Armature Coil

ARMATURE COIL


1. Check the armature coil for short circuit as follows:

Armature Short Circuit Test:

2. Set the armature in a growler.

CAUTION: Clean the surface of the armature thoroughly before performing the test.

3. While holding a thin strip of iron against the armature in parallel with its axis, turn the armature slowly. The armature is normal if the iron strip is not attracted to the armature or it does not vibrate.

Armature Coil Grounding Test:

4. Check the insulation between commutator segments and armature coils. The armature coils are properly insulated if no continuity is present.

Armature Coil Open Circuit Inspection:

5. Check continuity between a segment and another. There is no open circuit in the tested coil if there is continuity.