Suspension Insulator
Suspension Insulator
Suspension Insulator
Suspension Insulator
Suspension Insulator

Suspension Insulator

A Suspension Insulator is a disc-shaped insulator unit suspended from transmission tower cross-arms to support and electrically isolate conductors. Multiple insulator discs are connected in series to form an insulator string, allowing the insulation level to be adjusted according to system voltage requirements. Our suspension insulators are widely used in overhead power lines ranging from 11kV to 1000kV AC and HVDC transmission projects worldwide with IEC standard. Suitable for:

👉Coastal Areas

👉Desert Regions

👉Industrial Pollution Zones

👉Tropical Climates

👉High Altitude Transmission Lines

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Toughened Glass Suspension Insulators for Transmission & Distribution Lines

Nooa Electric supplies Toughened glass suspension insulators for transmission and distribution lines. IEC certified suspension insulator manufacturer supplying EPC projects, utilities, and distributors worldwide.


Our Suspension Insulators are designed for high-voltage transmission and distribution systems, providing excellent mechanical strength, superior electrical performance, and long-term operational reliability. Manufactured from high-quality toughened glass, our suspension insulators are widely used in overhead power lines ranging from 11kV to 1000kV AC and HVDC transmission projects worldwide.


basic type minimum mechanical failing load(kn) nominal diameter d(mm) nominal spacing p(mm) nominal creepage distance (mm) standard coupling wet power frequency withstand voltage (kv) dry lightning impulse withstand voltage (kv) power frequency puncture voltage (kv) radio interference voltage (μ v) 10kv 1mhz corona visual test p/c kv power frequency electric arc voltage impulse puncture voltage (p.u) net weight (kg)

u40b

40 178 110 190 11 25 50 90 50 18/22 0.12s/20ka 2.8 2.1
u70bs 70 255 127 320 16 40 100 130 50 18/22 0.12s/20ka 2.8 3.5
u70bl 70 255 146 320 16 40 100 130 50 18/22 0.12s/20ka 2.8 3.6
u100bs 100 255 146 320 16 40 100 130 50 18/22 0.12s/20ka 2.8 4
u120b 120 255 146 400 16 40 100 130 50 18/22 0.12s/20ka 2.8 4
u160bs 160 280 146 400 20 45 110 130 50 18/22 0.12s/20ka 2.8 6.5
u160bm 160 280 155 400 20 45 110 130 50 18/22 0.12s/20ka 2.8 6.6
u160bl 160 280 170 400 20 45 110 130 50 18/22 0.12s/20ka 2.8 6.7
u210b 210 280 170 400 20 45 110 130 50 18/22 0.12s/20ka 2.8 7.2
u240b 240 280 170 400 20/24 45 110 130 50 18/22 0.12s/20ka 2.8 7.2
u300b 300 320 195 485 24 50 130 130 50 18/22 0.12s/20ka 2.8 10.6
u420b 420 360 205 550 28 80 140 140 50 18/22 0.12s/20ka 2.8 16
u550b 550 380 240 600 32 55 140 140 50 18/22 0.12s/20ka 2.8 21.5

CTV254

(PS70E)

70
 255
 127
 320
 16
 40
 100
 130
 130
 18/22
 0.12s/20ka
 2.8
 3.5
CTV175
 40
 178 110 190 11 25 50 90 50 18/22 0.12s/s20ka 2.8 2.1

note:
1. the product model is in accordance with gb/t 7253-2005 and jb/t 9683-2012 (iec60305:1995, mod). the 420kn strength grade product contains 400kn strength grade, and the 550kn strength grade product contains 530kn strength grade.

2. the connection structure is in accordance with gb/t 4056-2008 (iec60120: 1984, mod) and bs 3288 part

3. according to the customer's request, the locking pin can be w-pin or r-pin. unless otherwise specified, u70~u120 adopts w pin, and other uses r pin.

4. black marks are hot sellers-your best Glass insulators choice for overhead power lines


What Is a Suspension Insulator?

A Suspension Insulator is a disc-shaped insulator unit suspended from transmission tower cross-arms to support and electrically isolate conductors. Multiple insulator discs are connected in series to form an insulator string, allowing the insulation level to be adjusted according to system voltage requirements.

Main Applications
High Voltage Transmission Lines
Extra High Voltage (EHV) Networks
Ultra High Voltage (UHV) Projects
Distribution Power Lines
Railway Electrification Systems

Substation Busbar Support Systems

suspension insulators projects

Why Choose Toughened Glass Suspension Insulators?

1. Self-Shattering Feature for Easy Inspection

Unlike porcelain insulators, toughened glass suspension insulators automatically shatter when internal defects occur while maintaining mechanical connection. This allows maintenance teams to quickly identify failed units through visual inspection.

Benefits

✓ Easy fault detection

✓ Reduced maintenance costs

✓ Improved line reliability

✓ Faster replacement planning

2. Excellent Mechanical Strength

Our suspension insulators are designed to withstand extreme mechanical loads caused by:

Conductor tension
Wind loads
Ice accumulation
Seismic activities
Long-span transmission crossings

Available mechanical ratings include:

IEC Type -Mechanical Load
U70B -70 kN
U100B -100 kN
U120B -120 kN
U160B -160 kN
U210B -210 kN
U240B -240 kN
U300B -300 kN
U420B -420 kN
U550B -550 kN

3. Superior Electrical Performance


The high dielectric strength of tempered glass provides stable insulation performance even under severe environmental conditions.

Features include:

High Power Frequency Withstand Voltage
Excellent Lightning Impulse Performance
Low Radio Interference Voltage (RIV)
Strong Pollution Resistance
Long Creepage Distance Options

Suitable for:

Coastal Areas
Desert Regions
Industrial Pollution Zones
Tropical Climates
High Altitude Transmission Lines

FAQ for Suspension Insulator

1.What mechanical ratings are available?

Common ratings include 70kN, 100kN, 120kN, 160kN, 210kN, 240kN, 300kN, 420kN, and 550kN.


2.Can you supply insulators according to IEC standards?

Yes. We manufacture suspension insulators in compliance with IEC, ANSI, GB, and other international standards.


3.What fitting connections are available for suspension insulators?

Glass suspension insulators can be supplied with different fitting types depending on utility requirements and transmission line designs, including:

Ball and Socket Connection
Clevis and Tongue Connection
Socket and Clevis Connection
Double Ball Connection
Special OEM Designs

Ball-and-socket fittings compliant with IEC standards are the most widely used configuration for transmission lines worldwide.

4. What documents should EPC contractors request before purchasing suspension insulators?
For international tenders and EPC projects, buyers should request:

Technical Datasheets
IEC Type Test Reports
Routine Test Reports
Mechanical Failing Load Test Reports
Galvanization Test Reports
Factory Quality Certificates
ISO 9001 Certification
Third-Party Inspection Reports (SGS, BV, TÜV, etc.)
Manufacturing Process Documentation
Project Reference Lists

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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