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Help CenterToughened Glass Suspension Insulator, 160kn, Double Shed, Suitable for Heavy Pollution Areas, in Stock
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In power transmission and distribution systems, line insulators are exposed to harsh environments such as industrial pollution, salt spray, and dust for extended periods. Pollution flashover accidents are one of the core pain points affecting power supply reliability. Traditional insulators, due to insufficient creepage distance and poor self-cleaning properties, are prone to increased surface leakage current and local arc development in heavily polluted areas, eventually leading to flashover or even fracture, causing large-scale power outages. Additionally, insufficient mechanical strength or the risk of brittle fracture after aging also poses a threat to line safety. To address these industry challenges, Hejian Haokang Electric Co., Ltd., as a professional enterprise specializing in the R&D and production of insulators, leveraging years of industry experience, has launched the Tempered Glass Suspension Insulator (160kN Double Shed), through targeted improvements in glass formulation and shed structure using selected raw materials and optimized processes. The double shed design significantly increases the creepage distance and utilizes the air gaps between sheds to enhance self-cleaning capability, effectively reducing the adhesion and accumulation of pollutants. The tempered glass material provides stable and reliable mechanical strength, combined with strict heat treatment processes, enabling the product to perform excellently under complex conditions such as heavy pollution, temperature differences, and wind vibration. This product is now available in bulk stock and can quickly respond to the urgent needs of line renovation and new construction projects in heavily polluted areas.
Working Mechanism and Product Features
- Mechanical Support and Electrical Insulation: The suspension insulator connects through metal caps, steel feet, and glass components, supporting the conductor and bearing combined loads such as conductor weight, ice, and wind. The tempered glass components undergo internal stress treatment, providing high tensile strength, maintaining reliable bearing capacity under 160kN mechanical load, and the glass surface has a compressive stress layer that effectively inhibits micro-crack propagation, reducing the risk of fracture during operation.
- Advantages of Double Shed Structure: The shed uses a two-layer upper and lower shed, increasing the creepage distance (typical value 550mm), while the gaps between sheds facilitate rain washing and natural wind cleaning, reducing long-term accumulation of pollutants on the shed surface. In heavily polluted areas (such as near chemical plants, coastal areas, and cement plants), this structure can significantly improve pollution flashover voltage and extend cleaning cycles.
- Controllable Self-Explosion Characteristics of Tempered Glass: Glass insulators may undergo 'self-explosion' during use if there are internal impurities or uneven stress. Our company controls the self-explosion rate within an industry-acceptable range through raw material selection, melting process control, and automatic detection. After self-explosion, the glass fragments are fine particles that do not damage the conductor when falling, making it easy for inspection and replacement.
Technical Specifications (Typical Values, subject to product drawings)
| Parameter Name | Value |
| Nominal Diameter | 320 mm |
| Structure Height | 170 mm |
| Creepage Distance | 550 mm |
| Lightning Impulse Withstand Voltage (Full Wave) | 125 kV |
| Power Frequency Wet Withstand Voltage | 50 kV |
| Mechanical Failing Load | ≥ 160 kN |
| Insulator Type | Suspension Toughened Glass Double Shed |
| Applicable Pollution Class | Class III to IV (Heavy Pollution Area) |
Product Advantages
- High mechanical reliability: 160kN mechanical strength meets the requirements for large-tonnage insulators on lines up to 220kV, and the tensile strength consistency of toughened glass is superior to ordinary porcelain.
- Superior anti-pollution flashover performance: The double shed design, combined with a large creepage distance, effectively delays pollution flashover in heavily polluted areas and reduces line maintenance frequency.
- Good self-cleaning and easy detection: The smooth glass surface is not prone to contamination; zero-value detection is simple. If self-explosion occurs during operation, the remaining parts still retain a certain insulation capability, and the fragments are easy to identify.
- Stock availability and fast delivery: Hejian Haokang Electric Co., Ltd. maintains ready stock of common models to meet urgent engineering needs and reduce customer waiting time.
Company Strength and Trust Endorsement
Hejian Haokang Electric Co., Ltd. has focused on the insulator industry for many years. Its products cover glass insulators, porcelain insulators, composite insulators, and other series. The production line is equipped with mature heat treatment and testing equipment. In glass insulator production, we strictly implement incoming raw material inspection, process control, and finished product sampling tests to ensure that each batch of products conforms to national standards (GB/T 1001.1) and industry specifications. We have provided stable supply to many power engineering companies and grid operation and maintenance units, and our products are exported to multiple countries and regions. The company always bases itself on quality, values customer feedback, and implements quality tracking service for products. We are fully aware of the special requirements of insulators for lines in heavily polluted areas, so we integrate the anti-pollution flashover concept from the design stage, ensuring that customers can buy with confidence and use with peace of mind.
Consultation Suggestions
If you are facing difficulties in selecting insulators for lines in heavy pollution areas, or need a specific technical solution for 160kN class double-shed glass insulators, please provide site information such as pollution level, line voltage, tower type, etc. Our technical staff can perform selection calculations and provide matching recommendations for you. We do not make exaggerated claims; we speak only with actual product performance and data. We sincerely look forward to communicating further with you to jointly improve the safety level of line operation.
FAQ (Frequently Asked Questions)
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1. Compared with ordinary single-shed glass insulators, how much improvement in anti-pollution flashover performance can double-shed glass insulators provide in heavy pollution areas?
The double-shed structure increases the creepage distance by about 30% to 40%. Meanwhile, the airflow between the upper and lower sheds accelerates surface drying, and the pollution flashover voltage is usually increased by 20% to 35%. In pollution areas of class III and above, this improvement can significantly reduce the probability of pollution flashover trips and reduce cleaning and maintenance costs. -
2. Is 160kN mechanical strength sufficient for 220kV transmission lines?
Yes. The rated mechanical load of common insulators used on 220kV lines is 160kN, 210kN, etc. The 160kN class meets the safety factor requirement (usually ≥2.5) under common span lengths and conductor types. The specific selection should be based on line tension calculations; Hejian Haokang Electric Co., Ltd. can provide selection parameters accordingly. -
3. How is the self-explosion rate of toughened glass insulators controlled? Does it affect continuous power supply?
In the industry, the self-explosion rate of high-quality glass insulators is generally controlled within 0.2% to 0.5%. Through incoming raw material inspection, stable furnace temperature control, and stress uniformity testing, Hejian Haokang Electric Co., Ltd. reduces the self-explosion rate to a low level. Even if self-explosion occurs, glass fragments will not damage conductors, and the remaining steel cap can still bear part of the load, allowing operators to replace the insulator in a planned manner without immediately causing a power outage. -
4. When using double-shed insulators in heavy pollution areas, is it necessary to install additional anti-pollution flashover measures?
Usually the double-shed structure itself significantly increases the creepage distance and can be used alone for class III pollution areas. If the pollution is extremely heavy (e.g., adjacent to chemical plant discharge outlets or direct seawater splashing), anti-pollution flashover coatings or additional insulator units can be applied. The specific design should follow the pollution area distribution map. -
5. Has this product passed type tests conducted by national authoritative institutions?
The product is designed, manufactured, and factory-tested in accordance with GB/T 1001.1. A type test report issued by a third-party testing institution can be provided (please confirm when placing an order). Hejian Haokang Electric Co., Ltd. ensures that the product meets the mechanical, electrical, and thermal performance requirements specified in the standard.
Regular 160kN double-shed glass insulators are kept in stock; the minimum order quantity is negotiable (usually orders of 500 pieces or more can be shipped at stock price). Special requirements (such as changing hardware dimensions) require customization, and the lead time will be determined separately based on the workload.
Under normal operating conditions, the designed service life is over 30 years. During operation, the insulation condition is judged by regular zero-value tests (using a spark gap detector). When the zero-value ratio exceeds the specified value or large-area self-explosion of glass parts occurs, overall replacement should be considered.
Under the same creepage distance, glass insulators have smooth surfaces, good hydrophilicity, and strong self-cleaning ability, so their pollution flashover voltage is usually slightly higher than that of ordinary porcelain insulators. In addition, glass insulators are convenient for zero-value detection and are more economical to maintain. However, it should be noted that the impact resistance of glass insulators is slightly lower than that of porcelain, so hard object impacts should be avoided during installation and transportation.
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