120kN aerodynamic GLASS INSULATOR toughened glass insulators U120BP/127M

Product Introduction

120kN Open-profile / aerodynamic toughened glass insulators are specially designed for overhead power lines, perfectly adapted to dense urban areas and space-constrained working conditions. Balancing excellent electrical performance and practical structure, they are the ideal choice for high-demand power transmission scenarios.

The open-profile design breaks through the traditional pollution accumulation limitation, enabling easier and more efficient cleaning and maintenance. While ensuring reliable operation of power lines, it significantly reduces daily operation and maintenance costs, cuts labor and equipment investment, and is suitable for high-frequency inspection requirements.

With outstanding electrical and mechanical strength, they can easily handle complex working conditions such as heavy industrial loads, coastal salt spray, and desert drought. Whether for dense laying in urban areas or harsh environments in remote regions, they deliver stable performance and achieve full working condition compatibility.

For extreme scenarios such as deserts, arid areas, and high-dust environments, we adopt an exclusive under-rib-free (smooth under-umbrella) design. This structure completely prevents the accumulation of solid pollutants such as dust and sand on the lower surface of the insulator, and realizes automatic self-cleaning by natural wind, fundamentally blocking the path of sand pollution flashover, ensuring continuous and stable operation in harsh wind and sand environments without compromising insulation performance.

In 2025, Jiangxi Huayao Electric Co., Ltd. exported 875,000 pieces of open-profile glass insulators to Algeria, which were specially applied to the power transmission project in the Sahara Desert region. At present, this batch of products is in good operating condition. Verified by long-term monitoring, their insulation performance and mechanical stability meet the standards, fully confirming the excellent quality and environmental adaptability of the products.

Jiangxi Huayao Electric Co., Ltd. takes professional technology as the core and continues to deepen its focus in the power insulation field. With excellent performance and perfect adaptability, open-profile glass insulators have become the preferred solution for power engineering projects at home and abroad, and can meet the power transmission and stable operation needs of different regions and various working conditions.

Product Parameters

120kN open air profile disc suspension glass insulator U120BP/127M

Dimensions
Diameter (D): 380mm
Spacing (H): 127mm
Creepage Distance: 350mm
Coupling Size: 16mm

Mechanical Values
Mechanical Failing Load: 120kN
Tension Proof: 60kN

Electrical Values
Dry Power-frequency Withstand Voltage: 60kV
Wet Power-frequency Withstand Voltage: 50kV
Dry Lightning Impulse Withstand Voltage: 90kV
Puncture Withstand Voltage: 130kV

Radio Influence Voltage Data
Test Voltage RMS to Ground: 10kV
Maximum RIV at 1000 kHz: 50μV

Packing and Shipping Data

Main types of glass insulator

Glass insulator is including standard type, pollution resistant type, DC type, spherical type, aerodynamic type, ground wire type, and contact network for electrified railways

Jiangxi Huayao electric Co.,ltd produce standard type glass insulator 40-550Kn, Pollution resistant type 70-400Kn, mutil-umbrella type 120-330kN, Glass insulator aerodynamic type 120-300kN, ground wire type.

Good anti-pollution flashover performance of aerodynamic Insulator

The skirt structure of the aerodynamic insulator can effectively reduce the deposition of filth. The distance between the umbrella skirt and shape design makes it difficult for dust, salt spray and other filthy substances to accumulate on the surface of the insulator. For example, in industrial pollution areas or coastal salt spray environment, traditional insulators may lead to a decline in insulation performance due to the accumulation of filth, but aerodynamic insulators can take advantage of their structural advantages to make filth more easily washed away under natural conditions such as wind and rain.

As a core supplier for power grid projects, Jiangxi Huayao Electric has successfully won bids for a number of key projects of China Southern Power Grid and State Grid Corporation of China.Our products are widely used in core domestic power grid construction projects and have been highly recognized by authoritative power grid systems for their stable quality.

Overseas Key Projects

In 2025, the company successfully won the bid for the glass insulator project of SONELGAZ-TOS SPA in Algeria, with a contract value of up to 11 million US dollars, marking that Huayao Electric products have officially entered the overseas high-end power engineering supply chain.At the same time, our products are stably supplied to key power engineering projects of Electricity of Vietnam all year round. Our overseas market reputation and supply capacity continue to lead the industry.

Warehouse of Huayao workshop

Huayao product has been awarded 1. Xi'an High Voltage Apparatus Research Institute Co., Ltd

2. National Ceramic Product Quality Inspection and Testing Center Jiangxi Ceramic Testing Center

The inspection report of the institution.

All products undergo full acceptance by international authoritative third-party organizations, and can provide testing and certification services from Intertek, SGS, BV and other institutions. We strictly follow international standards to control product quality, provide traceable and verifiable quality assurance for global customers, and meet the comprehensive requirements of overseas project bidding and compliance review.

Standard of glass insulator:

The tests have been performed in accordance with:
GB/T1001.1-2021 Insulators for overhead lines with a norminal voltage above 1000V Part1: Ceramic or glass insulator units for a.c. systems Definitions, test methods and acceptance criteria (IEC 60383-1:2021 MOD)
GB/7253-2019 Insulator for overhead lines with a nominal voltage above 1000V-Ceramic or glass insulator units for a.c. systems-Characteristics of insulator units of cap and pin type (IEC 60305:2021 MOD)
IEC 60383-1:2023 Insulators for overhead lines with a norminal voltage above 1000V
IEC 60120:2020 Dimensions of ball and socket couplings of string insulator units
Jiangxi Huayao electric Co.,ltd strictly compliance with above standard. We do the factory test report as above standard.
We always do following test for each products:
1. Verification of the Dimensions
2. Verifications of Displacements
3. Locking system test
4. Galvanized test
5. Thermal shock test
6. Mechanical Failing Load Test
7.Power frequency puncture withstand test

JIANGXI HUAYAO ELECTRIC CO.,LTD attend the exhibition in VIETNAM ETE & ENERTEC EXPO，ELECTRICITY ALGERIA EXPO，IRAQ Energy Expo conference for electricity, oil, gas， Asia (Thailand) Electricity, Transmission and Distribution, and Energy Exhibition etc.