Understanding Arrester Types — 10kV to 66kV Solutions Optimized English Article

Complete Guide to Arrester Types: 10kV Station, Distribution, Drop-Out, and Intermittent Arresters

Surge arresters are essential protective devices that shield electrical equipment from high transient overvoltages, limit follow current duration, and restrict follow current amplitude. CNYIHU offers a comprehensive range of arresters suitable for various voltage levels and application scenarios, from 10kV distribution networks to 66kV station protection.

10kV Station-Type and Distribution-Type Arresters

10kV station-type and distribution-type arresters are typically used in indoor applications. They are commonly installed in substations, switchgear cabinets, and distribution rooms to protect transformers, switchgear, and other critical equipment from lightning and switching overvoltages.

10kV Thermal-Explosion Type Arrester

The 10kV thermal-explosion type arrester represents an advancement over conventional 10kV arresters. It features a thermal-explosion disconnector installed at the outgoing terminal. When power-frequency short-circuit current flows through the arrester due to internal failure, the disconnector activates, safely disconnecting the faulted arrester from the system to prevent further damage.

10kV Drop-Out Type Arrester

The 10kV drop-out type arrester incorporates a drop-out disconnector that automatically disengages when a fault occurs. This design provides a significant operational advantage: maintenance personnel can quickly identify the fault location by visually observing which arrester has dropped out, reducing troubleshooting time and improving maintenance efficiency.

10kV Intermittent Type Arrester

The 10kV intermittent type arrester features an air gap that disconnects the arrester from the line when not in operation, maintaining an insulated state. It is primarily used for lightning protection on 10kV overhead lines with bare conductors or insulated conductors.

24kV / 35kV / 66kV Station-Type Arresters

24kV, 35kV, and 66kV arresters are common station-type lightning protection devices used for transformers, distribution busbars, and equipment such as transformers, instrument transformers, and circuit breakers. For outdoor applications, they protect overhead line terminations, cable terminations, and box-type substations in renewable energy installations including wind and photovoltaic power stations.

CNYIHU manufactures a complete range of composite zinc oxide arresters (export-type), including YH10W and YH5W series. All arresters are designed and tested in accordance with IEC and GB standards, ensuring reliable overvoltage protection across diverse operating environments.