The 72.5kv-550kvgis lightning arrester adopts SF6 gas insulation, and the metal oxide resistor is used as the main element inside. The metal oxide resistor has excellent nonlinear volt ampere characteristics and steep wave response characteristics. It is mainly used to protect electrical equipment in power system from overvoltage damage.
Operating environment: minimum temperature: - 35 ℃; Maximum temperature: + 45 ℃; The daily average temperature shall not exceed: + 35 ℃; Monthly average maximum relative humidity: 95% (at 25 ℃); Maximum wind speed: 34 m / S; It can be designed according to the special use conditions of users.
Performance characteristics:
1. Miniaturization of products and small floor area;
2. The internal structure design is reasonable and the potential distribution is uniform;
3. It has high internal insulation level and high operation reliability. Under zero gauge pressure of SF6 gas, it can operate safely for a long time;
4. The product has reliable sealing and low air leakage rate. The annual air leakage rate is less than 0.3%, which is far better than the national standard requirement of 1%.

72.5kV-550kVGIS避雷器，采用SF6气体绝缘，内部采用金属氧化物电阻片作为主要元件，金属氧化物电阻片具有优异的非线性伏安特性和陡波响应特性。主要用来保护电力系统中电气设备免受过电压损害。

使用环境条件：最低温度：－35℃；最高温度：＋45℃；日平均温度不超过：＋35℃;月平均最大相对湿度：95%（在25℃）；最大风速：34 m/s；可根据用户特殊使用条件进行针对性设计。

性能特点：
1、产品小型化，占地面积小；
2、内部结构设计合理，电位分布均匀；
3、具有较高的内绝缘水平，运行可靠性高，SF6气体零表压下，可长时间安全运行；
4、产品密封可靠，漏气率低，年漏气率小于0.3%，远优于国标1%要求。