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  1. Golfex

    Neutral CT sizing

    Hi all, In a substation in Europe we have a YD transformer with the neutral solidly earthed as per the picture below. The transformer is a 155/66 kV 160 MVA. How can I calculate the primary rating of the Neutral CT? Thanks in advance for your help.
  2. Golfex

    Increasing MVA Without Fans

    Good discussion here about transformer sizing. I have another question regarding the fans and its corrosion when installed in marine environment (offshore platforms). Is there any solution of fans with low maintenance and a long lifetime?
  3. Golfex

    False feeder trip

    Hi, Thank for your replies. If it is the case RRaghunath describes, why a third string feeder, Feeder 3, connected to the same 33 kV bus didn't had same behaviour than Feeder 1 and didn't trip?
  4. Golfex

    False feeder trip

    Dear All, Could you please mentioned the actual reason of the following false tripping of one healthy feeder due to a single line to ground fault on the adjacent feeder. Details are as follows: Both feeders are being fed from the same bus 33KV feeding each one one string of an offshore wind...

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