what is wave trap? And how it works?

3 Answers  

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what is transformer tap change HT side and LT side

1 Answers   Alstom, Sodexo,

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How to define Kirchhoff current law and voltage law along with simply examples.

0 Answers  

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a room heater is connected in serise with a 100w bulb.if the 100w bulb is replaced by a 40w bulb then the output of the heater is increase/decrease/remain same?

9 Answers   College School Exams Tests,

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How Can we calculate the rating of a cable?Show the formula?

2 Answers   Jindal,

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condition Autotrip facia come on control panel of electrical transmission line?

0 Answers   Getco,

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1. What is differential relay? How it operates? 2.How to calculate the Short Circuit Impedance in Transformer? 3.What is the alternate solution for testing of polarity by using polarity tester while its milli ammeter does not works? 4. While testing the 33KV Busbar by using Hipot kit, what should be the test voltage we have to apply? 5. What is the procedure/activities to be taken to inject the current more than 2000A by using 2000A Loading Transformer? 6. Explain how you can give the overload setting to any Motor Protection Relay for a HT motors with formula and example? 7. Why restricted earth fault protection is needed? Why can’t differential Protection is sufficient? 8. What should be the minimum and maximum ohmic value for earthing? 9. Why DC Currents are not used in transformer? 10. What is the Frequency while we step up the voltage from 220V to 11KV? Is it possible? Explain it?

0 Answers  

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Is there any reason that we get shock on touching phase wire because the earth is at neutral potential? Is there any reason that the earth is at neutral potential because the neutral is earthed in apower station

0 Answers  

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How to improve the power factor from 0.8 to 0.98? Also tell me cost vs benefit analysis.

2 Answers  

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how to calculate the power factor when instantaneous voltage and current has harmonics in it ?

0 Answers   Sandhar,

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How much energy save vfd if motor run on 50 Hz (full speed)

3 Answers   Reliance,

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What is the working of Field winding in dc motor, in which part is it work or why ?

3 Answers  

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