Answer Posted / godwin

if it is ac machine p=vicospi for 1phase
p=root3vicospi for 3phase
in dc p=vi

I want formula to calculate cable size as per load given in length & amp. I searched many sites but didn't right answer. Please reply me asap.

1455

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What is Tachometer used to measure?

1228

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I need the recommended size for a 3 phase transformer at 13.8 KV Primary and connected loads of 3000 kVA at 4200 volts and 2375 kVA @ 480 volts AC.

2002

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how to identify conection leads of an unknown electric motor

2118

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For a stable system, where should the poles of a system be in a root loci plot?

1215

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Explain the experiment on ward leonard method of a speed control on a dc shunt motor with an suitable circuit diagram.

2572

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If I bring a basic electric meter from the States and hook it up in Costa Rica in a development that has only one transformer for the 50 homes, will it still be accurate regarding the usage of kilowatt hours?

1897

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Define cut-off rate?

1065

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How can we calculate strength of copper hich is supplying electric power to heater and in it hold the heater also and what r all types of forces which is acting on it...

1959

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what is effect of length of air gap on performance of dc motor and generator?

1866

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how the aircraft outer body and inner body is separated ?

1038

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How many wall/floor flange will i use in bus duct system if we have in our design a 35th floor building.

1483

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What are the advantages and disadvantages of negative feed back?

1126

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Why neutral cable carry current.

1958

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I have one ct of ratio 3000-2000/1 Amp its knee point voltage mentioned on name plate is 500-333/30mA-50mA at Vk/2. in secondary box there is three terminal named 1S1, 1S2, 1S3 then on which terminal obtained the knee point voltage ie 1S1-1S2 OR 1S1-1S3 & also specify the knee point voltage for the ratio 3000 from name plate.

2426

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