宝钢的中央变电所和受电变电所采用的六氟化硫开关装置(国内还处在试制、试用阶段),采用六氟化硫(SF6) 气体作为绝缘介质。与空气相比,SF6具有较高的绝缘强度(约为一个大气压下空气绝缘强度的2倍),灭弧能力高(在升断电流时,约为空气的100倍),冷却性能好,负荷电流约是对应空冷的1. 25倍。SF6在发生电击穿时几乎只与电极 Sulfur hexafluoride switchgear used in central substations and power receiving substations at Baosteel (which is still in trial production and trial stage in China) uses SF6 gas as the insulation medium. Compared with air, SF6 has higher dielectric strength (about twice the air insulation strength at one atmosphere), high interrupting capacity (about 100 times the air rise and fall current), good cooling performance and load The current is about 1.25 times the air-cooled. SF6 almost only with the electrode in the event of electrical breakdown