Shorted Armature

Growler (electrical Device)
... device used for testing insulation of a motor for shorted coils ... alternating magnetic flux set up by the growler passes through the windings of the armature coil, generating an alternating voltage in the coil ... This will induce an alternating current in the shorted armature that will in turn cause an alternating magnetic field to encircle the shorted armature coil ...