The U70BLP Double Shed Anti-Fog Glass Disc Insulator is engineered for high-voltage transmission lines operating in severe contamination environments. With a 70kN mechanical failing load and extended 450mm creepage distance, it delivers reliable glass insulation performance in coastal, desert, and heavy industrial areas.
Manufactured from toughened low-alkali glass and assembled with hot-dip galvanized cap and forged steel pin, this model is widely used in 110kV–220kV overhead transmission systems.
Product Description
High voltage Double Shed Antifog Type Toughened Glass Insulator Specification | ||||
| IEC designation | U70BLP | U100BLP | U120BLP | |
| Diameter | mm | 280 | 280 | 280 |
| Socket coupling | mm | 146 | 146 | 146 |
| Creepage distance | mm | 450 | 450 | 450 |
| Socket coupling | mm | 16 | 16 | 16 |
| Mechanical failing load | KN | 70 | 100 | 120 |
| Wet power frequency withstand voltage | kV | 50 | 50 | 50 |
| Dry lightning impulse withstand voltage | kV | 125 | 125 | 125 |
| Impulse puncture voltage | P.U | 2.8 | 2.8 | 2.8 |
| Power frequency puncture voltage | kV | 130 | 130 | 130 |
| Radio influence voltage | μv | 50 | 50 | 50 |
| Corona visual test | kV | 18/22 | 18/22 | 18/22 |
| Power frequency electric arc voltage | ka | 0.12s/20ka | 0.12s/20ka | 0.12s/20ka |
| Net weight per unit | kg | 5.8 | 5.8 | 5.8 |
The double shed aerodynamic profile increases effective leakage distance and reduces contamination accumulation. Compared to standard profile discs, this structure:
Enhances pollution flashover resistance
Improves performance under salt fog conditions
Reduces surface leakage current during high humidity
Provides better self-cleaning under rainfall
Transmission networks in coastal and industrial regions—similar to systems operated by National Grid and State Grid Corporation of China—require extended creepage solutions such as the U70BLP model.
With a 70kN mechanical failing load, U70BLP is suitable for medium-span transmission towers and standard conductor configurations.
It offers:
High tensile load resistance
Stable performance under wind pressure
Compatibility with suspension and strain hardware
Safe operation in vibration-prone environments
For EPC contractors managing large-scale grid expansion projects, mechanical consistency across batches is essential for string assembly efficiency and structural safety.
The toughened glass dielectric unit provides:
In case of internal defect, the glass disc shatters visibly while remaining mechanically secured, enabling fast inspection during maintenance patrols.
Low-alkali glass ensures consistent dielectric strength and long-term aging resistance.
Metal fittings are hot-dip galvanized to ensure long service life in humid or coastal conditions.
These characteristics make U70BLP particularly suitable for:
Coastal transmission corridors
Industrial pollution zones
Desert grid systems
Rural electrification upgrades
Major transmission projects executed by EPC firms such as Power Construction Corporation of China and energy solution providers like Siemens Energy require standardized insulator dimensions and stable supply capability.
Electric Powertek supports project-scale procurement with:
Strict dimensional tolerance control
Routine mechanical and electrical testing
Galvanization thickness inspection
Export-standard packaging
Full documentation and test reports
Large-volume production ensures consistent delivery schedules for infrastructure projects across the Middle East, Africa, Asia, Europe, and the Americas.
U70BLP Double Shed Anti-Fog Glass Disc Insulator is commonly applied in:
110kV transmission lines
132kV overhead systems
220kV grid networks (depending on string configuration)
Insulator strings can be configured based on system voltage and pollution severity classification.
Integrated R&D and manufacturing facility
Experience serving international transmission markets
One-stop sourcing for insulators and overhead line hardware
Stable bulk supply capability
Reliable quality control for infrastructure-scale orders
U70BLP Double Shed Anti-Fog Glass Disc Insulator is a proven solution for high-contamination transmission environments where electrical reliability and mechanical safety are critical.
Application
Testing
Packing&Delivery
Cooperative Client
Our cooperative client are all over the world and our products are very popular all over the world. Many products are exported to Russia, USA, Australia, Canada, South Africa, Kenya, Tanzania, Zambia, Brazil and Argentina. Chile, Southeast Asian countries and other international markets. With first-class technical ability and perfect pre-sale and after-sales service guarantee system, we have established a good reputation between enterprises and users.
FAQ
Q: Do you provide sample service?
A: Yes, we only provide samples and ask for one piece at a time. The freight should be borne by you.
Q: Do you support customized services？
A: Yes, we can customize the size and logo according to your needs. Please consult the customer service for the specific minimum order quantity.
Q: How is the Design & Engineering?
A: Experienced and skilled team of designers including CAD designers and 3D designers has the capacity to deliver outstanding designs for your project. If you require more complex engineering of structures such as overhead transmission and distribution lines design,we can also provide this service also designer fee .
Q: What's the payment term?
A: We accept T/T, L/C, West Union.
Q: What's the delivery time?
A: Usually within 7-15 days according to quantities
Q: What's the standard of package?
A: Export standard package or special package as the requirement of customers.
Q: What kind of product quality your factory offer?
A: Our products with both excellent quality and competitive price. And we offer free sample for your reference.
Q: What kind of certificate you have?
A: We have ISO9001:2008
