66kv glass insulator IEC standard China factory

Product Parameters

Dimensions
Diameter (D): 255mm
Spacing (H): 146mm
Creepage Distance: 320mm
Coupling Size: 16mm

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

Electrical Values
Dry Power-frequency Withstand Voltage: 70kV
Wet Power-frequency Withstand Voltage: 40kV
Dry Lightning Impulse Withstand Voltage: 100kV
Puncture Withstand Voltage: 130kV

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

Packing and Shipping Data
Net Weight, Approximate: 3.6kg

Our Product Series

• • Toughened glass insulators (also known as high-voltage glass insulators, power line glass insulators, and suspension glass insulators) are indispensable core insulation components in high-voltage power transmission, distribution and telecommunication systems.Their core functions are to mechanically support conductors and provide electrical insulation and isolation, ensuring the safe and stable operation of power lines.Made of high-strength toughened glass, the products feature excellent high insulation resistance, which can effectively isolate live conductors from support structures such as transmission towers and fittings, completely eliminating safety accidents such as current leakage, arc discharge and short circuits.They are key equipment ensuring the integrity and safety of power grids.

    Jiangxi Huayao Electric Co., Ltd. specializes in the production of a full range of toughened glass insulators covering standard, anti-pollution, heavy pollution and fog-type working conditions, with complete models and stable performance.

    Our glass insulators are manufactured in strict accordance with the domestic standard GB/T 1001.1 and the international standard IEC 60305, covering the full voltage range from 10kV to 1000kV, suitable for conventional power transmission, UHV transmission, coastal high-pollution and other scenarios.

    Our Product Series
    • Standard Type: U70B, U100B, U120B, etc. (B = Standard)
    • General Anti-pollution Type: U70BP, U100BP, U120BP, etc. (P = Pollution)
    • Heavy Pollution / Long Profile Type: U70BLP, U100BLP, etc. (LP = Long Profile)
    • Fog Type: U70BP/146M, U70BLP/146M

Jiangxi Huayao Electric Co., Ltd. provides the following selection suggestions for you:

• General areas, light pollution: Standard type (U70B, U100B, U120B, etc. (B = Standard))
• Industrial zones, coastal salt spray (heavy pollution): Anti-pollution type (U70BLP, U100BLP)
• Foggy, humid and dewy conditions: Fog type (U70BP/146M, U70BLP/146M)

Friends from all sectors are welcome to contact us by phone at 86-15870077965 or by email at admin@huayaoelectric.com.Huayao Electric will provide you with professional technical support and one-on-one product selection solutions.

Application scenarios

Jiangxi Huayao Electric Co., Ltd. glass insulators are applied in the following scenarios:

Standard Power Grid Application

Huayao Electric glass insulators are specially designed for transmission and distribution networks in moderately polluted environments. They exhibit excellent insulation performance and high mechanical stability under conventional climates, mild salt spray and dust pollution conditions, fundamentally ensuring the safe and stable operation of the power grid throughout its full life cycle, and are perfectly suitable for power grid operation requirements in different regions of northern and southern China.

Electrical Equipment Supporting Application

Our products are widely compatible with various electrical devices such as switchgear and electrical control cabinets, accurately meeting the core engineering requirements of internal insulation isolation and fixed support, providing reliable dual guarantees of insulation and structural support for the safe operation of electrical equipment.

Domestic Benchmark Projects

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.