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why we are caling 440 volt 3 phase supply instead of 660 volt 3 phase supply? because each phase as a voltage of 220 volt. if anybody know the answer for my question please send it to my mail id. thank you.
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3 23475what is power factor? how can we correction the power factor if this is high or low? If anyone know please please send the answer on my email id ( kumarkirshan@in.com )
5 8457Can I use distributon class/transmission class Lightning arresots for protecting the building? If not why please explain?
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how can i get an electrical c-certificate?
sir i completed apprentice in TNEB.apprentice is eligible for 'c' licence
will 1050kva DG set withstand for back charge of 16MVA transformer
In convertor can we use rectifier thyristor in place of invertor thyristor with explain.
No load tap changing transformer working
Why is voltage is required to be within permissible range for an electrical equipment?
what is apparent poewr, reactive power, & active power?
specify the inbuilt protections in DG
WHY SEPARATELY EXCITED MACHINE NEEDS EXCITATION BY DC SUPPLY WHY NOT BY AC
How to know any size of cable if there are not written on cable? Answer must be theurical not by experience.
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?
Benifits of 3ph 4 wire metering over 3ph 3 wire
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why magnetising curve not start with zero voltage?
How to size Air Circuit breaker (ACB)? What is the most important factors?
