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Recent content by Coll

  1. Coll

    Explosion proof Equipment

    Are you located in the EU ? If the project is located within a country that has adopted the AtEx directives into national legislation (I assume that that is every EU country barring the most recent accession states) then there is a legal requirement to use only AtEx certified equipment. I’m a...
  2. Coll

    General question on primary / secondary selective networks

    Over the weekend, I was asked if I was interested in getting involved in setting up a network that would operate as follows: - Primary Voltage 10kV / Secondary Voltage 400V. - 4 substations each approximately 250metres apart. (four corners of a square). - Network primary AND secondary selective...
  3. Coll

    Wye-Delta Starting Under Load

    Guys - Many thanks for the input, Colin
  4. Coll

    Wye-Delta Starting Under Load

    I have been asked to size a generator to start two 75HP motors at star-delta(wye-delta), starting on-load and at the same time. The machine is a wood-shredder so I assume that there is a high starting torque requirement. It seems to me though that a star delta start (with open transition)...

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