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Help CenterPorcelain Insulator Designed for 20 kV and 35 kV Substation Bus Connections
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As a specialized manufacturer with ISO9001 certification, Jinhua Dika Electrical Equipment Co., Ltd. is dedicated to producing reliable electrical components for global power infrastructure. Our Porcelain Insulators for 20 kV and 35 kV Substation Bus Connections represent a core product line, engineered to ensure safe and stable power transmission in demanding environments. We understand that the integrity of bus connections is critical to substation performance, and our insulators are designed to provide exceptional dielectric strength and long-term durability. With an annual export value reflecting our commitment to international markets, we supply these essential components to utilities and contractors across North America, South America, Europe, Asia, and beyond.
Core Product Features & Technical Advantages:
- Superior Dielectric Performance: Manufactured from high-grade electrical porcelain, these insulators offer excellent insulation properties, effectively withstanding the operational voltages of 20 kV and 35 kV systems. The material's inherent stability prevents current leakage, ensuring personnel safety and equipment protection.
- Optimized Mechanical Design: Engineered for both vertical and horizontal installation on busbars, the insulator's shape and internal structure provide high cantilever strength to resist wind loads, ice accumulation, and electromagnetic forces within the substation.
- Enhanced Environmental Resistance: The smooth, glazed surface of the porcelain sheds water efficiently and minimizes the accumulation of dust, salt, or other contaminants. This design is crucial for maintaining performance in areas with high pollution levels, preventing flashovers.
- Precision Manufacturing: Our ISO9001-certified production process ensures consistent dimensional accuracy, mechanical strength, and electrical characteristics. Each unit undergoes rigorous testing, including power frequency withstand voltage and mechanical load tests, before shipment.
Detailed Technical Specifications:
| Parameter | Specification for 20 kV | Specification for 35 kV | Notes |
|---|---|---|---|
| Rated Voltage | 20 kV | 35 kV | System voltage level |
| Power Frequency Withstand Voltage (Dry/Wet) | 50 kV / 40 kV | 80 kV / 70 kV | 1-minute test |
| Lightning Impulse Withstand Voltage | 125 kV | 185 kV | Peak value |
| Minimum Creepage Distance | 450 mm | 630 mm | Customizable for specific pollution class |
| Cantilever Failing Load | 8 kN | 12 kN | Minimum guaranteed value |
| Compressive Failing Load | 60 kN | 80 kN | Minimum guaranteed value |
| Material | High-Alumina Electrical Porcelain | Brown or Gray glaze finish | |
| Operating Temperature Range | -40°C to +70°C | Wide range suitability | |
Benefits for Your Project:
- Long Service Life & Reduced Maintenance: Porcelain's resistance to weathering, UV radiation, and thermal cycling translates into decades of reliable service with minimal maintenance needs, lowering your total cost of ownership.
- High Safety Factor: The design exceeds standard mechanical and electrical requirements, providing a significant safety margin for unexpected overloads or harsh environmental conditions.
- Global Compliance: Products are designed to meet international standards such as IEC and ANSI, facilitating their use in projects worldwide, from North America and Western Europe to Southeast Asia and Africa.
- Logistical Support: We offer flexible shipping from major Chinese ports including Shanghai, Tianjin, Guangzhou, and Ningbo, ensuring timely delivery to support your construction schedules.
Trust in a supplier with a proven track record. Jinhua Dika Electrical Equipment Co., Ltd. exports over US$1 million worth of electrical equipment annually, serving a diverse client base across six continents. Our focus on manufacturing quality porcelain insulators, backed by ISO9001 quality management, means you receive a product built for performance and longevity. For engineers and procurement managers seeking dependable components for 20 kV or 35 kV substation upgrades or new builds, our insulators offer a robust and cost-effective solution. Contact us today to discuss your specifications, request samples, or get a detailed quotation tailored to your project requirements.
Frequently Asked Questions (FAQ):
Q1: What are the main advantages of porcelain over composite polymer insulators for bus connections?
A: Porcelain insulators offer superior long-term stability against weathering and UV degradation, higher compressive strength, and a proven history of reliability over decades. They are often preferred for fixed, high-mechanical-stress applications like bus connections within substations.
Q2: Can you provide insulators for specific pollution levels (e.g., heavy industrial or coastal areas)?
A: Yes, absolutely. We can adjust the creepage distance (the path over the insulator surface) and the shed profile design to meet requirements for light, medium, heavy, or very heavy pollution levels as per IEC 60815 or other standards.
Q3: What mounting hardware or fittings are included?
A: Standard units are supplied with galvanized or stainless steel flanges and bolts suitable for connection to standard busbar sizes. Specific fitting types (e.g., specific bolt patterns, clamp styles) can be customized upon request.
Q4: How do you ensure the mechanical strength of your porcelain insulators?
A: We use high-alumina content porcelain for enhanced strength. Every production batch undergoes sample destructive testing for cantilever and compressive failing load to verify they meet or exceed the rated values.
Q5: What is the typical lead time for an order?
A: For standard specifications, lead time is approximately 4-6 weeks after order confirmation. Larger custom orders may require additional time for mold preparation and testing.
Q6: Do you offer any testing certificates with the shipment?
A: Yes, we provide a manufacturer's test report for each shipment, which includes key electrical and mechanical test results. Third-party inspection and certification can be arranged if required by the client.
Q7: Are your products suitable for both indoor and outdoor substations?
A: These porcelain insulators are primarily designed for outdoor use due to their excellent weather resistance. For indoor applications, alternative specifications with potentially different creepage distances may be available.
Q8: What packaging is used for shipment to prevent damage?
A: Each insulator is individually wrapped and secured within a reinforced wooden crate. This packaging is designed to withstand the rigors of international sea and land freight, ensuring products arrive intact.
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