unclebob
Thank you. Yes it´s in the outside, is a Pad mounted Distribution transformer, 6900 Volt to 400 Volt 225 KVA. We add new oil and the rise of temperature still there.
edison123 70°C with no load to the transformer. When i connect a load, 40 KW, the temperature rise to 80°C. I think is a litle high, but the cooling oil is good and by another hand the Voltage is balanced between phases and neutral and between phases. If a problem in the coils, for sure the...
"prc" Thank you. No radiators on this transformer. It is a pad mounted transformer and the cooling is made by convectionhttps://files.engineering.com/getfile.aspx?folder=de936c07-9769-4202-89f8-c6beddc48a02&file=007560824_1-7a3f5d7a61d2014e7960e88d5b96c38f-360x466.png
Hello, i am new here and i need help.
I am working on a 6900/400Volt, 225 KVA transformer, with 10 years of use, that feeds a pump house with 8 frequency drivers for 8 motors. This installation don´t have any filters for harmonics, caused by the frequency drivers. Our transformer is oversized...
