3kV Generator Type Zinc Oxide Arrester HY5WD-3.8/9.5 Composite Housing Overvoltage Protection

Product Overview

Metal oxide arresters (zinc oxide arresters) produced and sold are currently the best type of overvoltage protection devices, widely used in power generation, transmission, transformation and distribution systems to protect the insulation of electrical equipment from overvoltage damage. Their core components adopt excellent "nonlinear volt-ampere" characteristics, greatly improving overvoltage current carrying capacity, thus bringing fundamental changes to arrester characteristics. Under normal operating voltage, the current through the arrester is only microampere level. When subjected to overvoltage, due to the nonlinearity of zinc oxide resistance, the current through the arrester instantly reaches thousands of amperes, and the arrester is in a conducting state, releasing overvoltage energy, thereby effectively limiting overvoltage damage to transmission and transformation equipment.

Organic housing metal oxide arresters are a scientific research achievement combining organic insulation materials with traditional porcelain housing metal oxide arrester technology advantages. They not only have the advantages of porcelain housing metal oxide arresters, but also have good electrical insulation performance, high dielectric strength, anti-tracking, anti-corrosion, heat resistance, cold resistance, aging resistance, explosion-proof, hydrophobicity, and good sealing performance.

HY5WD-3kV arrester is suitable for AC 220kV and below power generation, transmission, transformation and distribution systems, used to limit the amplitude of lightning and system internal operating overvoltages to specified levels, and is the basic equipment for system insulation coordination. It is the ideal lightning protection component for integrated, modular medium and high voltage transmission and transformation complete equipment. Generator type arrester models include HY5WD-3.8/9.5, HY5WD-4/9.5, HY5CD-3.8/8.6.

HY5WD series generator type zinc oxide arresters adopt composite housing design, with excellent explosion-proof performance and weather resistance, suitable for various harsh environments. Their unique nonlinear resistor discs can respond quickly to overvoltages, effectively protecting generator stator winding insulation. The product has compact structure, convenient installation and low maintenance cost, making it an ideal choice for generator overvoltage protection.

Applicable Standards

This product model is compiled according to JB/T8459-1996 "Arrester Product Model Designation Method". Gapless products comply with GB11032-2000 "AC Gapless Metal Oxide Arresters"; gapped products comply with JB/T9672-2005 "Metal Oxide Arresters with Series Gaps". Important parameters and configuration methods not clearly defined in the above standards shall be modified and implemented according to DL/T620-1997 "Overvoltage Protection and Insulation Coordination of AC Electrical Installations".

Main Technical Parameters

Arrester Model	System Rated Voltage kV	Arrester Rated Voltage kV	Continuous Operating Voltage kV	DC 1mA Voltage kV	Lightning Impulse Residual Voltage kV	Switching Impulse Residual Voltage kV	Square Wave Current Capacity A	High Current Impulse Withstand kA	0.75U1mA Leakage Current μA	Material	Application
HY5WD-3.8/9.5	3.15	3.8	2.0	7.2	13.5	11.5	200	65	50	Composite Housing	Generator Type
HY5WD-4/9.5	3.15	4	3.15	7.2	13.5	11.5	200	65	50	Composite Housing	Generator Type
HY5CD-3.8/8.6	3.15	3.8	-	-	12.0	10.2	200	62	-	Composite Housing	Generator Type

Outline Dimensions