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field control armature control

What is floating voltage?

1 Answers  

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how an electron flow in a wire. can it flow like a car running on the road?

2 Answers  

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

5 Answers  

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What is the difference between earthing,ground&nutral?

2 Answers   Bhel,

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what is the diffrence between resistive , inductive and capactive load please explain with exmpels?

2 Answers  

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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.

0 Answers  

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What will happen when more than one star neutral points at same voltage level are connected to earth by metallic conductor?

1 Answers   TCS,

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The transmission does not have options: a)Partition noise b) Flicker noise c) resistance d) Short noise and reason

0 Answers  

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Usage of flywheel diode in relays

0 Answers   Jindal, Voith,

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what is the minimum dielectric stregth of transformer oil.

25 Answers   HP,

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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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define as synchronous generator

0 Answers   Enercon,

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