surge arreser metal oxide gapless type lightning arrester, polymer arrester insulator 1.brand: DCI 2. ISO9001,ISO14001 Surge arrester metal oxide gapless type lightning arrester, polymer arrester insulator1.brand: DCI2.color: gray ... the protection of various electrical appliances in power system,rSurge Arrester insulator is a kind of overvoltage protector mainly applied for ...