家用和类似用途的交流排气扇及其调速器

[中文适用范围]： 适用于由连接至不超过250V的单相交流电路的功率不超过500W的单相交流电机驱动的换气扇（例如壁扇、窗扇、厨房扇）。规定了性能和相应的测试方法。包括 [外文原描述]： Specifies the performance and the corresponding methods of test of ventilating fans for household and similar purposes intended for air forcing and exhaust, not exceeding 0.5 m in size, driven by single-phase a.c. motors having a power consumption not exceeding 500 W (including any associated regulators), for use on single-phase a.c. circuits not exceeding 250 V. Applies to ventilating fans such as wall fans, window fans, kitchen fans, etc.