Abstract
The electrical interlock logic for a complex high power switching station is presented and shown to be difficult to implement using conventional techniques. An alternative method of implementation, that of using a microprocessor to perform the interlocking function is proposed. The results of a feasibility study on this proposal are discussed and are shown to verify this application. Two methods of programming the interlock logic are described, the provision of both making the microprocessor system essentially self-validating.The paper is concluded by a summary of the microprocessor requirements in this application, especially operating time and memory.
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