what will happen if phases are not shorted with neutral in transformer impedance test? and if neutral is not connected with ground?

1 Answers  

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If Earthing is poor in a DB of of Residential Building, will residents feel a leakage voltage in a Electrical Ssytem? is this statement true?

1 Answers   Dolphin International,

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how the inductor will work on dc supply?whether it will work or not?

11 Answers   NTPC,

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why our power production in multiples of 11.

2 Answers   ABB, Infosys,

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When we use air circuit breaker, it has O/L protection ,time delay SC protection, Instataneous SC protection & ground fault protection. They all have some setting range. But what is the suitable/allowable setting for the above protection which will be safe for the equipment? For example-O/L protection setting have a range of (0.4,0.45,0.5,0.55,0.6,0.65,0.7,0.8,0.9,1.0)xIn Time delay SC protection have a range of (1.25,1.5,2,3,4,6,8,10,12)xIn Time delay setting is 0.02,0.1,0.2,0.3,0.4 Instataneous setting is fixed to 20xIn Gound fault setting is given 100A,300A,600A,900A,1200A This setting are for 2500A ACB. So what will be the basic allowable setting for the above protection? is there any formulae to calculate this<

0 Answers   Lupin,

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why are distributed windings generally used in alternators?

0 Answers  

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Operation of isolators.

0 Answers   KSEB, L&T, Siemens,

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Shall we use Dyn1 transformer in place of Dyn11 for motor application as a distribution transformer

1 Answers   NSL Sugars,

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extremely urgent please, why a fuse is used before voltmeter but not with a ammeter connected to a CT(current transformer),thanks in anticipation.

4 Answers   NPCIL,

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What do you mean by a current transformer?

0 Answers  

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WHY IS THE UNITY POWER FACTOR NOT THE MOST CONOMICAL POWER FACTOR?

3 Answers  

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what is the mho relay

3 Answers  

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