i am using auto transformer for starting of induction motor to provide reduse voltages...but the principle of a tansformer according to definition"which transform energy to on circuit to another circuit with constant power and constant frequency". so if i am using reduse voltage then current obsely hige because power is same.but we use auto transfarmer for starting of induction motor to give low current.but here according to definition we are giving hige current.

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why 1.7Uo for HV cable Hi pot test?IE standard why?

0 Answers   ABB,

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a 120 60 watt incandescent lamp has to be operated from 50 c/sec 1 phase ac supply. in order to do this a circuit element has to be connect in series with the lamp. which one of the following sries element is preferable.

1 Answers   SSC,

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what is meant by displacement & magnitude ?

2 Answers  

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What is Residual Voltage & Residual Current?

4 Answers  

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Can anyone please provide me details of MCCB/Contactor/SFU rating calculations for a motor feeder..for example 50 kw.. not from type-2 cordination chart. i want manual calculations..

0 Answers  

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What is the effect of pi controller on the system performance?

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what are inherent currents?

0 Answers   Sail,

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what is the difference between the following 2 situations ? 1)Line & Neutral=240V Line & Earth=230V Neutral & Earth=10V 2)Line & Neutral=230V Line & Earth=240V Neutral & Earth=10V

2 Answers   Reliance,

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What is the meaning of coupling and decoupling in the context of power flow?

5 Answers  

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why the voltage and current in a long transmission line are called travelling wave?

0 Answers   UIU,

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on what priciple transformer works on?

5 Answers  

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