Answer Posted / shambhu sharan prabhat
Suppose generator is synchronysed with grid and is
supplying power to the grid. If suddenly turbine trips and
gcb of generator does not open then there wil be reverse
flow of power from grid to generator stator windings as
generator will be on low potential side.Generator will now
act as induction motor and therewill be a heating of rotor
end rings and wedges damaging the rotor windings also.
Considering turbine, as stop valves are closed and there is
now no cooling media (steamflow ) for rotaing turbine at
synchronous speed there will be overheating of blades
causing damage to last stages of turbine.
| Is This Answer Correct ? | 14 Yes | 3 No |
Post New Answer View All Answers
Has someone here done a sizing for a generator (3 phase), its for a pumping station. If you have an example for standby/duty and both running (I) star delta (ii) Soft Starter.
what is parellel power factor correction?
Is a direct shorth ciruit on a branch MCCB in a Low Voltage Switchboard a correct means of tesing the performance for discrimination?
plz send me HPCL apptitude paper.. maulik_elect@yahoo.co.in
with 3 phase board on a 63 amp rcd is it ok to have 6 electrical showers 2 on each phase and what problems could happen
please send me jindal previous aptitude and technical question and answer.my email id is deep_raj@live.com
What is meant by reset level of the relay?
Name one of major transformer company in KSA ?
Is it possible to implement Restricted Earth Fault protection for a transformer without neutral CT?
i applied for the ap transco please forward the freqventley asked QA
how net resistance islow in star connection and viseversa in delta connection...? if anybody could explain in detail it wud be helpful.
How to know vacuum in vacuum cylinder of breaker in working condition
What is class ab operation?
What are the specifications for conducting earth leakage test as per IEC standard?
hi frnds...pls send me aptransco previous papers .....pls..pls,,,(madhar.rocking@gmail.com)and suggest me some websites
