YH / YHW Type Zinc Oxide Lightning Arrester (10–220kV)

Surge Protection for Overhead Lines, Substations, and Power Equipment

The YH / YHW series metal oxide surge arresters are designed to protect electrical systems from lightning and switching surges in overhead lines, distribution substations, and medium-to-high voltage equipment. These non-gap metal oxide varistor (MOV) arresters provide fast response, high energy absorption, and stable performance even in polluted or coastal environments.

Available from 10kV up to 220kV, these arresters are manufactured in both porcelain-housed (YH) and polymer-housed (YHW) variants, covering a wide range of utility and industrial protection needs.

⚡ Product Highlights

Rated Voltage: 10kV–220kV
Housing Options: Porcelain (YH) or polymer (YHW)
Design: Gapless zinc oxide varistor (MOV) core
Standards: IEC 60099-4 / GB 11032-2010
Installation: Outdoor, vertically mounted
Performance: Excellent sealing, aging resistance, and overvoltage suppression

🌍 Applications

Overhead transmission and distribution lines
Medium voltage switchgear and ring main units (RMU)
Power transformers, capacitor banks, reactors
Renewable energy interconnection points (wind / solar farms)
Coastal, industrial, or high-altitude substations

The YHW polymer type is preferred in areas prone to salt fog, acid rain, or seismic activity, offering lighter weight, anti-fracture insulation, and better contamination performance.

🧱 Structural Features

High-energy ZnO varistor blocks with uniform voltage distribution
Stainless steel fittings for anti-corrosion durability
Multi-seal structure (O-ring + silicone sealant)
Pressure release mechanism for safe failure under fault conditions
An optional leakage current monitoring interface available

📊 Technical Specifications

Parameter	Value Range (Typical)
Rated Voltage	10kV to 220kV
Continuous Operating Voltage (Uc)	8.4kV to 190kV
Rated Discharge Current	5kA / 10kA / 20kA
Residual Voltage (8/20μs)	26kV–750kV
Leakage Current	≤ 50μA (typical)
Creepage Distance	≥25mm/kV (customizable)
Housing Material	Porcelain / Composite Polymer
Mechanical Load Strength	≥1000N

🔄 Model Designation

Model	Voltage Class	Housing Type	Typical Use
YH-10	10kV	Porcelain	Distribution transformers
YHW-35	35kV	Polymer	MV substation & switchgear
YH-110	110kV	Porcelain	Transmission-level transformer bays
YHW-220	220kV	Polymer	Outdoor HV substations (coastal)

❓ Frequently Asked Questions

• What’s the difference between YH and YHW types?
YH is porcelain-housed (classic design), while YHW is polymer-housed (lightweight, better pollution resistance).

• Can these arresters be installed horizontally?
No. They are designed for vertical outdoor installation to ensure proper drainage and pressure release.

• Is monitoring supported?
Yes. Optional leakage current detectors or counters are available for periodic diagnostics.

• Are they tested to IEC standards?
Yes. All units are type-tested and routine-tested per IEC 60099-4 and GB 11032-2010.

• Can I use YHW for inland dry substations?
Yes, polymer types perform well in both clean and polluted environments, and they reduce mechanical load on structures.