YH5WX-17/50 Polymer Housed Line Type Zinc Oxide Surge Arrester

Product Overview

The YH5WX-17/50 polymer housed line type zinc oxide surge arrester is designed for 10kV transmission lines to protect power systems from lightning and switching overvoltages. It effectively limits transient overvoltage, enhances the lightning protection level of the line, and minimizes fault tripping caused by lightning or switching surges.

The arrester adopts a gapless MOV (metal oxide varistor) design with a silicone rubber housing, ensuring fast response, excellent sealing, and superior outdoor durability. Manufactured in compliance with GB 11032-2000 (eqv IEC 60099-4) and JB/T 8952-2005, it meets or exceeds international performance standards, providing reliable overvoltage protection for modern power grids.

Model Designation Explanation

Symbol	Meaning
Y	Zinc oxide (metal oxide) surge arrester
H	Polymer-housed (silicone rubber) insulation
5	Nominal discharge current: 5kA
W	Gapless design for fast surge response
X	Line type arrester, for transmission line protection
17	Rated voltage (RMS): 17kV
50	Residual voltage at 5kA discharge: ≤50kV

Technical Specifications

Parameter	Value
Rated voltage (RMS)	17kV
Continuous operating voltage (RMS)	13.6kV
Nominal discharge current	5kA
Residual voltage at 5kA (peak)	≤50kV
DC reference voltage (U₁mA)	≥25kV
Leakage current at 0.75×U₁mA	≤50μA
Creepage distance	≥25mm/kV
Housing material	Silicone rubber (polymer)

Key Features and Advantages

1. Excellent Overvoltage Protection

Equipped with high-performance zinc oxide varistors, the YH5WX-17/50 arrester exhibits outstanding nonlinear voltage-current characteristics. It reacts instantly to surge currents, efficiently absorbing transient energy and keeping the voltage within safe limits, protecting insulators, towers, and downstream equipment.

2. Advanced Structural Design

The arrester is molded in one piece using advanced compression molding technology, ensuring exceptional sealing performance, moisture resistance, and anti-corrosion properties. The silicone rubber housing provides hydrophobicity, anti-pollution ability, UV resistance, and long-term aging resistance, making it ideal for harsh outdoor conditions.

3. Lightweight and Easy Installation

Its compact design and lightweight structure allow for easy installation on towers or poles. It supports both suspended and post-mounted configurations, adapting to diverse line layouts. The arrester’s high mechanical strength withstands vibration, wind, and ice loads commonly found in outdoor transmission environments.

4. Low Maintenance and Long Service Life

Thanks to its polymer housing, the YH5WX-17/50 requires minimal maintenance even in polluted or coastal environments. Its excellent contamination resistance helps prevent flashover, reducing maintenance costs and ensuring long-term stable operation throughout its lifecycle.

Typical Applications

• 10kV overhead transmission lines, especially in areas with high lightning activity or frequent trip faults.
• Lines with high tower grounding resistance, long-span crossings over rivers or mountains.
• Coastal and industrial regions where pollution and salt fog are prevalent.
• Rural and urban distribution networks, as well as renovation projects of aging lines requiring improved surge protection.

Installation & Maintenance Notes

• Install strictly according to national and industry electrical standards to ensure reliable electrical connection and mechanical fastening.
• Periodically inspect the arrester surface. Replace it if you notice cracks, mechanical damage, or corroded fittings.
• Store the product in dry, ventilated areas, away from direct sunlight or high humidity to prevent performance degradation.
• For maximum reliability, the arrester can be equipped with a thermal explosion disconnector (TLB-1 type) according to IEC 60099-4, which ensures quick disconnection of a failed arrester and prevents system faults.

Optional Accessory — Thermal Explosion Disconnector (TLB-1 Type)

When the surge arrester fails, the TLB-1 disconnector quickly isolates it from the system to prevent further faults and provide visible failure indication.
Performance Reference (per IEC 60099-4):

Current Level	Power Frequency (A)	Operation Time (s)	Square Wave Impulse (2000µs)
20	<0.5	∞	∞
200	<0.04	∞	∞
800	<0.02	∞	∞
600	∞	∞	∞
100	∞	∞	∞

The TLB-1 disconnector combines fast thermal response, broad current range adaptability (50mA–>50A), and reliable mechanical strength, ensuring safety and visibility during arrester fault conditions.

Compliance and Standards

GB 11032-2000 (eqv IEC 60099-4) — Metal Oxide Surge Arresters Without Gaps for AC Systems
JB/T 8952-2005 — Line Type Polymer Housed Arresters
IEC 60099-4 — Surge Arresters Standard
Certified for use in both effective and non-effective neutral grounding systems

Customer Feedback (Verified International Clients)

• “We installed YH5WX-17/50 on our 10kV rural distribution line in Queensland, and the lightning fault rate dropped by over 70%.” — EnergyLink Pty Ltd, Australia
• “Excellent hydrophobic performance and stable operation even in coastal conditions.” — Nordic Grid Service AB, Sweden
• “Easy to mount and maintain. The lightweight design made replacement much faster.” — Delta Power Systems, Canada
• “We’ve tested it under polluted environments, and leakage current performance remained consistent.” — ProElec Maintenance Ltd, UK
• “A robust, IEC-compliant arrester solution — perfectly matched with our existing tower design.” — Tennessee Power Utility, USA