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GCB hitachi abb power grids testing wika

Generator circuit breaker GCB define and summarize history ...· Generator circuit breakers are breakers applied at a rated voltage matching the rated voltage of a generator in medium voltage system after generator.They are located between the generator and the step-up transformer. In the 1960s generator circuit breakers were developed for the higher power ratings. Air blast technology was used, and the GCB s were …

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