What are protections for dty type transformers

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Please explain open transition and closed transistion system in Star delta Starter?and also the state difference of both?

4 Answers  

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1. alternator has full load regulation of 4% when pf of the load is 0.8 lag, 1500 rpm. full load regulation of 1400 rpm for 0.8lag will be ________ ?? 2. torque angle of a sync m/c operating from a constt voltage bus is usually defined as space angle between _______ . 3. method most effective in finding out no load losses in large DC shunt motoris ______ . 4. current carrying capacity of fuse material depends on ______ . 5. coil has res. 10 ohm, inductance 1H. what wil be current after 0.1sec after switching on to a 500V DC SUPPL ? ? 6. effect of phase lag compensation on servo systems ___________ . 7. rotor of a dc machine is usually supported upon ______ . 8. DC motor is preferred to AC motor in which application ?? 9. 3 nos of 10:1 Xmer are connected in Star-Delta to supply a load at 230V.the supply voltage must be ______ . 10. voltage source produces max current in which circuit. 11. cal. power, if current and voltage are out of phase by 90 degree. 12. suitable length of Xmission line of power at 66 KV. 13. Which of the theorm helps in simple computation when the load across a ckt is varying ?? 14. what is the adopted line length for power Xmission of power by cables ??

5 Answers   TATA,

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132 KV TRFO BUSHING CT BURNT WHEN A 6.6KV HAS BEEN APPLIED TO IT .WHY .ANY REASON ?

3 Answers   vguard,

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what happen if rotor earth fault in AVR system?

1 Answers  

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how many desk top computer can connect to a 25kva 3phase generator?

1 Answers  

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What are the tests to be done on circuit breaker?

1 Answers  

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What is mean by nominal voltage,Explain?.How much nominal voltage?.

1 Answers  

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what is motor

6 Answers   HBL Power Systems,

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i installed 100kva ups. what KVA genset they should provid in input side? plz any update formula or ans with reason.

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what is power factor?

3 Answers  

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Sir we are using 250 kva DG its Diesel consumption 25 lits / hrs maximum load 160 kva now how to calculate units/ litres

1 Answers  

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