Recent content by Michael White

  1. M

    Massive damage. Neutral fault

    The building is fully BMS operated. There is a valid reason, for which I can’t fully divulge as the electrical contractor may well be part of this community and I would assume there is a large finger pointing exercise about to commence. We’ve checked the drawings and it should have only been 3...
  2. M

    Massive damage. Neutral fault

    My last post was written just as you were posting this. It most certainly wasn’t any form of late break early make. Just a bog standard 4 pole contactor.
  3. M

    Massive damage. Neutral fault

    I’m thinking just the action of switching the contactor may have meant that not all 4 poles closed at the exact spilt second and might have cause massive overvoltage in the phases. Or the neutral was open circuit for a time leading to anywhere up to 415v applied in the phases. I wouldn’t say...
  4. M

    Massive damage. Neutral fault

    The contactor is for BMS control for energy management. I should have mentioned the contactor went faulty yesterday and one of the poles was open circuit and perhaps a slack coil supply as it was dropping in and out a couple of days ago.
  5. M

    Massive damage. Neutral fault

    I work for an FM company, we’ve just taken on a brand new refitted and rewired premises. There is a 3phase DB supplying sockets into which there were loads of electronic equipment which has suffered multiple failures. The DB is supplied via 4pole contactor which is switching the Neutral. It’s a...

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