Component Testing: Rotor
- Check rotor coil for continuity. Check to ensure that there is no continuity between slip rings. If resistance is too small, it means that there is a short circuit. Standard resistance value is 3-5ohm. If there is no continuity or if there is a short circuit, replace rotor assembly. See Fig 1 .
- Check rotor coil for grounding. Check to ensure that there is no continuity between slip ring and core. If there is continuity, replace rotor assembly. See Fig 2 .