Analysis of Characteristics of Low Voltage Circuit Breaker by External Magnetic Field

Recently, as interest in eco-friendly distributed power has increased, studies on the improvement of performance breakers such DC and reliability existing AC have been actively conducted. To improve these breakers, this paper conducted analysis characteristics a low voltage circuit breaker using an external magnetic field. In experiment, before current-zero point, cut-off time to is shortened after re-ignition, which associated with reliability, suppressed. According experimental results, short-circuit show significant difference 0.13 ms t21 section, dielectric recovery strength shows 13.3% latter half DRV (dielectric voltage) V-t curve. This result meaning because it can be easily improved under control Hence, applied interruption through detailed research future.