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  1. PowerGenJim

    Oxygen and CO in GSU with no sign of overheating

    I read the post about oxygen in transformer oil. I am assisting a client with a GSU issue that sounds similar, BUT different. They have a >800MVA GSU with conservator, in service since late 2011. Looking at tests from 2015 thru last month August 2017, the unit has high CO (Condtion4 level of...

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