| 1. | Apply the vacuum arcing chamber , air insulation and includes electric spring operation mechanism so that the product arcing ability is strong , short open circuit times is many , no fire and explosion danger , convenient operation , it is the product of good performance , and strong usefulness 采用真空灭弧室,空气绝缘配以电动弹簧操动机构,使得产品灭弧能力强,短路开断次数高,无火灾爆炸危险,操作方便,是一种性能优良,实用性较强的产品。 |