U120BS 127 Glass Insulators for OHL Project

U120BS 127 Glass Insulators for OHL Project

U120BS 127 Glass Insulator is a cap-and-pin type tempered glass suspension insulator designed for overhead transmission lines, featuring a 120 kN mechanical rating and 127 mm spacing. The U120BS 127 model is commonly installed in suspension strings for overhead power transmission systems and complies with international standards such as IEC specifications.

Typical features include:

👉Tempered glass dielectric

👉Cap-and-pin suspension design

👉120 kN Specified Mechanical Load (SML)

👉127 mm nominal spacing

👉Corrosion-resistant galvanized steel fittings

👉High mechanical and electrical reliability

It is widely used by utilities, EPC contractors, and transmission line developers for new installations and grid modernization projects.

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OHL U120BS 127 Glass Insulators

U120BS 127 Glass Insulator is one of the most widely specified Overhead Line Glass Insulators for medium- and high-voltage transmission line projects worldwide. Designed with a 120 kN specified mechanical load (SML) and a 127 mm nominal spacing, it provides excellent mechanical strength, superior electrical insulation, and long-term reliability under demanding environmental conditions. 


Glass insulators for OHL projects

For EPC contractors, transmission utilities, and international tender buyers, the U120BS 127 Glass Insulator offers an ideal balance of performance, durability, and cost efficiency. Nooa Electric manufactures IEC-compliant tempered glass insulators that deliver consistent quality, factory-tested performance, and dependable service for overhead transmission line projects across diverse climates.


glass insulator manufacturer-NOOA

What Is a U120BS 127 Glass Insulator?

IEC standard insulators
 U120BS
Specified mechanical load(KN)
 120
Normal spacing H(mm)
 127
Diameter of the insulator part (mm)
 255
Mininum normal creepage distance (mm)
 320
Standard coupling IEC120
 16
Power frequency withstand voltage 5PCS/1pcs
 150kV/40kV
Lightning impulse withstand voltage 5PCS/1pcs
 420kV/100kV
Power frequency puncture voltage
 130kV
Radio influence voltage(10KV,1MHz)
 50μV
Electric iron visual test 
 18kV/22kV
Impulse puncture voltage
 2.8p.μ
Power frequency electric arc voltage
 0.12s/20kA
Net weight / unit 
 4.0Kg


Applications of U120BS 127 Overhead Line Glass Insulators

U120BS 127 Glass Insulators are suitable for transmission and distribution projects requiring dependable mechanical and electrical performance.

Typical applications include:

High-Voltage Transmission Lines
Used in suspension insulator strings supporting conductors on transmission towers.

Utility Grid Expansion Projects
Installed in new overhead line construction and utility infrastructure upgrades.

EPC Turnkey Projects
Preferred by engineering contractors due to consistent quality, international compliance, and simplified procurement.

Renewable Energy Grid Connections
Applied in transmission systems connecting wind farms, solar plants, and hydroelectric facilities to the national grid.

Cross-Country Transmission Networks
Suitable for harsh operating environments including coastal, desert, mountainous, and tropical regions.

Why Choose Nooa Electric?

Nooa Electric supplies high-quality tempered glass insulators for international overhead transmission line projects.

Nooa Electric specializes in manufacturing Overhead Line Glass Insulators for utilities, EPC contractors, and power transmission companies worldwide.

Our advantages include:

IEC-compliant manufacturing
Automated production lines
Toughened glass technology
High-strength galvanized fittings
100% routine inspection
Strict quality control
OEM and customized solutions
Fast delivery for international tenders
Professional technical support
Extensive export experience

Whether supporting utility transmission upgrades or national grid expansion projects, Nooa Electric delivers reliable glass insulator solutions designed for long-term performance.
Company profile

Who We Are?

Nooa Electric Co., Ltd. - Chinese professional electrical glass insulators manufacturer with 21+ experience, covering an area of 70,000 square meters, and construction area is 50,000 square meters. There are more than 200 employees, including 25 technicians. The production capacity 3500000 pieces per year, and now setting up the new kiln and lines up to 10500000 pieces per year. We have been specialized in research and development of latest high-strength functional glass and power transmission insulators, which is the qualified supplier for State Grid Corporation of China and Southern State Grid Corporation of China, and is a participating unit of product standard formulation of the national electrical insulator standard committee.


glass insulators manufacturer


What We Have?

Certificates & Reports: INTERTK, SGS, BV Certificates,Type Test Certificate.

Main Electric Insulators : Standard-type glass insulator (u40(ctv175)/u70(ctv254, ps70e)/u120/u160/u210/u300) , antipollution-type glass insulators (u120bp/u160bsp/u210bp), aerodynamic type glass electrical insulators (ug70bsa/u100bsa/u120bla), multi-umbrella type electric insulators, ground-wires type glass power line insulators (u70cn/u100cn/u120c), post insulator for line, pin glass insulator. Products are mainly used for transmission line insulation, suspension, support, tension conductors. They are divided into 5 major series: The standard type glass insulator 40-550kn, filth-resistant type glass insulators 70-420kn, aerodynamic type glass electrical insulators 120-300kn, multi-umbrella type electric insulators 120-300kn, and ground circuit type high voltage insulators, able to be used for line voltage from 10kv～1000kv.


nooa electric INSULATOR


Core Technology:

Automation Equipment: Siemens fully automatic feeding, stamping, temperature equalization, tempering, hot and cold shock control system.
Independent Product Model: U160BP/146/380/450, U160BP/155/380/450, U210BP/170/420/550 and U300BP/195/420/550.
Advanced Klin: Germany's new generation kiln control system, equipped with brand-new sensors and actuators, and equipped with a high-precision automatic batching system.
Qualification: Passed the quality, environment and occupational health system certification and obtained a number of invention patents.


Goal:

To be the world's largest glass insulators manufacturer.

Glass Insulators Certificates

Are u toughened glass insulators factory or trading company?
China Leading Toughened Glass Insulators Factory With IEC & ISO Certificates. Founded in 2002.
What're your main power insulators?
Powerline Electrical Insulators (40kn-550kn disc glass insulators, porcelain insulators, composite insulators ), the fittings and hardwares of all kinds for high-voltage applications and related products are available.
Can I get some glass insulators samples?
Yes, powerline glass insulator sample order is available for quality check and market test.
What's your payment terms?
We usually accept all kinds of payment terms, T/T, L/C, Western Union.
How can you control your glass power line insulator quality?
For each glass insulator production processing, we have a complete QC system for the chemical composition, physical and electrical properties. After production, all glass power line insulators will be tested according to IEC standards, and the ex-factory test reports will be sent along with shipment documents.
Does your company accept customization?
We accept OEM service.
What's your warranty terms?
We offer 24 months warranty terms.
Do you have glass electrical insulators in stock?
Depends on your request, we have standard models (CTV254 & CTV175, U40B U70B U120B U160BL U240B U300B ) in stock and ship within 1 month. Some special product and big order will be newly produced according to your order.

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Contact Us

  • Room 2222, 22nd Floor, Building 1, Wanxiang Times Garden, No. 676, Renmin East Road, Furong District, Changsha City, Hunan Province, China
  • Phone : 0086 186-848-89358
  • Whatsapp : +8615274981317
  • Email : info@nooaelectric.com
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