CHAPTER XXXII

ARMATURE TROUBLES

A large proportion of the mishaps and breakdowns which occur with dynamos and motors arise from causes more strictly within the province of the man in charge than in that of the designer. The armature, being a complex and delicately built structure, is subject in operation to various detrimental influences giving rise to faults.

Many of the faults which occur are avoided by operators better informed as to the electric and magnetic conditions which obtain in the running of the machine, especially the mechanical stresses on the copper inductors due to the magnetic field and the necessity of preserving proper insulation.

The chief mishaps to which armatures are subject are as follows:

1. Short circuits;

a. In individual coils;

b. Between adjacent coils;