Rotor Resistance And Ground Test (Dynamic - Lincoln Electric RED-D-ARC DX450 Service Manual

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ROTOR RESISTANCE AND GROUND TEST (DYNAMIC)

(Also referred to as flying resistance test)
Service and repair should only be performed by 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 checks for faults in the rotor winding, while these windings are being stressed by
the mechanical forces encountered during normal operation.
MATERIALS NEEDED
Miscellaneous hand tools
Ohmmeter Analog type meter (required for dynamic resistance test)
Wiring Diagram
Note: This test is best performed with a good quality analog type ohmmeter. Many digi-
tal meters will not provide stable or accurate resistance readings while the rotor is spin-
ning.
TROUBLESHOOTING AND REPAIR
WARNING
DX450
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