Energy consumption grading for industrial electroheat installations—Part 31:Medium frequency coreless induction furnaces
全国工业电热设备标准化技术委员会(SAC/TC 121)
GB/T 30839的本部分规定了中频无心感应炉（以下简称中频无心炉）的能耗参数、能耗范围、单位电耗等级划分及其指标和测定方法。本部分适用于工作频率高于工频50 Hz，低于或等于1 000 Hz，额定容量在1 t~60 t范围内，由中频半导体变频装置供电，熔炼钢铁、铜及其合金和铝的无心感应熔炼炉和铁保温炉。
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