The P-Series Post Porcelain Insulators (P-70, P50, P-13) are premium-grade electrical insulation components specifically engineered for 22kV and 33kV disconnector switches. Manufactured with high-strength porcelain and advanced glazing technology, these insulators deliver exceptional dielectric strength and mechanical stability in demanding power distribution environments.
Key Features & Benefits
High Voltage Rating: Certified for 22kV and 33kV applications, ensuring reliable performance in medium-voltage networks
Superior Porcelain Construction: High-alumina content porcelain provides excellent mechanical strength (70kN+), corrosion resistance, and long-term durability
Weather-Resistant Design: Advanced glazing surface prevents moisture absorption and contamination buildup, maintaining insulation integrity in harsh conditions
Thermal Stability: Withstands extreme temperature variations (-40°C to +70°C) without performance degradation
Easy Installation: Standardized mounting design compatible with major disconnector switch brands
Anti-Flashover Performance: Optimized creepage distance (320-380mm) minimizes flashover risk in polluted environments
Technical Specifications
Rated Voltage: 22kV / 33kV
Rated Mechanical Load: 70kN (P-70), 50kN (P50), 13kN (P-13)
Material: High-strength electrical porcelain
Creepage Distance: 320mm -500 mm
Standards Compliance: IEC 60273, IEC 60383, ANSI C29.9
Operating Temperature: -40°C to +70°C
- Cantilever strength:3.6kn
- Special requirement :acc to customers’ design
Applications
Disconnector switches in substations
Power transmission and distribution lines
Railway electrification systems
Industrial power distribution
Renewable energy integration (solar/wind farms)
Why Choose Our Porcelain Insulators?
With over [25] years of electrical insulation expertise, our P-Series insulators undergo rigorous quality testing to ensure:
Zero puncture failures
Consistent dielectric performance
Mechanical integrity under extreme loads
Long service life (>30 years)
Customization Available: Contact us for modified creepage distances, alternate mounting configurations, or special voltage requirements.
