why we are connecting the alternator to a steam turbine of
higher RPM then the rated RPM of alternator?
For example:( connecting 1500 rpm alternator to 7600 rpm
steam turbine). we can directly connect the same rpm
turbine to alternator know??? is there any special reason ???

Answers were Sorted based on User's Feedback



why we are connecting the alternator to a steam turbine of higher RPM then the rated RPM of alterna..

Answer / k.prakashchandra

Whenever there is sudden 'load throw off' ,the rpm of the
turbine increases considerably ,it may even attain run away
speed which may be 5 times the normal(working) rpm

Is This Answer Correct ?    4 Yes 1 No

why we are connecting the alternator to a steam turbine of higher RPM then the rated RPM of alterna..

Answer / kj

An alternator cannot be built to run faster that 3000 rpm
if it is to produce 50 Hz. and often is made to run at
1500RPM.

Turbines are not efficient at those low speeds so they are
operated at higher speeds and gearing must be used to
change the speed down to the maximum speed of the
alternator.

Is This Answer Correct ?    1 Yes 0 No

Post New Answer

More Electrical Engineering Interview Questions

WHAT IS INERTIA,AND WAT IS TORQUE.

0 Answers  


Why there is not any reactive power in DC although it causes magnetic field.

7 Answers  


i have installed my solar site of 6.7kw and is working perfectly , can somebody tell me that how can i measure my solar irradiation kw/day/sq m ?

3 Answers  


What is meant by Active and reactive power?

5 Answers   Siemens,


i ha done my 10th with 71% ,ITI with 81% 11th with 75% 12th 43% apprentiship with 71% in SAT i secure 1390 ,TOEFL 27 i was refused four times and in all me interview visa officar told that i am not Qualify for study in USA but i completed my 12th yes i got low persentage in my 12th but i seen to much student they already got visa with them 3 or 4 backlocs so why they are refused me ?

0 Answers  






l&t switch FN 63 handle position can we change

0 Answers   OPTCL,


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

2 Answers  


how to select rating of HT Panel

0 Answers  


What is the automatic voltage regulator with servomotor?

0 Answers   Simbhaoli Sugars,


What are the conditions to be satisfied for parallel operation of dc generators?

0 Answers  


What is the size of cable to be used for a Space Heater in UPS 160KVA of carrying 10 Amps current with 240 V ,1 Phase?

3 Answers  


Why use prefer Dc drive in place of Ac drive for kiln Operatio in Cement Plant?

4 Answers   Orient,


Categories
  • Civil Engineering Interview Questions Civil Engineering (5085)
  • Mechanical Engineering Interview Questions Mechanical Engineering (4451)
  • Electrical Engineering Interview Questions Electrical Engineering (16632)
  • Electronics Communications Interview Questions Electronics Communications (3918)
  • Chemical Engineering Interview Questions Chemical Engineering (1095)
  • Aeronautical Engineering Interview Questions Aeronautical Engineering (239)
  • Bio Engineering Interview Questions Bio Engineering (96)
  • Metallurgy Interview Questions Metallurgy (361)
  • Industrial Engineering Interview Questions Industrial Engineering (259)
  • Instrumentation Interview Questions Instrumentation (3014)
  • Automobile Engineering Interview Questions Automobile Engineering (332)
  • Mechatronics Engineering Interview Questions Mechatronics Engineering (97)
  • Marine Engineering Interview Questions Marine Engineering (124)
  • Power Plant Engineering Interview Questions Power Plant Engineering (172)
  • Textile Engineering Interview Questions Textile Engineering (575)
  • Production Engineering Interview Questions Production Engineering (25)
  • Satellite Systems Engineering Interview Questions Satellite Systems Engineering (106)
  • Engineering AllOther Interview Questions Engineering AllOther (1379)