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I. Overview
Metal oxide surge arresters are currently the most advanced protective devices for limiting overvoltages, widely used in power generation, transmission, transformation, and distribution systems to prevent insulation damage to electrical equipment from overvoltage.
Organic-coated metal oxide surge arresters are a scientific achievement combining organic insulating materials with the technical advantages of traditional porcelain-housed metal oxide surge arresters. They not only retain the benefits of porcelain-housed surge arresters but also feature excellent electrical insulation properties, high dielectric strength, resistance to tracking and erosion, thermal and cold resistance, anti-aging, explosion-proofing, hydrophobicity, and superior sealing.
II. Product Model Description
According to JB/T 8459-1996 "Method for Compiling Surge Arrester Product Models," the product model description for metal oxide surge arresters is as follows:

Product Type: Y—Indicates porcelain-housed metal oxide arrester
YH (HY)—Indicates composite-housed metal oxide arrester
Structural Feature: W—Indicates gapless, C—Indicates series gap, B—Indicates parallel gap
Application Site: S—Indicates distribution type, Z—Indicates station type, R—Indicates for shunt compensation capacitors
D—Indicates for motors, T—Indicates for electrified railways, X—Indicates for line use
Additional features: W—indicates anti-fouling type G—indicates plateau type TH—indicates for use in humid tropical regions
III. Selection
Users can choose different types of arresters based on the objects to be protected.
To meet market demands, our company can design various non-standard products according to customer requirements.
IV. Inspection and Maintenance
First, check whether the appearance is intact.
Before the product is put into operation, measure the DC reference voltage U1mA value, which must not be less than the value specified in GB11032-2000; measure the leakage current at 0.75 U1mA, which should not exceed 50μA. After operation, measure it every four years to check compliance. No power frequency discharge voltage test is allowed for gapless arresters.
V. Technical Standards %% The product performance complies with the technical requirements of GB11032-2000, IEC60099-4, and IEEE C62.11 standards. %% VI. Common Models %% Electrified railway type protects various electrical equipment, overhead contact networks, and electric locomotives in electrified railways from damage caused by atmospheric overvoltage and switching overvoltage.
The product performance complies with the technical requirements of GB11032-2000, IEC60099-4, and IEEE.C62.11 standards.
6. Common Models
Electrified Railway Type protects various electrical equipment, contact networks, and electric locomotives in electrified railways from damage caused by atmospheric overvoltage and switching overvoltage.