Field Coil: Testing and Inspection

Testing Field Coils For Grounding:

FIELD COIL OPEN-CIRCUIT TEST (Direct Drive Type Only)
Check the continuity between field brushes. If there is continuity, the field coil is in order.

Testing Field Coul For Grounding:

FIELD COIL GROUND TEST (Direct Drive Type Only)
Check the continuity between field coil brush and yoke. If there is no continuity, the field coil is free from grounding.