What is VSCF windelectrical system?

0 Answers  

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i have three phase 25kva transformer but there is two phase line how can i connect to the two phase line?

2 Answers  

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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?

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Can anyone send details regarding motor protection relays ? their manuals please ?

1 Answers  

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In case of dc circuit Whether dc current will pass through capacitor after it gets charged?

2 Answers  

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What do you mean by turns ratio of instrument transformer?

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single phase voltage 230 and Three phase voltage 450 why 690 voltage

1 Answers   XYZ,

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What is working principle of washing machine?

9 Answers   IBPA, Samsung,

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what is mean by induction & conduction principle ? how they differ from each other ? thank you

1 Answers  

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what is relation between torque and speed / rpm?

1 Answers  

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What is the Minimum winding resistance of motors ( small & big)? referance range

0 Answers   TATA,

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whether starting current is limited to rated current of motor through soft starting or it exceeds the rated current?

0 Answers   DAE,

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