Answer / zulphikar ali

Insulation resistance is measured by applying DC voltage in
order to avoid capacitive currents

Answer / santhosh

hi Gunashekaran pls let me know what is the meaning og IC IN your above answer

Answer / gunasekaran

we want measure the leakage current of the insulation if u
use AC it is alternating nature so IC is not zero. so we r
not getting exact insulation properties of the insulator. so
we go to DC.

need to make a report. Need to choose a 3phase induction motor. Load conditions motor will operate in : Maximum Load: 30 Kw Speed: 2950 rpm Ambient temp: 20 cent Supply voltage: 440V Frequency: 50Hz need to look for the safety factor when choosing the motor, went through catalouge found a few, but dont know how to choose the safety factor allowing an extra load something above 30 KW to avoid any harm.

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what transformer we used normally and upto which kva?

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what is difference between ac voltage and ac current

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explain harmonics in simple words..........

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oil cooled transformer

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0.5,1,1.5,2.5,4.0.6.0,10,16 square mm electrical wires how much take maximum current in 50htz

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My meter ratio is -/5 and ct ratio is 100/5 now what will be the multiplying factor and how ?

1 Answers  

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