Metal Oxide Surge Arrester

This series of gapless zinc oxide surge arresters adopts high-performance zinc oxide varistors as the core, designed to suppress lightning and switching overvoltages, protect distribution and substation equipment from surge damage, and adapt to harsh outdoor conditions.

Core Features

Excellent non-linear zinc oxide varistors, fast response, low residual voltage, high current capacity and stable protection performance

One-piece molded silicone rubber housing, strong hydrophobicity, pollution & aging resistance, sealed & explosion-proof, with long maintenance-free cycle

Equipped with disconnector, automatically out of service in case of failure with clear indication, preventing accident escalation

Main Models

HY5WS-17/50DL Drop-Out Surge Arrester

For 10kV distribution systems. With dropout structure, it can be installed and replaced live with an insulating rod. Built-in thermal-explosion disconnector makes the arrester drop automatically to form a visible break point in case of failure, enabling maintenance without power outage. Ideal for pole-mounted transformers and distribution branch lines.

HY5WZ-51/134 Station-Class Surge Arrester with Disconnector

For 35kV substation systems, with station-class protection level, higher current capacity and sufficient protection margin. The disconnector automatically isolates the failed arrester to prevent single-phase ground fault expansion. Suitable for substations and main transformer inlet side protection.

For more voltage ratings, specifications and mounting options, please contact us for customization.