[email protected]
Home > Standard Type > High-Quality 120kN High Voltage Transmission Line U120BS Cap and Pin type Toughened Disc Glass Insulator Manufacturer, Suppliers
High-Quality 120kN High Voltage Transmission Line U120BS Cap and Pin type Toughened Disc Glass Insulator Manufacturer, Suppliers
High-Quality 120kN High Voltage Transmission Line U120BS Cap and Pin type Toughened Disc Glass Insulator Manufacturer, Suppliers
High-Quality 120kN High Voltage Transmission Line U120BS Cap and Pin type Toughened Disc Glass Insulator Manufacturer, Suppliers
High-Quality 120kN High Voltage Transmission Line U120BS Cap and Pin type Toughened Disc Glass Insulator Manufacturer, Suppliers
High-Quality 120kN High Voltage Transmission Line U120BS Cap and Pin type Toughened Disc Glass Insulator Manufacturer, Suppliers
1 / 5
High-Quality 120kN High Voltage Transmission Line U120BS Cap and Pin type Toughened Disc Glass Insulator Manufacturer, Suppliers
High-Quality 120kN High Voltage Transmission Line U120BS Cap and Pin type Toughened Disc Glass Insulator Manufacturer, Suppliers
High-Quality 120kN High Voltage Transmission Line U120BS Cap and Pin type Toughened Disc Glass Insulator Manufacturer, Suppliers
High-Quality 120kN High Voltage Transmission Line U120BS Cap and Pin type Toughened Disc Glass Insulator Manufacturer, Suppliers
High-Quality 120kN High Voltage Transmission Line U120BS Cap and Pin type Toughened Disc Glass Insulator Manufacturer, Suppliers

High-Quality 120kN High Voltage Transmission Line U120BS Cap and Pin type Toughened Disc Glass Insulator Manufacturer, Suppliers

Discover the QOCI Electric U120BS glass insulator, engineered for optimal performance in electrical grid stability. Our glass insulators are essential for maintaining the safe and efficient operation of power systems, specifically designed to isolate and support conductors in high-voltage environments, Crafted from high-quality tempered glass, the U120BS insulator provides exceptional resistance to environmental stresses, ensuring durability and reliability in various applications. Choose QOCI Electric's U120BS glass insulator for a robust, long-lasting solution that guarantees strength and performance in your electrical systems. Elevate your grid stability today!

Send Inquiry

Product Description

Product Information

U120BS Suspension Insulator

Model: U120BS

  • U: Disc Suspension Insulator
  • 120: Rated Mechanical failing load of 120kN
  • B: Ball And Socket Type
  • S: Short Steel Foot
  • 127: Structure height 127mm (146mm options available)
  • 255: Disc diameter 255mm (up to 420mm options available)
  • 320: Creepage distance 320mm (up to 550mm options available)
  • Type: Standard profile Toughened Suspension Type
  • Rated mechanical load: 120kn (approximately 12 tons)
  • Purpose: Insulation support for medium and high voltage transmission lines and substation equipment across all climates.
  • Standards: IEC60383-1:1993, GB/T1001.1, GB/T4056-2008, BS 3288 part III.
  • Locking: W-pin (standard for U120BS) or R-pin available upon request.

Product Drawing

Technical Drawing

Product Parameters

IEC Designation Unit U120BS/127 U120BL/146
Mechanical failing load kN 120 120
Diameter D mm 255 255
Height H mm 127 146
Creepage distance L mm 320 320
Socket coupling mm 16 16
Wet power frequency withstand voltage kV 40 40
Dry lightning impulse withstand voltage kV 100 100
Power frequency puncture voltage kV 130 130
Radio interference voltage (10kV 1MHz) μv 50 50
Corona visual test kV 18/22 18/22
Power frequency electric arc voltage ka 0.12s/20Ka 0.12s/20Ka
Impulse puncture voltage P.U 2.8 2.8
Net weight per unit kg 4 4

Suspension Insulator Components

Components Diagram

Suspension insulators consist of:

  • Dielectric made of toughened glass with specific properties for diverse environments.
  • Hot-dip galvanized nodular or ductile malleable cast iron cap.
  • Hot-dip galvanized forged steel pin.
  • Aluminous cement assembly for superior thermomechanical strength.
  • Stainless steel or phosphor bronze locking device (split pin).
  • Optional anti-corrosion zinc sleeve (sacrificial anode) for heavy pollution areas.

Glass Insulator Shell Cross-section

Under long-term electrical stress, contaminants can trigger local arcs. Our design provides sufficient creepage distance to disperse electric field strength, reducing electrocorrosion risk and extending service life.

Cross-section measurement

Warehouse & Packaging

Warehouse Stock
Export Packaging

Frequently Asked Questions

What does the U120BS designation stand for?
The "U" indicates a disc suspension insulator, "120" refers to the 120kN rated mechanical load, "B" denotes the ball and socket connection, and "S" stands for the short steel foot design.
Which international standards do these insulators comply with?
Our products are manufactured in strict accordance with IEC60383-1:1993, GB/T1001.1, and BS 3288 part III, ensuring global compatibility and safety.
What is the advantage of using toughened glass?
Toughened glass provides excellent dielectric properties and high mechanical strength, allowing the insulator to operate stably under extreme climatic conditions and long-term electrical stress.
Can these insulators be used in highly polluted environments?
Yes, we recommend using the optional anti-corrosion zinc sleeve (sacrificial anode) on the pins for installations in heavily polluted areas to prevent corrosion and extend life.
What locking pins are available for the coupling?
We offer both W-pin and R-pin locking devices made of stainless steel or phosphor bronze. Unless specified otherwise, the U120BS model is supplied with a W-pin.
How does creepage distance impact performance?
Adequate creepage distance (320mm for U120BS) helps disperse electric field strength, which minimizes the risk of local discharges and surface carbonization caused by contaminants.

Related Products

China 70kn High Voltage Glass Insulator CTV 254 Isolator En Verre U70BL Supplier, Factory

China 70kn High Voltage Glass Insulator CTV 254 Isolator En Verre U70BL Supplier, Factory
High-Quality High Voltage Suspension Insulator U160BL Toughed Glass Insulator for Transmission Line Manufacturers, Factory

High-Quality High Voltage Suspension Insulator U160BL Toughed Glass Insulator for Transmission Line Manufacturers, Factory
China U40B Glass Insulator CTV175 for HVDC Overhead Transmission Line Manufacturer, Factory

China U40B Glass Insulator CTV175 for HVDC Overhead Transmission Line Manufacturer, Factory
High-Quality U100BS 100kN Standard Type Toughened Glass Insulator Manufacturers, Suppliers

High-Quality U100BS 100kN Standard Type Toughened Glass Insulator Manufacturers, Suppliers
Wholesale PS-70E Toughened Suspension Glass Insulator Supplier, Factories

Wholesale PS-70E Toughened Suspension Glass Insulator Supplier, Factories
High-Quality U70BL/255/146/320 IEC Standard profile 70kn suspension Tempered glass Insulator CTV254 Manufacturers, Suppliers

High-Quality U70BL/255/146/320 IEC Standard profile 70kn suspension Tempered glass Insulator CTV254 Manufacturers, Suppliers
Wholesale U70BS/255/127/320 IEC Standard profile 70kn suspension Tempered glass Insulator CTV254 Manufacturer, Factory

Wholesale U70BS/255/127/320 IEC Standard profile 70kn suspension Tempered glass Insulator CTV254 Manufacturer, Factory
Wholesale U40BL/175/127/190 IEC Standard profile 40kn suspension Tempered glass Insulator CTV 175 Isolator En Verre U40b Manufacturer, Supplier

Wholesale U40BL/175/127/190 IEC Standard profile 40kn suspension Tempered glass Insulator CTV 175 Isolator En Verre U40b Manufacturer, Supplier
High-Quality Good Quality High Voltage 100kN Disc Suspension Toughened Glass Insulator U100BS Manufacturers, Factory

High-Quality Good Quality High Voltage 100kN Disc Suspension Toughened Glass Insulator U100BS Manufacturers, Factory
High-Quality 100KN U100BL Suspension Glass insulators Ball and socket type Manufacturer, Supplier

High-Quality 100KN U100BL Suspension Glass insulators Ball and socket type Manufacturer, Supplier