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High Voltage Porcelain Insulator for 20 kV and 35 kV Utility Wire Applications
Product Spotlights
Manufactured from high-grade electrical porcelain for superior dielectric strength and long-term reliability in 20kV/35kV utility networks. Features customizable creepage distance for varied pollution levels, high mechanical load capacity, and corrosion-resistant galvanized fittings. ISO9001-certified production ensures consistent quality for global utility applications, supporting grid stability with minimal lifetime maintenance.
US$ 4 - 99
MOQ: 100 Units
Key Specifications
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Application:
Other, Utility power transmission and distribution lines
Type:
Other, Pin-type, suspension, or post-type (customizable)
Material:
High-grade electrical porcelain
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Application
Other, Utility power transmission and distribution lines
Type
Other, Pin-type, suspension, or post-type (customizable)
Material
High-grade electrical porcelain
Rated Voltage
20 kV, 35 kV
Creepage Distance
Customizable based on pollution level
Mechanical Strength
High mechanical load capacity
Standards Compliance
IEC, ANSI standards (specifics available upon request)
Installation Type
Overhead line applications
Color
Brown or glazed white (standard)
Mounting
Threaded or ball-and-socket type available
As a professional manufacturer with ISO9001 certification, Jinhua Dika Electrical Equipment Co., Ltd. specializes in producing reliable high voltage porcelain insulators for critical utility infrastructure. Our insulators for 20 kV and 35 kV applications are engineered to ensure uninterrupted power flow and long-term safety in diverse environmental conditions. With an annual export value reflecting our global reach across North America, South America, Europe, Asia, and Africa, we have built a reputation for delivering products that meet the rigorous demands of utility companies worldwide. This specific porcelain insulator is a cornerstone of our product line, designed to provide exceptional dielectric strength and mechanical durability for overhead distribution networks.
Core Product Features & Technical Advantages:
- Superior Dielectric Performance: Manufactured from high-alumina electrical porcelain, the insulator body provides excellent insulation resistance and high puncture strength, effectively withstanding switching surges and lightning impulses common in 20 kV and 35 kV systems.
- Exceptional Mechanical Durability: Designed with a high mechanical failing load, these insulators resist bending, torsion, and compression forces from conductor weight, wind, and ice loading, ensuring structural integrity over decades.
- Optimized Design for Utility Needs: The profile and creepage distance are carefully calculated based on standard pollution severity levels (e.g., Light, Medium, Heavy). This design prevents flashover and leakage current, which is crucial for maintaining reliability in coastal, industrial, or desert environments.
- Corrosion-Resistant Metal Fittings: Galvanized cast iron or malleable iron fittings (hot-dip galvanized to relevant standards) are securely cemented to the porcelain, providing a reliable connection point that resists rust and degradation.
- Thermal and Weather Stability: The porcelain material exhibits minimal thermal expansion and is impervious to UV radiation, temperature cycling from -40°C to +70°C, and moisture ingress, preventing cracking or performance loss.
Detailed Specifications & Configurations:
Our high voltage porcelain insulators are available in various types to suit different line configurations and tower designs. Below is a summary of key specifications. Custom parameters are available upon request to match your specific project requirements.
| Parameter | Typical Value / Description |
| Rated System Voltage | 20 kV, 35 kV (Other voltages customizable) |
| Rated Lightning Impulse Withstand Voltage | 125 kV, 170 kV, or as per standard |
| Power Frequency Wet Withstand Voltage | 50 kV, 70 kV, or as per standard |
| Minimum Creepage Distance | From 320 mm to 450 mm+ (based on pollution level) |
| Mechanical Failing Load (MFL) | 40 kN, 70 kN, 120 kN (Standard range) |
| Insulator Type | Pin Type (for distribution poles), Suspension/Disc Type (for transmission), Post Type |
| Standards | Design conforms to IEC 60383, ANSI C29.2, or other regional standards |
Benefits for Your Utility Operations:
- Enhanced Grid Reliability: Reduces the frequency of line outages caused by insulator failure, leading to improved System Average Interruption Duration Index (SAIDI).
- Low Lifetime Cost: The longevity and minimal maintenance requirements of porcelain insulators result in a lower total cost of ownership compared to alternatives that may require more frequent replacement.
- Safety Assurance: High mechanical and electrical margins ensure safe operation for line personnel and the public, even under adverse conditions.
- Project Flexibility: Our capability to customize dimensions, creepage, and fittings allows for seamless integration into both new projects and legacy system upgrades.
- Global Supply Chain Support: With major ports like Shanghai, Tianjin, Guangzhou, and Ningbo as shipment points, we ensure timely and efficient delivery to your project sites worldwide.
Frequently Asked Questions (FAQ):
-
What are the main advantages of porcelain over polymer composite insulators for 20/35 kV lines?
Porcelain offers proven long-term stability (50+ year service life), excellent resistance to UV degradation and vandalism, and stable electrical properties unaffected by surface hydrophobicity loss. It is often preferred for its robustness in harsh, polluted environments. -
Can you provide insulators for specific pollution levels (e.g., heavy industrial or coastal areas)?
Yes. We design insulators with extended creepage distances and specific shed profiles to meet the requirements for Light, Medium, Heavy, and Very Heavy pollution severity levels as defined in IEC 60815. -
What quality control measures are in place during manufacturing?
Our ISO9001-certified process includes raw material testing, routine mechanical load tests (proof, routine, and sample tests), and electrical tests (puncture, flashover) on production batches to ensure every unit meets specifications. -
Are the metal fittings hot-dip galvanized, and to what standard?
Standard fittings are hot-dip galvanized to provide corrosion protection. The coating thickness typically complies with ISO 1461 or ASTM A153. Specific standards can be followed upon request. -
Do you offer complete insulator sets with all necessary hardware?
We can supply complete units, including the porcelain insulator with cemented fittings. Associated hardware like pins, caps, or suspension sets can be provided as part of a package. -
What is the typical lead time for a standard order?
Lead time depends on order quantity and specifications. For standard catalog items, production and shipment can often be completed within 4-6 weeks. We provide precise timelines upon order confirmation. -
How should these insulators be stored and handled before installation?
Insulators should be stored in a dry place, protected from impact. Avoid stacking them directly on hard surfaces. Use appropriate lifting techniques to prevent damage to the porcelain or fittings. -
Can you provide test reports or certificates for the products?
Yes. Routine test reports and certificates of compliance are available. Type test reports from independent laboratories for specific designs can be provided subject to request and model.
Trust & Commitment:
Backed by our ISO9001 quality management system and a dedicated team of 11-50 professionals, Jinhua Dika is committed to manufacturing insulators that utility engineers can depend on. Our products serve a global clientele across six continents, from North America and Western Europe to Southeast Asia and Africa, a testament to their adaptability and performance. We invite you to leverage our manufacturing expertise and reliable supply chain to secure the high-voltage porcelain insulators your utility projects require. Contact us today to discuss your specifications, request samples, or receive a detailed quotation.
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1Yr
Business Type
Manufacturer
Annual Export Value
US$1 Million - US$1.5 Million
Total Employees
11 - 50 People
Product Certifications
ISO9001
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