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  • Users: proprot
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  1. proprot

    Fan Calculation

    Hi I am trying to calculate if the fan I have installed at a particular site is to large. The dimensions of the room are 4.7m x 3.0m x 3.1m that gives me a total volume of 43.71m^3 the inlet size of a single louvre vent into the room is 0.500m x 0.400m that gives me an inlet area of 0.2m^2 the...
  2. proprot

    Directional Overcurrent and Earth Fault Protection

    Hi I have a one or two questions that I would like some clarity on regarding protection using directional overcurrent and earth fault protection. 1. When using a 90°-30° characteristic (30° RCA) why is it recommended that the relay is used for the protection of plain feeders with the zero...

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