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Similar to ordinary disc-shaped suspended toughened glass insulators, it consists of an iron cap, a toughened glass component, and a steel foot, and is bonded together with a cement adhesive. It adopts an internationally advanced cylindrical head structure, with small head size and light weight, while maintaining high strength and a large creepage distance, saving metal materials and reducing line construction costs.
Keywords:
U100CN
Product Details
Structural Features
Basic Structure: Similar to ordinary disc-type suspension toughened glass insulators, it consists of an iron cap, toughened glass components, and a steel foot, cemented together with cement adhesive. It adopts an internationally advanced cylindrical head structure, with small head size and light weight, while maintaining high strength and a large creepage distance, saving metal materials and reducing line construction costs. To meet the needs of live-line work, the traditional domestic structural shape is adopted on the cap edge.
Toughened Glass Components: Glass components usually have good mechanical strength and insulation performance, capable of withstanding the mechanical tensile and electrical stress applied by the ground wire. Its smooth surface helps reduce the accumulation of dust and dirt, and it has a certain self-cleaning ability.
Performance Characteristics
1. Self-destruction at Zero Value: It has the characteristic of self-destruction at zero value. When defects or aging occur inside the insulator, causing the insulation performance to drop to a certain level, the glass component will automatically break. Operation and maintenance personnel can observe this from the ground or a helicopter, eliminating the need for pole climbing and individual inspection, reducing labor intensity, and facilitating the timely discovery and replacement of damaged insulators, ensuring the safe operation of the line.
2. Electrical Performance: It can withstand the working voltage and various overvoltages of the ground wire, has good insulation performance, and can effectively prevent flashover between the ground wire and the tower. At the same time, due to the large dielectric constant of glass, the ground wire type disc-type suspension toughened glass insulator has a large main capacitance, and the voltage distribution in series is more uniform, which helps to reduce the voltage withstood by the insulators near the conductor side and the grounding side, reducing radio interference and corona loss.
3. Mechanical Performance: It has high mechanical strength and can withstand the tensile force generated by the ground wire due to its own weight, wind, icing, etc., as well as mechanical stresses such as vibration and impact during line operation, ensuring that it will not be damaged due to mechanical reasons during long-term operation.
4. Environmental Resistance: It has good arc resistance and vibration resistance. After being burned by lightning during operation, the new surface is still a smooth glass body, and there is a toughened internal stress protection layer, which can maintain sufficient insulation performance and mechanical strength. In addition, glass insulators are not easy to accumulate dirt and are easy to clean, have good self-cleaning properties, are not easy to age, and can adapt to different environmental conditions, such as high temperature, low temperature, humidity, and dust.
Application Scenarios
Mainly used in the ground wire system of high-voltage overhead transmission lines, used to achieve insulation and fixation between the ground wire and the tower, ensuring the normal operation of the ground wire, and improving the safety and reliability of the transmission line. Suitable for transmission lines of various voltage levels, especially in polluted areas, areas with frequent lightning activity, and high-altitude areas, the performance advantages of ground wire type disc-type suspension toughened glass insulators can be fully utilized, effectively reducing the occurrence rate of ground wire insulation failures, reducing line maintenance costs and power outage time.
Main Technical Parameters of Ground Wire Type Disc-Type Suspension Toughened Glass Insulator
| Structural Type | Product Model | 20mm Gap Power Frequency Discharge Voltage (kV) | 15mm Gap 2500V Extinction Arc Capacity (No less than) | Electrode Arc Resistance (No less than) | Power Frequency Breakdown Withstand Voltage | ||||
| Ground Wire Type | Upper Limit | Lower Limit | Inductive Current (KA) | Capacitive Current (KA) | Power Frequency Current (kA) | Time (s) | Number of Times | ||
| U70C | 30 | 8 | 35 | 20 | 10 | 0.2 | 2 | 130 | |
| U70CN | 30 | 8 | 35 | 20 | 10 | 0.2 | 2 | 130 | |
| U100C | 30 | 8 | 35 | 20 | 10 | 0.2 | 2 | 130 | |
| U100CN | 30 | 8 | 35 | 20 | 10 | 0.2 | 2 | 130 | |
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