Our company specializes in producing 0.28~220kV AC system metal oxide surge arresters and electric railway surge arresters with porcelain and polymeric housing for protection against over-voltage damage, meanwhile we are producing surge arresters used for special condition and area.Service condition:1) Ambient temperature: -50°C ~ +50°C2) Altitude: up to 1,500m3) Maximum wind velocity: 45m/s4) Earthquake intensity: 7 degrees, 0.3g5) Note: any severer condition, please specifyStandard applied: IEC60099-4Type test report: issued by KEMA or CNAL memberPolymer coat with casting