Answer / prakash

A 3-phase 3-wire system does not contain a neutral. This
occurs when you have 3-phase loads such as motors that do
not require a neutral. A 3-phase 4-wire system has a
neutral. A neutral is required to obtain either 120 or 277
volts in a 3-phase system. Both of these scenarios can
occur on wye and delta systems.

Starting times for soft starter & power factor is thier any standard or datas available in manufactures list. Kindly suggest.

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Dear All please ive me ur ideas... What is the major diff between cu conductors and Al conductors ?

3 Answers   MX Technology,

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Can any one tell me the current VAT, Sales Tax, Octroi and Excise duty for the financial year 2009 -2010. Say control panels are manufactured in maharashtra, then what will be the taxes for within Maharashtra and outside Maharashtra?

1 Answers  

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what is neutral grounding? why is it required? what is neutral grounding resistor and how is its value calculated??

11 Answers   NTPC, ONGC,

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a solenoid of inductance 250mH and resistance 10ohm is connected to a battery. the time taken for the magnetic energy to reach 1/4th of its maximum value will be?

1 Answers   SSC,

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how calculated Transformer losses.

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what is mean by marshalling box in transformer?

8 Answers   Reliance,

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What should be the values of settling time, peak time, steady state error, overshoot, rise time, MPOS (Maximum percent over shoot) to keep the system in transient state, to keep the system in steady state ?

0 Answers  

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Isi standard of lux level required / to be maitained in different working place general & in textaile industry.

1 Answers  

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why we are using DC supply in megger?

3 Answers   TATA,

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why core is useful for the transformer and in its operation

1 Answers  

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When we use PT in HT Panel why the ratio is 11Kv/√3/110v/√3 please explain briefly with suitable formula?

1 Answers  

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