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and about the diameter of the shaft?? I know i ask a lot of things, but i got a problem and the guys from the mechanical department says that everything is ok...

i agree with you... and I know that theory, but in example, if i see a excentricity due to a bad mounting process between shaft and fly wheel, in example 0,6 mm, how could this affects the bearings? vibrations? the question is: no balance, and a bad mounting process... (the fly wheel is not at...

how could i show this guy he´s wrong without test it on the generator....??

on other side... i want to know your opinion about the fact that the shaft is 180 mm diameter in the side the fly wheel is mounted...could somebody tell me if this diameter is ok for a inertia (I) of 404 kpm^2

i thought it, but the mechanical guy tell me that it´s no needed cause it´s a machined piece...of carbon steel, and it´s exactly the same all the piece....

i got a flywheel, with dimensions: diameter:1530 mm weight: 1335 kg and wide: 90 mm the speed of rotation is 1000 rpm... the question is does i need to balance the fly wheel?? could somebody explain me why?

yes, this is specially done units...not standard, and the problem is exactly on the two units... and the hottest sensor is on the thrust bearing on the side of the turbine, and the temperature is 85 ºC, with a load of 20Kn coming from the turbine, ( I can´t measure it, but the graphics says...

ok, i got two hydro generators sets,the data are: RPM: 1000 Turbine: Francis horizontal type of the bearings: zoellern generator: INDAR weight of the rotor: 2500 kg this generator is a francis turbine with a horizontal generator with two slide bearings,(zoellern bearings), one on the non...

thanks you all of you, about the basic measurements as megger and equality of the currents, all this have been done.... I have to say something, in example for jraef, i agree if you don´t use enough voltage, the rotor stay in the locked position, but...the rotor start to turn.... going from 0...

Hello, I got a problem on a propeller electrical motor, the name plates of the problem are the next: -1000 HP - Vertical motor, it´s posible to turn it by hand. - 780 rpm 60 hz 440 V 1260 A full load. - The propeller is a pitch control one, but when we start the motor is on the 0 position. Now...

It´s a syncronous generator, 1000 rpm,1000 kw, cos 0,9, and the regulator is a basler decs 125....and the turbine is a Kaplan one..... does somebody knows something about the cleaning of the generator flux????

hello, here´s Jose from sunny Spain, and I got another question relative to the generation thing... I got one generator 1000 kw at full output power, and after ten hours more or less, the output start to decrease, and stay on 960 kw.... The customer tell me that in other power plants...

oh yeah, thanks for the replies to all of you... a new question related to this theme,... what´s the size for the standards for definition of the number of startings, and how the standard define it.... could somebody give some adress to see it... on other hand, Lionel, the motor will not...

now I have a new question, how will the relay see the thermal model of the motor?? the relay signals are only RTD information.... and if the rotor is hot and the mechanical forces of the the starting breaks the bars, how does the relay knows it??? I´m not more into the relays for motor...

thanks david, but you said three times, is there any place where it´s writed... on Nema, CEI..... ISO???

hi, I got a problem on a 6000 V, 1,5 MW generator, the RTD on phase U is broken and I´d no spare installed, I´m thinking on install a new one on the head of the winding... the winding is a wire winding....my question is if somebody knows what´s the diference on º C, of the RTD in the slot and...

again sorry for my english.... I have to do a commisioning work on a asyncronous motor of 2 Mw, 6000 V, 425 rpm... pump application, and I was worried about the times I can start it up, cause the manufaturer tell me that I can start it three times on a hour, but I think it have to be a time to...

hi, there to all the people from eng tips, the bearing are the two C3 type, and no special diferences between them.. and the drive end is a located one( fixed radial and axial).... and the non drive end is more free in order to let it grow cause of the heat. I try to get a clarification from...

hi everybody, I think all of you didn´t understand the thread... this is a motor with the next: - three phase wind on the rotor. - three phase wind on the stator. - 1 encoder on the shaft. The way we use to work with it on the wind farms, is the next: - First moment to start to generate, you...

no insulated bearing, the bearings seens to be the same kind... but differents factories.... and it´s for a wind farm and it´s supposed not to be high thrust load. and is a diference between the two bearing to support the thrust load???