Hi, our Main Generator (132 Mw - Ercole Mareli 13.8 Kv) has a problem in the brushes. The collector ring has 11 brush per side. (positive and negative). We had a high desbalance with each current´s brush that causes overheating and damage. recently we buy new brushes (Alstom - OEM Generator) but...
we have installed a 90/120/160 MVA Power Tranformer, 65 oC rise temperature. We have two groups of radiator, each one with 8 fans.
This 16 cooling fans which start, one part (8) in the first lever of cooling and second part (6) in the second level of cooling together with 2 oil pumps (one upper...
I have installed 12 RTD on the 133 Mw Generator stator winding, 4 for each phase. At the time, we have 4 damage. There`s another way to get a realistic value of the winding temperature, by other electric parameters calc???.
Im afraid that we must open the generator, and take off the RTD damage...
HI,
Please somebody can said to me, where i can find information about ABB Unitrol UNS3020, for Protection the rotor of generator against earth faults. I couldn`t find in the web. We want to test it
Thanks.
I have a 160 MVA 138KV/13.8 Kv transformer. I see that the valve between the tank and conservator, is 20% open. The Company who installed the transf. left it that position, because the transformer shutdown when energizated, by the buccholz relay operation. (with the valve open 100%, normal...
