB,

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What is meant by locking of rotor in synchronous motor? Explain me locking in detail?

3 Answers  

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how the 12 pulse rectifier is made?

8 Answers   Engineers India Limited,

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What is d role of reactive power in power system??How it produce & consume?

5 Answers   ABB,

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Why we are not using capacitor in line when load on Genset?

3 Answers  

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