一、概述( General description)
SPG-12型户外交流高压SF6断路器是引进韩国技术，结合国际、国内电网特点而设计，为额定电压12/24KV三相交流50Hz的户外配电网理想选型设备。
SPG-12 AC HV SF6 ort-door load switch based on the technology of korea, combining with the festures of our country powor supply. it is a new produce for distributing electricity in condition of outdo or AC3-Phase, rated voltage 12/24KV, frequency 50Hz.
主要技术参数(main technical data)
1、额定电压------------24KV
2、额定频率------------60Hz
3、额定电流------------1250A
4、额定短时耐受电流/4s--------20KA
5、额定峰值耐受电流------------50KA
6、额定短路关合电流（峰值）----------50KA
7、额定有功负载开断电流----------------1250A
8、额定闭环开断电流----------------------1250A
9、额定电缆充电开断电流----------------10A
10、额定电流开断次数---------------------≥400次
11、额定短时工频耐受电压---------------50KV
12、额定雷电冲击耐受电压---------------125KV
13、额定充气压力（表压）（20℃）----------0.07MPa
14、气体相对泄漏率------------------------≤1%/year
15、机构寿命---------------------------------5000times
三、主要特点（main feaures）
1、该负荷开关是以SF6气体作为绝缘和灭弧介质，将触头系统、操作系统和电流互感器全部密封在一个不锈钢箱体内，具有较高技术含量的新型高压开关设备。
2、采用压气式灭弧原理，触头系统采用铜钨合金，具有较高的电寿命。
3、操动机构采用双凸轮弹簧机构，其结构简单，性能可靠，具有较高的分合速出线套与开关本体之间、操作机构手柄与机构本体之间，采用EPR系列特殊的橡胶密封材料制作，并通过了-80℃的测试。
4、可选配电压传感器，以采集配电网运行参数。
5、本体采用3mm以上不锈钢板，采用熔接氩弧焊接，并进行了防锈处理。
6、吸湿剂可把本体内部的温度保持在300PPm以下，提高了整体的防泄漏防凝露性，可免维护30年。
this switch leads the new technology, which adopt the gas of SF6 as the insulator and the are estinguishing medium. the contact, oferation system, three current transformer and six potential transformer are all sealed in a stainless stee case.
adopt the principle of compressing air for are extinguishing. the contact system adopt coppertungsten alloy, it has long life lrelectricity.
the coperation mechanism is spring mechanism with double cam, simple coustrue, high reliability, and lead a high speed when open or close.
whatever between ortgong and the switch or between operating mechanism handle and mechanism, all adopt sealant to seal it, which produced by a special rubber called ERP series and passed the test under the temperature of -80℃.
using inside current and potential transformer to collect the data from the network.
the body of this load switch all manufaotured by the stinless steel that the thickness exceed 3mm, skllful welding, and by rust prevention treatment.
by the effect of the desiccant inside, it could keep the internal humidity under 300PPm. it improved the ability of anti-leakageand condensation. free of maintenance for 30 years.
