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Si Series Bench Tests: Rotor

  1. Set ohmmeter on "x1000" scale and check rotor windings for grounds. See Fig 1. Connect one ohmmeter lead to rotor shaft and second lead to each slip ring. Resistance should be infinity. If not, replace rotor.
    Fig 1: Bench Testing Rotor for Grounds & Opens
    G25069
  2. Set ohmmeter on "x1" scale and test rotor for opens. Connect an ohmmeter lead to each slip ring. See Fig 1. Resistance should be 2.4-3.5 ohms. If not, replace rotor assembly.
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