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Help CenterGlass Insulator, Tempered Glass, Disc Suspension Type, 160kn, Suitable for High-voltage Transmission, Spot Wholesale
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Industry Pain Points and Solutions In current high-voltage transmission lines, the reliable operation of insulators is directly related to grid safety. Traditional porcelain insulators after long-term operation are prone to aging, cracking, zero-value problems, etc., and are difficult to detect by visual inspection, leading to a high risk of flashover accidents; composite insulators have hidden dangers such as core rod aging and decreased interfacial hydrophobicity. Glass insulators, due to their “zero-value self-explosion” characteristic—when defects exist inside the glass, the tempering stress causes the insulator to automatically shatter into uniform fragments, allowing inspection personnel to visually identify and replace them, effectively avoiding fault escalation. However, some glass insulators on the market suffer from a high self-explosion rate or insufficient strength due to unstable tempering processes. Hejian Haokang Electric Co., Ltd., with years of insulator manufacturing experience, uses selected high-purity glass raw materials and strict tempering heat treatment to ensure low self-explosion rate, high mechanical strength, and excellent thermal shock resistance, effectively solving the pain points in transmission line operation and maintenance.
Working Mechanism, Product Features and Technical Specifications The working principle of this disc-suspension toughened glass insulator is based on the prestressed structure of tempered glass: the glass is heated to its softening point and then rapidly cooled, creating compressive stress on the surface and tensile stress inside. When there are tiny defects inside the glass or mechanical stress beyond the limit is applied, the tensile stress zone rapidly expands, causing the entire insulator to self-explode into small fragments without sharp edges, avoiding puncture damage. This feature enables line patrol personnel to detect and replace insulators in a timely manner without power outage, greatly improving power supply reliability. The product adopts a disc (cap) shape structure, connected to conductors and towers via metal cap and steel pin, with a rated mechanical load of 160kN, suitable for 110kV, 220kV and higher voltage transmission lines.
- High Mechanical Strength: Rated electromechanical failure load reaches 160kN, meeting the high-tension requirements of high-voltage lines.
- Self-Explosion Easy to Detect: Self-destructing zero-value protection, no need for special detection instruments.
- Excellent Thermal Shock Resistance: Withstands ambient temperature changes from -40℃～+90℃ without bursting.
- Pollution Resistance and Self-Cleaning: The glass surface is smooth, not easy to accumulate dirt, and has good self-cleaning performance in rain.
- Long-Term Stability: After tempering, the surface compressive stress is uniform, no aging problems, and service life can reach over 30 years.
- In-Stock Wholesale: Regular inventory, fast delivery, and support customization of various connection dimensions.
| Parameter Item | Typical Value |
| Model | U160B / LXY-160 |
| Nominal Structural Height | 170 mm |
| Disc Diameter | 320 mm |
| Creepage Distance | 450 mm |
| Connection Structure Marking | 16 (Ball-and-socket connection) |
| Rated Mechanical Load | 160 kN |
| Power-frequency Wet Withstand Voltage | 50 kV (reference) |
| Full Lightning Impulse Withstand Voltage | 130 kV (reference) |
| Unit Weight | Approx. 4.5 kg |
| Reference Standard | GB/T 1001.1 |
The above parameters are typical design values; actual values are subject to ex-factory measurements. This product can be customized with adjusted connection dimensions and accessories such as grading rings to suit different tower types and conductor configurations.
Company Advantages and Trust Endorsement Hejian Haokang Electric Co., Ltd. has specialized in insulator manufacturing for many years. Our product range covers the full series including glass insulators, ceramic insulators, composite insulators, and station porcelain, providing customers with one-stop selection and matching services. The company possesses mature production processes and strict quality inspection procedures. All products undergo multiple tests including mechanical load testing, thermal stability testing, and withstand voltage testing before shipment to ensure reliable performance. We not only offer standard specification stock items but also can customize non-standard products based on engineering drawings. With short lead times from order to delivery, we can provide timely supply for projects with tight schedules. We welcome professionals from power construction, grid operation and maintenance units, and traders to visit our factory or contact us for consultation. We will recommend the most suitable insulation solutions with professional technical support.
FAQ – Common Questions from Professional Buyers
Q1: What is the approximate self-shattering rate of glass insulators in service? Will it affect line operation?A1: Hejian Haokang Electric Co., Ltd. uses high-quality raw materials and precision tempering processes to control the self-explosion rate at an extremely low level, far better than the industry average. Even if self-explosion occurs, the insulator fragments are uniform and small and do not endanger the conductor and ground wire. They can be uniformly replaced during the planned maintenance period without affecting continuous power supply, and instead avoid the risk of operating with zero-value insulators.
Q2: What voltage levels is this type of insulator suitable for? Is a grading ring required? A2: 160kN class disc suspension glass insulators are generally used for 110kV to 220kV lines, and can meet different pollution level requirements based on creepage distance and string length. When the voltage level is higher than 220kV or used for tension strings, it is recommended to add grading rings to optimize the electric field distribution. We can provide matching grading rings and installation guidance.
Q3: How to ensure the mechanical performance of insulators does not degrade during long-term operation? A3: Tempered glass insulators have no internal air gaps and do not have moisture absorption aging issues. The metal fittings are treated with hot-dip galvanizing for corrosion protection and are mechanically locked firmly with the glass parts. Under normal use conditions, mechanical strength remains stable for 30 years without the need for regular replacement.
Q4: What are the precautions for transportation and storage? A4: Glass insulators should be protected from strong impact and vibration. Packaging uses wooden boxes or iron-framed boxes with spacers between individual units. Store in a dry and ventilated place, avoiding contact with acidic or alkaline chemicals. Install promptly after opening the packaging to avoid prolonged exposure.
Q5: What are the comprehensive advantages of glass insulators compared to porcelain insulators? A5: The zero-value self-explosion characteristic of glass insulators eliminates the need for manual zero-value detection, reducing maintenance costs. They are lighter for the same creepage distance, making them easier to transport and install. The glass surface is slightly more hydrophobic than porcelain, resulting in higher pollution flashover voltage. The price is comparable to porcelain insulators, offering excellent cost-effectiveness.
Q6: Can your company provide third-party type test reports? A6: Hejian Haokang Electric Co., Ltd. products are designed, manufactured, and tested according to national standards and IEC standards, and we can provide factory inspection reports for corresponding batches. If needed, we can also commission a third-party authoritative organization for sampling type tests, with costs negotiated by both parties.
Q7: Can we purchase a small number of samples for testing? What is the minimum order quantity? A7: We support providing 5 to 10 samples for type tests or trial operation. Sample fees are charged at cost. There is no fixed minimum order quantity for formal orders, but larger batch sizes result in better delivery times and prices. For in-stock products, the minimum order is 1 piece.
Q8: Does your company have special products for heavy pollution areas along the coast?
A8: For areas with high pollution or coastal regions, we can provide glass insulators with extended creepage distance (e.g., nominal creepage distance 550mm), featuring a large shed structure, which effectively increases the pollution flashover voltage. Additionally, surface treatment with RTV anti-pollution flashover coating can be applied. Please write to us to request the technical solution.
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