Answer / aruniscool

Motor is designed to with stand the surge of starting current for a short period.if load driven is jammed or over loaded the time the overload thermal relay will trip and save the motor from burning.

For a load of 40HP induction motor.what will be size of Armoured copper cable require to connect the motor to starter in Star-Delta?

1 Answers   CG,

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As an electrical engineer what are the responsibilities which i can hold in TCS?

0 Answers   TCS,

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why current flow throgh conductor.

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What is tranformer differtial?

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how pt is using

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A 15 kw squirrel cage motor having a maximum efficiency of 90% on a continuous full load has temperature rise of 42 degrees celcius after 30 min and 52 degrees celcius after 1 hr under the above operation conditions. a) calculate its final steady state temperature rise on continuous load and the heating time constatnt. b) if the motor is operated on a short load for 9 min estimate its temperature rise. c) calculate the maximum overload that can be applied on a short, 9 min rating so that the temperature rise is the same as the final steady state temperature rise on continuous load.

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what is x'mer ,isolation x'mer & yltra-isolation x'mer?????

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what is the purpose of measuring % impedence?

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Why hydropower is called renewable source of energy?

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WHAT DO YOU MEAN THE DIFFERENT TYPE OF CURVES OF RELAY LIKE STANDARD INVERSE, VARY INVERSE, NORMAL INVERSE, LONG INVERSE ETC....

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how can we run the induction motor at 9000 rpm ,by keeping frequency constant??

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what is difference between isolation and ultra isolation transformer?, what is the method of testing ?

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