The Diseases Of Electrical Machinery 1904
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THE DISEASES
OF
ELECTRICAL MACHINERY.
CHAPTER I .
CONTINUOUS-CURRENT MACHINES.
For our purpose we may divide the different faults
which occur with continuous-current machines into :
1. Breakdowns in the armature.
2. Faults in the field magnet winding.
3. Faults in the regulator and the starting
resistance.
Breakdowns in the Armature.—We will com-
mence with the faults which may occur in the
armature. These may show themselves either by a
more or less heavy, but at any rate an abnormal,
sparking at the commutator, or by unusual heatin
of a part of the armature, or by the machine refusin
to generate any current; or finally, in the case of
motors, by the motor refusing to start. There are,
however, some other faults which, although they come
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