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Kevin, Regarding table 4: I share your understanding of the guide; exceeding the limits in table 4 can lead to permanent damage but when operating within the limits of table 4 the relative aging calculations apply. Rgs. Jens

Kevin, The following should be considered when reading the Loading Guide: 1) The loading guide assumes that the transformer's life is determined by failure modes based on chemical reactions. This is true for many of the important failure modes, e.g. paper degrading, but not true for some other...

Hi everyone, Please assist me understanding a transformer rating plate. I don't understand the symbol encircled with red on the attached image. Could this be a symbol for the OLTC shaft? A neutral CT? Does anyone know? Thank you in advance for your assistance.

In addition to what has already been said, the nameplate of the transformer might have the answer. If the nameplate sais wye-delta connection, you only have 3 outgoing cables and the voltage between any 2 of them is 380V. If the name-plate sais wye-wye connection, you can have 3 outgoing cables...

Dear Swagger I work for a company using this KKS system (Kraftwerk Kennzeichen System). I think that companies have to write their own "Bibles" (thats what we did) following guidelines of standards like IEC 750, DIN 40719 Part 2 and other IEC and ISO standards. For effective and...