Answer / urvish mehta

basically motors used in fans are 1-phase induction motor...$ this 1 phase induction motor can not start itself .....it need some equipment which provides necessary phase shift between its stator & rotor.....capacitor serves this purpose in fans....

For a 50MVA (138/69/13.8 KV) transformer, what would be the maximum demand in order not to exceed 80% of its operating capacity.

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the winding of Gen and Motor is star or in delta ??? and why

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type of transformer

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a simple c++ program to calculate simple interst with its data members as private

0 Answers   L&T,

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Briefly describe means used by electricity suppliers to influence the flow of active and reactive power in power networks (one for each type)?

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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 the principle of singkle phase energy meter?

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why are use corona ring in high tension line switchgear?

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Enlists the applications of sampled data systems?

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WHAT IS SITTING AMPS IN OVER-LOAD RELAY FOR 1PH OR 3PH MOTORS?IF ITS NAME PLATE GIVEN MAX AMPS 10AMPS?

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What will happen if induction motor is supplied with capacitive load?

1 Answers   NTPC,

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Why we use shunt coil in breaker??????????

7 Answers  

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