额定电压220kV(Um=252kV)交联聚乙烯绝缘电力电缆及其附件 第1部分:额定电压220kV(Um=252kV)交联聚乙烯绝缘电力电缆及其附件的电力电缆系统—试验方法和要求
Power cables with cross-linked polyethylene insulation and their accessories for rated voltage of 220kV(Um=252kV)—Part 1:Power cable systems—Cables with cross-linked polyethylene insulation and their accessories for rated voltage of 220kV(Um=252kV)—Test methods and requirements