This standard applies to ac high-voltage (rated above 1000 V) generator circuit breakers which are typically installed between the generator and the step-up transformer terminals. Requirements relative to ac high voltage generator circuit breakers intended for use with generators and transformers rated 10 MVA or more are covered specifically. Generator circuits rated less than 10 MVA and pumped storage installations are considered special applications, and their requirements may not be completely covered by this standard. This standard does not cover requirements for ac high voltage distribution circuit breakers.
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