Can we use the 60 HZ transformer/rectifier/Motors/Coils in 50 HZ? if not so, why?

3 Answers  

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we all know that corona is nothing but ionization of air around the conductor and there by allowing current to pass through ionized air.but we are not getting any short circuit in between the respective phases though the air turned as a conductive media between them??

1 Answers   Siemens,

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what is form factor.and rms value..

1 Answers   IIM, Torrent Power,

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Which Current transformer will be bigger in size, 400/5 or 400/1 & why?

2 Answers   Apollo,

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Purpose of providing neutral isolation panel for parallel operation of diesel generator

0 Answers  

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diff between grounding & earthing

8 Answers   BARC, Mobiserv, NTPC, Tata Steel Limited,

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1. Why is the speed of shunt motor practically constant? 2. Why dc series motor use to start with heavy loads? 3. advantages & disadvantages of separately excited generator over self excited generator?

0 Answers  

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Why underground cables are used to connect transformers?In addition how are they again connected to lines after step up or step down?

1 Answers  

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describe the Operation of induction generators from bus bars

0 Answers   AMIE,

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what is the RMU and RMU system in sub-station(11kv,66kv.....)

2 Answers   Alstom, Torrent Power,

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what are the application of over current relay?

2 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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