Energy consumption grading for industrial electroheat installations—Part 33:Mains frequency coreless induction furnace
全国工业电热设备标准化技术委员会(SAC/TC 121)
GB/T 30839的本部分规定了工频无心感应炉（以下简称“工频无心炉”）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。
本部分适用于没有变频装置，直接使用工业电网频率50 Hz或60 Hz电源供电的无心感应炉。
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