70 kN Toughened Glass High Voltage Insulator U70C
Product Description
The structural composition of an earth wire disc suspension glass insulator includes several key components. Insulated parts are typically crafted from materials like glass, ceramics, or silicone rubber, known for their excellent insulation performance. Such materials are capable of withstanding high voltages, effectively preventing current leakage to the ground. Specifically, tempered glass insulators offer the characteristic of zero value self-rupture, which simplifies detection. Even after being subjected to lightning burns, the new surface remains a smooth glass body, maintaining sufficient insulation performance and mechanical strength.
Connection fittings are utilized to conjoin insulators to form insulator strings, further connecting them to towers and wires. Commonly, hot-dip galvanized iron caps and steel feet are employed. The hot-dip galvanizing on the surface averts rust and corrosion, ensuring a firm and reliable connection. The push-pull elastic locking pin of the spherical connection structure is available in two forms: W-type and R-type, both made of copper material, offering excellent elasticity and corrosion resistance, and facilitating easy assembly and disassembly.
Product Variants
- Standard Type
- Pollution Resistant Type
- DC Type
- Spherical Type
- Aerodynamic Type
- Ground Wire Type
- Contact Network for Electrified Railways
Jiangxi Huayao Electric Co., Ltd. produces standard type glass insulators ranging from 40-550kN, pollution resistant types from 70-400kN, multi-umbrella types from 120-330kN, and aerodynamic types from 120-300kN.
Technical Specifications
| Model Number | Diameter D (mm) | Spacing H (mm) | Creepage Distance L (mm) | Size of Coupling (mm) | Mechanical Failing Load (kN) | Power Frequency Withstand Voltage WET (kV) | Net Weight per Unit (kg) |
|---|---|---|---|---|---|---|---|
| U70C | 200 | 210 | 220 | 16C | 70 | 30 | 4.5 |
| U70CN | 200 | 210 | 220 | 16C | 70 | 30 | 4.5 |
Working Principle
The earth wire disc suspension glass insulator performs two main functions:
- Insulation: It is predominantly utilized in high-voltage overhead transmission and distribution lines to uphold insulation between the ground wire and the tower, preventing current leakage and ensuring the power system's normal operation while bearing electrical and mechanical stresses during line operation.
- Pollution Resistance: The design increases the creepage distance and uses special umbrella-shaped structures to enhance insulation performance in polluted environments, reducing pollution flashover risks.
Application Scenarios
- High voltage transmission lines, including 110kV, 220kV, and 500kV lines
- Areas with severe pollution like industrial, chemical, saline-alkali, and coastal environments
- Regions with foggy weather conditions
Production Process
The production process at Jiangxi Huayao Electric Co., Ltd involves the following steps:
- Mix raw materials
- Melt glass liquid
- Press to glass insulator shape
- Tempering treatment
- Cold and shock test
- Glue assembly
- Routine and other tests
- Finished products package
Standards and Certification
The tests are conducted following the guidelines of:
- GB/T1001.1-2021
- GB/7253-2019
- IEC 60383-1:2023
- IEC 60120:2020
Jiangxi Huayao Electric Co., Ltd strictly complies with the above standards, ensuring high-quality factory test reports.
Packaging and Delivery
The glass insulators are securely packaged in standard export wooden cases, available in non-fumigation wooden boxes. The daily production output is 10,000 pieces, and the minimum order quantity is 10 pieces. Products are shipped from Ningbo or Shanghai ports, with a supply capacity of 50,000 pieces.
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