KS C IEC 60269-2-2021 低压熔断器.第2部分:授权人员使用的熔断器（主要用于工业应用的熔断器）的补充要求.熔断器A至K的标准化系统示例
Low-voltage fuses — Part 2: Supplementary requirements for fuses for use by authorized persons(fuses mainly for industrial application) — Examples of standardized systems of fuses A to K