volume 10, issue 2, P659-665 1995
DOI: 10.1109/61.400866
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Abstract: This paper discusses die goals of routine maintenance testing for protective relays. The paper advances a Markov Probability model diat predicts die optimum test interval for protective relays widi and widiout self-testing capabilities. The model uses known system transition rates and relay failure rates. The probability model shows diat die optimum test interval for a relay widi self-tests is quite long.Digital relay failures can also cause relay misoperations and prevent operation for faults. However, relay …

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