550kV High Voltage Post Insulator (C6-550 Series)
Engineered for extreme high-voltage substations and switchyards. Built with our proprietary C-130 porcelain compound developed from the Tyco/Morgan legacy, featuring optimized shed geometry for superior pollution performance in Class IV environments.
Designed for Extreme High-Voltage Performance
The C6-550 Series represents the pinnacle of Vuulcan's EHV post insulator technology. Developed specifically for 550kV transmission substations, this insulator delivers uncompromising reliability where failure is not an option. Each unit features 48 alternating profile sheds optimized through computational fluid dynamics to maximize self-cleaning performance.
The Zibo Manufacturing Base Advantage
Our 50,000m² facility in Zibo, Shandong Province, combines German precision engineering with three decades of Tyco/Morgan insulator expertise. Every C6-550 insulator benefits from:
- C-130 Porcelain Compound: Proprietary alumina-rich formulation delivering 40% higher dielectric strength than standard porcelain.
- Vacuum Extrusion Process: Eliminates internal voids for consistent electrical performance across the entire creepage path.
- 100% Ultrasonic Testing: Every unit scanned before glazing to detect micro-cracks invisible to the naked eye.
- Hydrophobic Glaze Coating: Factory-applied RTV-equivalent coating for enhanced pollution resistance.
Seismic & Environmental Qualification
The C6-550 has been validated for seismic zones up to 0.5g acceleration per IEEE 693 standard. Operating temperature range spans from -60°C to +55°C, with thermal shock resistance exceeding 200°C differential—ensuring reliable performance from Arctic installations to desert environments.
| Model Designation | C6-550 / C6-1550 (IEC Standard) |
|---|---|
| Rated Voltage | 550 kV |
| Lightning Impulse Withstand (BIL) | 1,550 kV |
| Switching Impulse Withstand (SIL) | 1,175 kV |
| Power Frequency Withstand (Dry) | 680 kV |
| Power Frequency Withstand (Wet) | 580 kV |
| Creepage Distance | 16,500 mm (31mm/kV, Pollution Class IV) |
| Cantilever Failing Load | 12.5 kN (Standard) / Custom up to 20kN |
| Torsional Strength | 4.0 kNm |
| Total Height | 4,850 mm |
| Maximum Shed Diameter | 420 mm |
| Number of Sheds | 48 (Alternating Profile) |
| Mounting | Bottom Flange (Custom PCD Available) |
| Net Weight | Approx. 385 kg |
| Porcelain Body | C-130 Aluminous Porcelain (≥48% Al₂O₃) |
| Glaze | Brown/Grey with Hydrophobic Coating |
| Hardware | Hot-dip Galvanized Steel (≥86μm) |
Primary Applications
The C6-550 Series is specifically designed for the most demanding EHV power infrastructure:
- 550kV EHV Substations: Primary busbar support and disconnect switch installations.
- UHVDC Converter Stations: AC-side equipment support in ±800kV and ±1100kV projects.
- Power Generation Plants: Step-up transformer yards and switchyards.
- Grid Interconnection Points: Cross-border transmission tie stations.
- High-Voltage Testing Laboratories: Impulse generator and test bay support structures.
Environmental Suitability
With 31mm/kV specific creepage distance, the C6-550 is rated for IEC Pollution Level IV (Very Heavy) environments, including:
- Coastal installations within 1km of shoreline
- Heavy industrial areas with conductive dust
- Desert regions with high salinity sand
- Areas subject to agricultural burning
Project References
C6-550 Series insulators are deployed in major infrastructure projects across Asia, Middle East, and Africa, including 500kV substations in Pakistan, 550kV switching stations in Saudi Arabia, and EHV grid expansion projects in Southeast Asia.
C6-550 Technical Drawing Package
Includes: Dimensional drawing, Bottom flange PCD details, Shed profile geometry
Download 2D Drawing (PDF)Custom Configurations Available: Contact our engineering team for modified PCD patterns, alternative cantilever ratings, or project-specific creepage requirements. Request Engineering Support →