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
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...
If i got a current transformer rated in example for 200 A and I put through it 250 A, what would be the sinuidal wave, is it possible to get some error in the angle?.
This question is cause, my company manufacture a device that works with the power factor, and we mount in a factory, it works...
we got an 160 rpm aprox. generator, 18 MW, manufactured two years ago with resin rich insulation, and the machine was stopped in the hydro power plant 1,5 years, after this we measured insulation....it was in the beginning low, less than 100 Megas, after we swicht on heating resistences, the...
I got a 1700 kva generator and i got a dec 125 avr, we have C curve circuit breaker and trips, the thing i want to know if i could expect a trip from the magnetic side of the circuit breaker... cause of the inrush current?
hi, i know this is not an usual application, but i hope somebody could help me... this is a generator on a PTO output of a propeller gearbox.. onto a vessel, cause of the rise of the petrol, each guy wants to save their money as much as they could.. for this, they think about to reduce the...
i have to mount diodes on one generator rotor, and i remember some years ago to use some king of paste to mount them... to help to get a good contact areas between diode and plate..does somebody knows some manuefacturers of this paste
spanish regulations, make me produce inductive power (over excited generator) when the grid is weak, and I got a low voltage group 1350 kw, and i start to control power factor, changing depending on the hour to satisfy the requirements of the grid ( in order to get more money from them)...and...
I want to encapsulate a electrical winding to use in salt water....but i don´t know the kind of composite or resin i´ll need, could somebody help me, cause this is not my thing... i was worried about, the diference on the thermal exparsion, about cracking...cause stator is for class F isolation...
i need the magnetic characterist of carbon steel F-111, cause i´ll like to use in a motor with permanent magnets....
thanks in advance, for some links to this information
i got a generator with the next excitation: 35 V dc and 8 A dc, and i´m looking for the transformer that feed power to the dec200, i was thinking on use a 660/120 V transformer but i wonder about the VA needed?
how do you see my calculations?
Excitation volts at full load: 35 V
Excitation...
hi, i must do a cleaning on a 8 MW leroy sommer generator, and the guys send me a report of a thermographic of the generator, showing some hot spot in the head of the windings, they said that is a corona effect problem.... how do you see, does corona effect causing this hot spots?
on other way...
This bearing is a thrust bearing on a horizontal hydro unit, francis turbine the firm is Voith hydro, this bearing is composed by an axial bearing that support the force of the turbine on their way of aspiration, an other axial bearing that suport the rejection of load effect and a radial...
I got a power transformer 2500 Kva between a circuit breaker to the grid and a generator (step up transformer) and I want to know typical values of reactive power for diferents states of load, in example...full load...75 % load, the volts are 6000/20000 V, and is Y/Delta....thanks in advance
hi everybody on this new year, i hope all is ok, I got a friend that ask me a question about a little motor he gots on his office, it´s a syncronous stepper motor, this is writed on the nameplate of the motor, and it´s feed on 240 V ac 50/60 hz, and it gots three cables for conection, they are...
i see last week a caterpillar gen set, with a digital regulator ( it gots a display) does somebody know where i could find information about this regulator.... i mean some data sheet and specially some manual.
I got a question about the calculation of shrt circuit current, I got a salient poles generator with X`d and X`q, how i could use it.. in example: the reactance base is 18 ohms, and X`d is 20% and X`q is 25 %, the voltage is 6000 V, how do you take into account the reactances. Do you sum?
