Standard Disc-Type Suspension Glass Insulators
Standard glass insulators are a common type suitable for general transmission environments. They offer excellent insulation properties and mechanical strength, capable of withstanding both working voltages and overvoltage effects. Additionally, they can bear the vertical load, horizontal load, and tension of conductors. Standard glass insulators feature relatively small creepage distances, making them suitable for areas with minimal light pollution.
The glass disc suspension insulator is a foundational component within the broader category of glass electrical insulators, designed to provide reliable insulation and mechanical support for conductors in power transmission lines. The standard type is engineered for general transmission environments, offering a balanced combination of electrical insulation, mechanical strength, and economic efficiency. Each unit is capable of withstanding working voltages, overvoltage effects, and the vertical, horizontal, and tension loads of conductors.
Weixiao manufactures these high-performance insulators with precision and also offers comprehensive customization services to meet specific project requirements.
Each glass disc suspension insulator is assembled from three primary components:
Tempered glass component – Provides the core electrical insulation and offers the self-breaking characteristic for easy fault detection
Iron cap – Provides mechanical connection and protection for the glass component
Steel foot – Serves as the attachment point for the conductor or adjacent insulator
During assembly, a soft gasket is placed at the top of the steel foot, and an asphalt layer is applied where the iron cap inner cavity contacts the cement adhesive. These elements buffer thermal expansion and contraction, preventing damage during temperature fluctuations and ensuring long-term structural integrity.
| The specifications of toughened glass suspension insulator of standard type | |||||||||||||||
| Model NO | Mechanical Failing load ≥ |
Nominal Spacing Height |
Nominal Diameter |
Min Nominal Creepage distance |
Connection type |
Individual tensle load test |
Dry lightning impulse withstan dvoltage |
Impulse Puncture Withstan d voltage |
Power Frequency Voltage (virtual value)≥ |
Radio interfer ence voltage |
Corona extinctio nvoltage pin/cap |
Power frequency art test |
Net weight unit |
||
| mm | Power frequenc y dry withstan d voltage |
with stand voltage (1min) |
punct ure |
||||||||||||
| U40B/110 | 40 | 110 | 175 | 200 | 11 | 20 | 75 | 2.8 | 55 | 30 | 90 | ≤50 | 18/22 | 0.12/20kA | 2.1 |
| U70BL/146 | 70 | 146 | 255 | 320 | 16 | 35 | 100 | 2.8 | 70 | 40 | 130 | ≤50 | 18/22 | 0.12/20kA | 3.6 |
| U70BS/127 | 70 | 127 | 255 | 320 | 16 | 35 | 100 | 2.8 | 70 | 40 | 130 | ≤50 | 18/22 | 0.12/20kA | 3.5 |
| U100BL/146 | 100 | 146 | 255 | 320 | 16 | 50 | 100 | 2.8 | 70 | 40 | 130 | ≤50 | 18/22 | 0.12/20kA | 4 |
| U100BS/127 | 100 | 127 | 255 | 320 | 16 | 50 | 100 | 2.8 | 70 | 40 | 130 | ≤50 | 18/22 | 0.12/20kA | 4 |
| U120B/146 | 120 | 146 | 255 | 320 | 16 | 60 | 100 | 2.8 | 70 | 40 | 130 | ≤50 | 18/22 | 0.12/20kA | 4 |
| U120BS/127 | 120 | 127 | 255 | 320 | 16 | 60 | 100 | 2.8 | 70 | 40 | 130 | ≤50 | 18/22 | 0.12/20kA | 4 |
| U160BL/170 | 160 | 170 | 280 | 400 | 20 | 80 | 110 | 2.8 | 75 | 45 | 130 | ≤50 | 18/22 | 0.12/20kA | 65 |
| U160B/155 | 160 | 155 | 280 | 450 | 20 | 80 | 110 | 2.8 | 75 | 45 | 130 | ≤50 | 18/22 | 0.12/20kA | 6.3 |
| U160B/155 | 160 | 155 | 280 | 400 | 20 | 80 | 110 | 2.8 | 75 | 45 | 130 | ≤50 | 18/22 | 0.12/20kA | 6.3 |
| U160BS/146 | 160 | 146 | 280 | 400 | 20 | 80 | 110 | 2.8 | 75 | 45 | 130 | ≤50 | 18/22 | 0.12/20kA | 6 |
| U210B/170 | 210 | 170 | 280 | 460 | 20 | 105 | 125 | 2.8 | 85 | 45 | 130 | ≤50 | 18/22 | 0.12/20kA | 6.9 |
| U210B/170 | 210 | 170 | 280 | 400 | 20 | 105 | 110 | 2.8 | 75 | 45 | 130 | ≤50 | 18/22 | 0.12/20kA | 6.9 |
| U240B/170 | 240 | 170 | 260 | 400 | 24 | 120 | 110 | 2.8 | 75 | 45 | 130 | ≤50 | 18/22 | 0.12/20kA | 6.9 |
| U240B/170 | 240 | 170 | 280 | 460 | 24 | 120 | 110 | 2.8 | 85 | 50 | 130 | ≤50 | 18/22 | 0.12/20kA | 7 |
| U300B/195 | 300 | 195 | 320 | 485 | 24 | 150 | 130 | 2.8 | 85 | 50 | 130 | ≤50 | 18/22 | 0.12/20kA | 10.6 |
| U420/205 | 420 | 205 | 360 | 550 | 28 | 210 | 140 | 2.8 | 90 | 55 | 130 | ≤50 | 18/22 | 0.12/20kA | 16 |
| U550B/240 | 550 | 240 | 380 | 620 | 32 | 275 | 145 | 2.8 | 95 | 55 | 130 | ≤50 | 18/22 | 0.12/20kA | 21.5 |
Zero-value self-breaking – Faulty units break visibly, allowing easy detection from the ground without the need for pole-climbing inspections, significantly reducing maintenance costs and labor intensity.
Superior arc and vibration resistance – Maintain sufficient insulation performance and mechanical strength even after lightning strikes or prolonged vibration exposure.
Excellent self-cleaning properties – The smooth glass surface resists dirt accumulation and aging, minimizing contamination-related flashovers.
Uniform voltage distribution – When assembled into strings, these insulators provide balanced voltage distribution, reducing radio interference and corona loss while extending service life.
Long service life – Designed for a minimum of 30 years, with actual service life often reaching 40 to 50 years or more under proper maintenance and favorable environmental conditions.
General transmission environments with minimal pollution, such as plains and rural areas
High-voltage (HV), ultra-high-voltage (UHV), and extra-high-voltage (EHV) AC transmission lines
Situations where reliable insulation and conductor suspension are required without specialized anti-pollution or DC-specific features
Weixiao implements a rigorous quality management system throughout the entire production process:
Raw material inspection – Premium glass raw materials and components are verified upon arrival
Process control – Every stage from batching, molding, and cementing to packaging follows strict process specifications
Certified systems – The company holds ISO 9001:2015 (Quality), ISO 14001:2015 (Environmental), and ISO 45001:2018 (Occupational Health and Safety) certifications
Comprehensive testing – Each batch undergoes testing with specialized laboratory equipment, and inspection reports accompany every consignment
Traceability – A complete product traceability system ensures accountability from production to delivery
Production capacity – With a monthly output of approximately 400,000 units and a full-electric glass melting furnace, the company ensures stable supply and competitive pricing through factory direct sales
Comprehensive range – Products cover mechanical loads from 40KN to 850KN, suitable for AC lines up to 1100kV and DC lines up to ±1100kV
Technical strength – A dedicated R&D center with over 20 testing devices and 20+ technical professionals supports continuous product improvement
Customization capability – For projects requiring specific configurations, the company offers OEM/ODM services based on customer-provided drawings, including custom mold development
Commitment to sustainability – The all-electric melting furnace minimizes environmental impact, aligning with modern green development practices
Everything you need to know. Can't find an answer? Talk to our team.
Subject to mutual agreement
Varies based on order quantity
Wooden crates and bamboo mats.
Customization available.
We utilize premium raw materials and state-of-the-art production equipment. Rigorous quality control, assembly, and packaging processes guarantee product excellence. Every batch undergoes testing with specialized laboratory equipment.
Quality Certification, 3C Certification, Green Certification (covering packaging, factory operations, supply chain, product design, manufacturing, and digital-intelligent green low-carbon practices).
Monthly production reaches 2,100 tons, capable of manufacturing approximately 400,000 tempered glass insulators per month.
We always want to make sure that our customers are getting the best deal, so let us know what you're interested in and we'll get back with a quote!
