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Answer Posted / kt.chitra
Electrical and electronics engineering
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1. Can a 12v DC choke operate a 60v/12w PL lamp ? 2. Can a 230v ballast fire / operate a 60v/12w PL lamps.
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?
what is the purpose of slope in the differential relay?why we are using two slope?but in busbar differential we are using only one slope.why?
what is the question paper model for section engineer in RRB
Which type of transformer is used for lighting loads?
What are the applications of different multistage amplifiers?Plz also write advantages of these amplifiers? Thaaaaaaaaanx
when we gave dc supply to 220v dc motor its rpm is 1200. then we gave 180v. how many rpm of its motor. gave answer with calculation at my ID.... ravizak@ymail.com
how many synchronous motor are there in any power plant
1.4 What is meant by CT knee point voltage and how would you determine it
What is capacitance?
Why Transformer Neutral having one earth pit ( more earth electrode resistance) whereas body have many earth pit ( less earth electrode resistance)?
what happened when we supply a dc current in dc motor?? can it worked properly?
whatis the commertial spec. of distribution boards ?
why they were using TRIAC instead relay in some controllers and what is the advantages.
What is the effect on 3phase induction motor if current setting knob of DOL kept at minimum current?
