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  1. bennyvw

    Should motor contribution fault currents be considered in protection coordination studies?

    Thanks everyone for the replies! Gr8blu - Assuming that this fault is on a separate feeder to the lumped load, I assume the lumped load / motors would still be energised (although with a reduced bus voltage) and rotating. Is this how the sustained motor contribution occurs?
  2. bennyvw

    Should motor contribution fault currents be considered in protection coordination studies?

    I'm currently modeling my 11kV distribution network in ETAP with a number of lumped loads representing the large motor installation base at the site. As part of my protection coordination study I've found that some of the feeder protection devices are tripping as a result of fault currents...
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