Abstract

Redundancy in design of industrial power distribution system reflects the goals of service continuity and improvement of service reliability. However, this results in higher initial cost. A possible means of analyzing costs vs reliability may be reliability analysis which may offer a cost-reliability trade off decision affecting design. In this paper, a set of general equations developed at The Ralph M. Parsons Company is presented for use of computing the failure rate of a redundant system with any given number of identical units, some of which are necessary for successful operation. The remainder are redundant. From the obtained system failure rate, system reliability and system availability can be determined.

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