Answer / engineered

Factors for selection of cable
1.Rated current
2.voltage drop across cable
3.derating factor based on temprature,no. of cables laid
through same path influencing each other
4. Type of laying method:- like air, ground, duct, tray,
raceway
5. type of conductor required.
6. type of insulation, like PVC, XLPE, FRLS based on site
condition

Differentiate between Low and High impedance Protection

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there are 3 transformers each of 1500 kva and one transformer of 1000kva for a 11 floor building . total otgoing kw is 4066 kw. i need an extra 260 kw .is there any provision for that? what is the max kw that can be connected with these transformers?

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What is meant by derating factor?

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WHAT HAPPENED HT MOTOR FEED WITH LT SUPPLY

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lightning current is ac or dc..?????

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The DC current waveform is - . What about the fire alarm waveform?

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why transformer is rated in kva?

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how can motor both beasrings insulation resistance can be check?

0 Answers   GE,

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how does a tube light starter works?

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During the testing of Electrical Equipment the test cables should not touch the equipments. For that testing engineers use to cotton rope to hang the cable from measuring Equipment to testing equipment terminal. Please explain the technical reason for this practice.

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what happens if i connect acapacitor to a generator load

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what is the difference withbeen lighting capacitor and motor capacitor?

2 Answers  

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