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Recent content by PowerGrad

  1. PowerGrad

    Disconnectors

    Oh also from looking at fault data and elsewhere I am thinking that the main faults on a disconnector are: 1)broken insulators 2)contacts not making well - eroded etc 3)hot spots 4)mechanism not functioning well
  2. PowerGrad

    Disconnectors

    Thanks for your reply overvoltage.Yes I am talking about disconnect switches. Our main criteria are as follows: insulators in a bad state, eroded contacts and current path, mechanism not working or motorised operation not functioning. How does that sound to you? Yes the maintenance and spare...
  3. PowerGrad

    Disconnectors

    Currently I am looking at replacement criteria for Disconnectors. Many people want the disconnectors replaced in their substation but I am not always sure why. For example, it seems that Hot Spots are usually caused by dirt - so why should a disconnector have to be replaced because of them? What...
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