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Free wheeling diode and contactor's contacts

  1. May 30, 2012 #1
    free wheeling diode for protecting contactor's contacts..in locomotive
    Is the free wheeling diode can protect the contactor contacts from opening sharp spark?
    The contactor is used in power circuit of dc series motor..
    We always change these contacts bcuz they aging the sysetm consist of six dc motors used in locomotive
    Last edited: May 30, 2012
  2. jcsd
  3. May 31, 2012 #2


    User Avatar

    Staff: Mentor

    That's the general idea. The diode reduces the voltage produced when the current is interrupted.
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