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sf6 Load break switch abb power consulting micro water enervac

Transformer Failure Due to Circuit Breaker Induced ...· Limited space on the low-voltage side prevents installation of a secondary main breaker to mitigate the arc Flash issues. Retrofitting a vacuum circuit breaker in the primary of the unit substation, in place of the primary load break switch, and sensing on the secondary is a solution that provides both primary and secondary fault protection [5].

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