Abstract :
For the efficient operation, maintenance and testing of electrical equipment in complex a.c. systems, it is of fundamental importance to provide adequate transport and communication systems, a carefully selected and trained staff located at strategic points, and centralized control of all operations, and to enforce the strict observance of a suitable code of safety regulations. These points are emphasized in the paper. The maintenance of the various components of overhead lines and outdoor substations, which experience on the authors´ system has shown to be necessary or desirable, is detailed, and suitable intervals for such maintenance work are indicated. An analysis of faults is made for both the overhead lines and transformers on the system: the steps which have been taken, or which it is proposed should be taken, for counteracting them, are described. The predominance of faults due to lightning is emphasized, and the precautions which can be taken are discussed. Finally, the authors indicate what developments are, in their opinion, desirable to minimize maintenance costs and at the same time improve the reliability of electricity distribution, with special reference to the system with which they are concerned.
