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hie, we have two turbo-alternators installed in the 50's and every time when we want to do brush gear maintenance it is always off load. we have realized the disadvantage of doing this and we are thinking of modifying this excitation system to a system were we can do on load brush gear...

hie, what auxiliary equipment should be left running on a turbo-generator to protect the turbine that may need power from a standby diesel generator? thanks

scotty, other industrial large a.c motors use a star delta starter whereas a motor of the same size is connected direct online in a power station.

why are starting devices used extensively on large a.c machines in most industrial establishments but to a much lesser degree in power stations? thanx

hello, how are bearings insulated on some machines and why is it neccessary?

what is synchronous and subsynchronous content of voltage and current?thank you

what are the causes of a circuit breaker failing to trip? thanx

what are the dangers of running a 60MW generator with an unclean stator and rotor. the stator and rotor is contaminated with coal dust. also is it possible to clean the stator with the rotor inside? if possible what method of cleaning can be used to clean the stator with the rotor inside? thanx

hello, how do you rewind an electric motor and what equipment is used to do that? thanx

hello, what are the causes which lead to motor supply cable to fail or burn?

hello there, how do you prevent water carryover into turbines(steam turbines)? what kind of electrical system can be installed to prevent wet steam into turbines? thanx

hello there, what causes generator brushgear to spark and the rotating exciters to burn? what do you recommend to overcome these problems? thank you for your help!

why is it that the generator remains at synchronous speed even if you add or decrease amount of steam to the turbine, but the MWs change??

hello there, how does an earth fault on generator feeders cause load rejection? thanx for your help

thanks skogsgurra.

7anoter4 thanks for the help. can you help me with the specs of the rectifier transformer considering the technical specifications of the voltage regulator below. OUTPUT VOLTAGE 50KVA at 600V WINDING Auto FREQUENCY 50Hz TYPE R090/150 RATING% 100 INPUT VOLTAGE 380V OUTPUT VOLTAGE 600V the...

how do you calculate works power utilized by boiler auxiliaries and determining the optimum value to maximize the energy sent out. the boiler are those for thermal power plants

can someone help pliz. our ESP's are sturtevant type used for gas cleaning at an old thermal power station. we have a mechanical rectifier driven by a synchronous motor to provide unidirectional current to the electrodes. the mechanical rectifier is fed by a power transformer secondary winding...

i kindly seek advice concerning the principle of operation of mechanical rectifiers used for electrostatic precipitators.I have been searching everywhere but to no avail