冶金企业现6~35 kV供配电系统中性点普遍采用不接地方式,随着电网不断扩大和电缆出线的增多,系统对地电容电流急剧增加,如果系统发生过电压,很容易引发相间短路的造成重大事故.为此,企业6~35 kV供配电系统大多采用消弧柜消弧方式,对电网中出现的过电压进行限制,以提高电网运行的安全性和供电的可靠性.%The 6~35 kV power supply and distribution system of metallurgical enterpris-es generally adopts ungrounded mood at the neutral point. With the expansion of power grid and increase of cable outlets, the earth capacity and earth current of the system have in-creased dramatically, so if overvoltage happens in the system it is easy to cause major acci-dent of short circuit between phases. Therefore, the 6~35 kV power systems mostly adopt arc suppression ark to limit overvoltage in power grid and improve the safety of power grid opera-tion and reliability of power supply.
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