Answer / rajesh solanki delhi

to remove static charge

why inductancce of armature inductance of dc machines is neglected?

2 Answers   APPSC,

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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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Why control of DC motor is simpler?

0 Answers   BARC,

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what is the need of representing AC power in sinusoidal waveform? why not in square or rectangular etc...

8 Answers   Lanco,

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How line capacitance & line inductance varies with increase in height tower.

0 Answers  

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What is the out put of a CT? How the ratio is decided ?

1 Answers  

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why the transformer secondary voltage is more than the load end voltage like t/f 11KV/433V for 415V(terminal voltage)

4 Answers  

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difference between ac motor and dc motor

5 Answers  

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What the main causes of transient interruptions on Over-Head Distribution Lines?

0 Answers   Orion Laboratories,

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

0 Answers   ABB,

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Why is the starting current high in dc motor?

0 Answers  

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if we convert kva into Ampers,which one formula use by us,pls tell me?

7 Answers   ABB,

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