Answer Posted / rushi913@gmail.com

presence of twi winding

In a large office how do we calculate required number of light fittings, assuming fittings are 4x18W or 2x36W fluorescent fitting ?

1930

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What is method of calculating the fault current for a MDB, 50KW, 3PH, 415V, 50HZ?

2176

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What is the formula of frequency ?

1509

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Why we use duplex coil and hook switch in telephone system?

5083

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If increased the frequency up to 1000 then what changes shows in voltage?

2472

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I want formula to calculate current loss with distance in km.I searched many sites but didn't right answer.Plz reply me

2119

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what do you mean by class PS CT and what are technical details needed for calculating it?

2044

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My question is whether bellow formula is correct to find bus size for 46kA for 0.5 second & what is RT in bellow formula. formula to calculate the size of busbar to withstand the thermal stresses due to currents with duration of 0.2 sec to 5 sec. Sp = RT( I x I x t) / K Where Sp – is the cross sectional area of bus bar in millimeters. I -    is the value of AC fault current. t -    is the operating time of disconnecting device in seconds. K –  is the factor depending on the material of the conductor, insulation and initial and final temperature. Value of ‘k’ for copper is 143.

1929

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What must be the distance between the Earth pit which are grounded from two different sources. Example: Distance between the earth pit for LV Panel-1 & 2

2122

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in electrical control panel. how can i choose the cable rating. (example - 11kw motor, 18-25A mpcb}

2909

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where solid grounding and where grounding through ngr done and why?

2636

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Please send 110 kv sb station full single line drawing(sld)

2520

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How does an oscillator differ from an amplifier?

1205

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can any one provide me a connection wiring diagram for a DG set control panel along with BOM?

2252

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1.what is mean by 8/20 micro sec waveshape

2281

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