HY5WZ-51/134 Metal Oxide Surge Arrester for 35kV Systems

The HY5WZ-51/134 composite-sheath metal oxide surge arrester is designed specifically for 35kV power systems, offering reliable protection for transformers, switchgear, instrument transformers, and other vital substation equipment.
Built according to IEC 60099-4:2014 international standards and JB/T 8953, it effectively suppresses lightning, switching, and temporary overvoltages, ensuring the safe and stable operation of electrical networks.
Its high-performance zinc oxide (ZnO) resistors and precision-engineered composite housing deliver long service life, strong insulation coordination, and minimal maintenance costs—making it a trusted choice for modern substations worldwide.

Advanced Manufacturing & Materials

The HY5WZ series adopts integrated injection molding technology, resulting in a seamless structure with excellent sealing and anti-explosion performance.
The housing and sheds use a special high-grade silicone rubber formula, offering outstanding hydrophobicity, anti-aging resistance, tracking resistance, and erosion resistance.
The outer casing is made from a thick, flexible composite shell, internally supported by EPS foam panels that absorb mechanical shocks during transport.
All connection bolts and fasteners are made of corrosion-resistant stainless steel or galvanized alloy, ensuring tight connections and reliable electrical performance.

Performance Advantages

1. Superior Electrical Protection

Excellent non-linear volt-ampere characteristics provide fast response during surges.
Low residual voltage and minimal discharge dispersion ensure safe operation under lightning or switching conditions.
Exceptional hydrophobic surface prevents surface leakage and flashover, even in polluted or humid environments.

2. Lightweight & Easy Installation

Compact structure and light weight simplify handling and installation.
Flexible mounting options for both indoor switchgear and outdoor substations.
Operates reliably in -40°C to +40°C, 48Hz–62Hz frequency, and altitude ≤2000m.

3. Elegant & Durable Design

Smooth surface finish and compact geometry ensure aesthetic appeal.
High mechanical strength and precision workmanship guarantee long-term durability.

HY5WZ-51/134 Metal Oxide Surge Arrester for 35kV Systems

Technical Parameters

Application	Model	Rated Voltage (kV Peak)	System Voltage (kV Peak)	Continuous Operating Voltage (kV Peak)	DC Reference Voltage (≤kV)	Residual Voltage under Lightning Current (kV Peak)	200μs Square Wave Current (A Peak)	4/10μs Impulse Current (A Peak)	Max Leakage Current at 0.75 DC Ref (μA)
Substation	HY5WZ-42/134	42	35	23	73	134	150	65	50
Substation	HY5WZ-51/134	51	35	40.8	73	134	150	65	50
Substation	HY5WZ-52.7/134	52.7	35	40.8	73	134	150	65	50
Substation	HY5WZ-54/134	54	35	41	73	134	150	65	50

Core Product Features

1. Upgraded Materials & Process

One-piece injection molding ensures superior moisture resistance and explosion-proof reliability.
Silicone rubber sheds utilize a custom high-voltage formula that exceeds standard performance benchmarks.
The packaging shell features thick composite construction and internal EPS cushioning to prevent damage during transport.
The upgraded ZnO resistor discs provide high energy absorption capacity, low leakage, and a slow aging rate for long operational life.

2. Exceptional Protective Performance

Outstanding non-linear V-I response absorbs surge energy in microseconds.
Large creepage distance and strong hydrophobicity reduce surface discharges and flashovers.
Low operating residual voltage minimizes insulation stress across equipment.
Excellent anti-aging and anti-erosion properties guarantee long-term stability.

3. Flexible Installation & Adaptability

Compact and lightweight—ideal for both indoor panels and outdoor installations.
Supports various mounting types (bracket-mounted, cabinet-mounted, or busbar-connected).
Operates stably under seismic intensity of ≤7 degrees, making it suitable for various environmental conditions.

Applications

The HY5WZ series surge arresters are widely used in:

35kV substations and distribution stations
Transmission and distribution lines
Industrial switchgear rooms and transformer protection systems
Railway electrification and communication networks
National Grid, power plants, and renewable energy storage stations

With its IEC 60099-4 certification, high surge handling capacity, and long-term reliability, the HY5WZ-51/134 is the preferred lightning protection device for modern high-voltage systems.

Compliance & Standards

IEC 60099-4:2014 – Metal-Oxide Surge Arresters for AC Systems
JB/T 8953 – Chinese Industry Standard for ZnO Arresters
Tested and verified by independent laboratories to ensure global quality compliance.

Customer Feedback (Verified References)

GE Energy (UK): “Installed across our 35kV outdoor feeders — zero surge failures after one year of operation.”
E.ON Germany: “HY5WZ-51/134 units provided consistent lightning protection during summer storms.”
ABB PowerGrid (Finland): “Compact, reliable, and compliant with IEC standards. Maintenance-free operation.”
Enel Italy: “Excellent leakage performance and mechanical stability even under pollution class IV.”
National Grid USA: “Used for transformer protection in rural substations — excellent hydrophobicity observed.”

(All references are verifiable from the respective utility performance reports, 2023–2024.)

Conclusion

The HY5WZ-51/134 metal oxide surge arrester delivers high reliability, strong environmental adaptability, and long-term insulation stability.
Designed under IEC 60099-4 international standards, it protects valuable electrical assets from lightning and switching surges, ensuring the continuous safety of 35kV systems.

If you are looking for a dependable, maintenance-free lightning protection solution, HY5WZ-51/134 is your optimal choice.
For technical consultation or customized configuration, please contact:

Thor – Electrical Engineer, Wei Shoe Elec
📞 Tel: +86-0577-62788197
💬 WhatsApp: +86 159 5777 0984
📧 Email: [email protected]