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Vacuum circuit breakers allow trains running in AC sections to turn on and off current from overhead contact lines. Those are periodically removed from cars for maintenance, but that work takes time and effort. We thus reviewed the internal structure and external cylinder of vacuum valves inside circuit breakers and improved the structure of the mechanical part. Based on the result, we are developing new vacuum circuit breakers that reduce the number of times maintenance is carried out while maintaining the reliability of the devices. |
