金屬氧化物避雷器是目前國際上限制過電壓最可靠和最先進的一種保護電器，從低壓220伏到百萬千伏等級的超高壓系統(tǒng)，從配電、電站、電容器、電動機、電氣化鐵道以及變壓器和發(fā)電機中性點等不同場所的電氣設(shè)備，都在廣泛的使用，它具有動作快、伏安特性平坦、殘壓低、通流容量大、性能穩(wěn)定、壽命長、結(jié)構(gòu)簡單等優(yōu)點。Metal oxide surge arresters are the most reliable and advanced electric equipment protectors adopted by the international community to limit over voltages, which are widely adopted in 220 -volt low voltage systems, one million kilovolts extra high voltage systems and in electrical equipment including power distribution, power stations, capacitors, electric motors, electrified railways, transformers and generator neutrals on different sites. The arresters have advantages of quick movement, stable voltage characteristics, low residual voltage, great flow capacity, stable performance, higher life expectancy and simple structure.復(fù)合外套金屬氧化物避雷器是有機絕緣材料和傳統(tǒng)的瓷套式金屬氧化物避雷器技術(shù)優(yōu)點的綜合科研成果。它不僅具有瓷套式金屬氧化物避雷器的優(yōu)點，還具有電氣絕緣性能好、節(jié)電強度高、抗漏痕、抗電蝕、耐熱、耐寒、耐老化、防爆和良好的化學(xué)穩(wěn)定性、憎水性、密封性等。Metal oxide surge arresters with compound coat are comprehensive achievements in scientific research which integrated advantages of organic insulating material and traditional metal oxide surge arresters with porcelain sets, so that they not only have advantages of metal oxide surge arresters with porcelain sets but also have merits of good electrical insulation properties, high electricity saving properties, drain marks resistance, electric erosion resistance, heat proof, cold resistance, age resistance, explosion proof, good chemical stability,hydrophobic nature and impermeability.