Answer Posted / chris w

a contactor has bigger contacts than a relay. contactors are used for higher amps. They operate the same.

What is I to C?

2155

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What is meant by analogous system?

1294

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why we setting 95 deg and 105 deg in wti and oti of distibution transformer ? give the reson for that ?

3151

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which are the criterias needed to select the kind of neutral earthing(solid earthing,resistance earthing,etc.) at various voltage levels in electrical distribution?

1984

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why we have to particulary use ACB for below ratings,even available of MCB,MCCB with that range ?

2930

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How to derive detailed design of Suitable bus Bar for 100A for 6.6KV?

1809

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How to do cable earhing? whether by grounding Armour to ground or by running extra G.I wire along with cable? which one is preferred mostly amoung them? If the second one is more preferable how many GI wires to be run along with cable (1 or 2)?

2140

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what is the difference between delta delta and star delta connection transformer? why we use delta delta transformer since it need earthing transformer for grounding?

2091

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how we can do the insulation on secondary of ct explain and so that tan delta will within limit

1934

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why Lightning arrestor are made by 2 seperate stack of inslutor but why cvt are in single stack of insulator.

1978

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WHICH SIZE A.B.CABLE IS USED FOR 11KV.

2202

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what is the difference between 4pole & 6pole DC Motors & give advantage ?

1906

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In synchronous motor, how the field current is related to armature current..i know its inversely proportional..but concept wise...i was nt clear....pls help me...

2048

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Which of the following alternatives will be cheaper (1) A 100 h.p AC, 3-phase motor (2) Four motors of 25 h.p each (3) Five motors of 20 h.p each (4) 10 motors of 10 h.p each explain

3031

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For R-L or R-C ckt,time constant formula is L/R and RC respectively and its unit is in sec.Pls tell me the derivation

3286

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