Product Overview
The Corona Ring & Grading Ring (JYH, JPH, and JH Series Corona Shielding Fittings) is a vital protective hardware used in high-voltage (HV), extra-high-voltage (EHV), and ultra-high-voltage (UHV) overhead transmission lines and substations. Manufactured by YiHao Power, these rings redistribute electric field intensity around insulator strings and line hardware, preventing corona loss, radio interference, and premature insulation breakdown.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Series | JYH / JPH / JH Series Corona & Grading Rings |
| Ring Material | Seamless Pure Aluminum Alloy Tube / Cast Aluminum Brackets |
| Shape Configurations | Circular / Oval (Racetrack) / Custom Geometries |
| Surface Protection | Mirror Polish / Anodized / Electro-Passivated |
| Standard Compliance | ISO / ASTM / IEC / BS Standards Compliant |
| Application Scope | HV/EHV Transmission Insulator Strings, Transformers & Substation Busbars |
Product Types & Key Features
- Circular Corona Ring (JYH Series): Designed with a central mounting bracket for single insulator strings, effectively shielding the line-end insulator units.
- Oval Racetrack Corona Ring (JPH Series): Engineered for double or multi-bundle conductor assemblies, providing extended horizontal electric field coverage.
- Seamless Corrosion Resistance: Bended from seamless aluminum alloy tubes with zero burrs to guarantee long-term performance under harsh atmospheric conditions.
Quality Assurance
Every batch of corona rings manufactured by YiHao Power undergoes strict quality control, including surface smoothness inspection, weld non-destructive testing (NDT), and high-voltage corona inception tests.
