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Recent content by draffy

  1. draffy

    Motor connections and currents

    Many thanks to jbartos Your explanation was very good - just what I wanted. You cleared up several items - star is 1/3 delta current (for the same motor) - a motor power rating is for either star or delta, not both - the formula I gave applies to either star or delta I work for consulting...
  2. draffy

    3 phase y connections

    If it is Y connected (check the nameplate for the voltage you are using) then there will not be a low and high voltage connections - it can be connected only one way. If the machine is belt/chain driven, remove the belt to test - if it runs backwards, it might damage the machine. There could be...
  3. draffy

    Motor connections and currents

    Can anyone help with the following questions. We use a 400V 3-phase power system. Can anyone please give me the formula for calculating the line currents taken from the starter for a 3-phase motor if the same motor is connected in (a) star/wye connection (b) delta connection The common formula...
  4. draffy

    rcs fonts into Autocad 14

    Is there any way when exporting a dgn file to dwg that the rcs fonts in Microstation can be read by AutoCAD 14 without changing the font properties? Also how can I see attributes when opening dwg file in Microstation e.g. drawing numbers, titles etc??

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