Bench Testing: Rotor
Check rotor winding resistance across slip rings with ohmmeter and insulation between slip rings and rotor with test lamp. Replace rotor if grounded or if resistance is greater than 4.4 ohms.
Check rotor winding resistance across slip rings with ohmmeter and insulation between slip rings and rotor with test lamp. Replace rotor if grounded or if resistance is greater than 4.4 ohms.