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F-55F-55

TROUBLESHOOTING & REPAIR

STATOR SHORT CIRCUIT & GROUND TEST

WARNING

Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may result in danger to the technician or machine operator and will invalidate your factory warranty. For your safety and to avoid electrical shock, please observe all safety notes and precautions detailed throughout this manual.

If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical trou- bleshooting assistance before you proceed. Call 1-888-935-3877.

TEST DESCRIPTION

This test will determine if there are undesirable electrical connections between the stator windings and chassis ground, or between individual windings within the stator.

This test should be performed if flashing voltage is present at the rotor slip rings, Rotor resistance, field bridge rectifier, field capacitor and all associated wiring are proven to be good, but the stator output voltage fails to build-up to normal levels, or is too high in one r more, but not all, of the windings.

MATERIALS NEEDED

Miscellaneous hand tools

Ohm meter

RANGER 305D

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Lincoln Electric SVM175-A service manual Stator Short Circuit & Ground Test, 55F-55