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  1. Marco Antonio

    Settings the ONAF operation of Power Transformer

    Hello there, I have found the thermostats that control the fans. But, which will be the setting values? Is there any rule/standard? According to the IEEE C57.104-2008, greater values of CO2/CO implies cellulosic degradation due a over thermal. Our values are around 19 and 11. The year of...
  2. Marco Antonio

    Settings the ONAF operation of Power Transformer

    We have a power transformer with two stages of ONAF, it has two groups of fans. According to the results of the CO2/CO, the values are greater than 10, and It is suspicion of cellulosic degradation due a over thermal. I want to know, how to set the start of the fans. I want to decrease the start...

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