This compressed-air mechanism has been developed to answer the requirements of a simple and reliable stored-energy mechanism. By arranging this mechanism to be pneumatically trip-free, it has been possible to get the high-speed operations required of modern oil circuit breakers. The mechanism has been tested under severe operating conditions to insure trouble-free performance. Timetravel curves show satisfactory characteristics for closing, tripping, trip-free, and instantaneous reclosing operations. The absence of synchronized mechanical motions and critical mechanical adjustments contributes to a reduction in maintenance and will add to reliable operation.
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Linde et al. (1944) studied this question.
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