We have a synchronous motor 3250 kW with brushless exciter with rotating diodes. The power resistor ~4 ohmi from rotating part must be replaced. I don't know the manufacturer. Anybody know a manufacturer of such power resistors fitted on the rotating part?
We have a 60 MW hydro-generator to be put into operation soon. I work on the design side and have a tests program for the generator. It is required that the generator can also operate in a synchronous compensation mode. I know the procedure. The water is removed from the turbine and the machine...
We have an hydro generator with static excitation system. There are 14 brushes on one ring, so the problem is how can remove dust from these brushes. The excitation current is 1150 A.
I want a simple solution. Is anybody which can help me?. Thanks is advance.
I searched in the net material for fast de-excitation brushless exciter, but is there anyone who knows more about this subject and if he saw somewhere applied this operating mode.
Thank you.
I have several questions about the brushes that are used in hydrogenerators. I'm not referring here to those for static excitation but those that are used for protection and measurement. How many brushes of this type are used? It is a brush that makes contact with the machine shaft, is mounted...
To protect hydrogenerators bearing it is used shaft current transformer installed around it and a relay attached to the transformer.
I looked at various companies but I did not receive any answer. My question is if you can provide me the names of companies that produce these transformers and the...
We have an hydrogenerator with followings technical data; 16000 kVA, 6.3 kV, I stator=1466 A, n=500rpm., m=3 phase, R stator=0.010 ohm, GD2=85 tm2 and we want use electrical braking system by the short circuit method. When I calculated the time for braking the generator I found t=870 sec.. In my...
It is a relation between the current in the hydrogenerator shaft and static excitation system?
I know that this current can destroy the isolation bearings.
Is someone who knows more about this?
