Gapless zinc oxide surge arresters whose rated voltage 10 - 500 kV are protective equipment used for protecting AC transmission and transformation equipment against damage from atmospheric over-voltage and switching over-voltage.
According to material of external housing, surge arresters can be divided into porcelain housing type (35kV-500kV) and polymeric housing type (10-220kV) .
Surge arresters can be used in following service conditions:
-Ambient temperature -50℃ to +50℃;
-Altitude above sea level up to 3000 m;
- 9 earthquake intensity
The surge arresters have passed all type test specified in IEC60099-4 at KEMA high power Lab.
The surge arresters can be manufactured and tested according to latest version IEC 60099-4 part 4 "Gapless metal oxide surge arrester for A.C. system".