Abstract
The technology of an AC circuit breaker in Japan has been progressed aiming for size reduction, high voltage, and high reliability. At the result, the technology of an AC gas circuit breaker in Japan is high-water mark in the world. And, the gas circuit breaker has been adapted as the key component of the gas insulated switchgear and has been used to UHV transmission system.
On the other hand recently, it has been needed not only further more high reliability and high cost performance but also adaptability to environment. For an AC gas circuit breaker, it is very important to improve adaptability to environment.
In this paper, we observe about forward technology trend and assignment of the AC circuit breaker based on imposed duty and recent technology for the circuit breaker.
