From my opinion, if you megger and do IP, and measure of resistence..... and do a trend each year.... you´ll see how insulation goes.... and maybe this is enough... i remember Leroy used to varnish generators with VPI system, I think maybe you have to see visual things like, the lost of magnetic...
Ok, like user I have to say EDA, is a good tool but too much expensive if you only wants to check one generator or two.... in this way best thing is to subcontract... and yes, sometimes I see EDA find problems like short turns in the rotor... and the most important thing, it´s a good way to know...
hi, i´m technician from Indar Electrical Machines in Spain, and we use EDA, for testing generators... and near Portugal there´s other companies like EMENASA in Vigo that they could help you. If you are interested I could tell you the typical testings for this machines, our main market are this...
yes, it´s on the rotating diode plate, and i don´t know how to size them and as it´s a generator i have no good relations with the manufacturer, cause some faults in the commisioning i can´t ask them.
thanks.
I got a syncronous generator, and the varistor blow up, and i don´t know the value of the new varistor.... the generator is 2100 KW and the voltage of the stator is 3000V how to select it? i think dynamic resistence is important,
thanks a lot
yes, the normal stop will be with the driver... but this is for braking for safety reasons.... and this is a propeller that moves a little ship.
thanks a lot.
the motor is a 100 kw syncronous permanent magnet... and the voltage will be 400 volts... 24 poles... I still wondering how much power i´ll need in the resistance.. other idea is to take 2 phases rectify it and put in the other phase and in other of the phases i rectify... what do you think...
sorry, but what is BEMF?? and the power? cause as this will have a short time brake.. maybe this resistence taking the peak phase voltage/sqrt 3 / maximum peak current.... is for continuous braking in the theorical way that this values is no decreasing.... sorry for my badly english.
I´ll use a propeller with permanent magnet syncronous motor.. and i´ll like to brake with short circuit resistence...how could i define the value of the resistence? I think the value must be determined by the inertia of the load and the magnetism of the rotor...but i´ll like to know if it´s...
hi, i had read in a manual (Marelli generators, Italy) that they talk about generators heating to take out humidity on the oven, and you´ll see a trend... and recomendations, in example, measurements of isolation each hour... and you´ll see, the trend of insulation rise and after some time...
the problem is: i measure in the medida cogeneracion 1 in example pf 0,96, but i read on my device 0,93...and i was wondering if this problem is cause some saturation or deformation of the sine wave coming from the CT. Yes, capacity of the generators is 1860 kw but if you use them on 0,93 pf...
