The Zinc Oxide lighting arrester are used for protection of electrical equipment from all kind of over-voltages caused by lightening or switching operations. Surge arresters are made of metal-oxide (MO) resistors without spark gaps directly molded in silicone housing, in gray color or red color, and designed and tested according to IEC 60099-4 and IEC 62848-1.
Compared with the conventional silicon carbide arrester, this presciption of the product improves greatly the volt-Ampere characteristics of the resistor disc and increased through-current capability at over-voltage so as to during a radical changes for the characteristics of the arresters. Under the circumstance of normal operating voltage, the current through the arrester is just on microampere degree, When suffered from over-voltage, the arrester’s excellent nonlinear characteristics will make the current through the arrester increase to several thousand ampere, while the arrester will be under the circulating state and release over-voltage energy so as to protecting the power transmission equipment against the damage caused by the over-voltage.
1.Small size, Light weight, resistance to impact, no collision damage during transportation, flexible installation, suitable for use in the switch cabin.
2.Special structure, the overall compression molding, no air gap, good sealing performance, moisture-proof and explosion-proof
3.Large creepage distance, good hydrophobicity ,strong stain resistance, stable performance and reduce operation maintenance.
4.Unique formula of zinc oxide resistors, small leakage current, slow aging, long service life.
5.With DC reference voltage, rectangular flow capacity and high current and large current withstand capacity are higher than standard requirement.