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  • Users: MatthewDB
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  1. MatthewDB

    The google expert

    I'm curious how you people who would deal with the google expert. I have a peer who is an engineering manager, and he often will google something and then believe what he comes across. Shocking, I know, but often what you find on the internet can be wrong. And when you get to a technical...
  2. MatthewDB

    Collision Near China Leaves Iranian Oil Tanker in Flames

    Link Maybe it is just more reporting, but it seems that there are more collisions recently. It will be interesting to see how this one plays out, along with the politics of who gets to investigate.
  3. MatthewDB

    Y connected auto-transformer for 600V or 690V to 480V

    Hello, We produce a power electronic converter that operates at 480V 3ph input. The device is 3 wire only, no neutral connection. For operation on 600V and 690V systems we utilize a 3 PH auto-transformers. The auto-transformer is integrated into the same enclosure, so it falls under our UL...
  4. MatthewDB

    Making a corner in sheetmetal for a dust tight box

    We're working on packaging an industrial product where we will have to meet UL Type 12 and IP54. I've seen some products where they have made the enclosure out of gasketed sheet-metal without welding. One place we have trouble with is getting the corners to seal up without resorting to...

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