Address
Nanzhai village, Liushi Town, yueqingCity, zhejiang Province, china
Tel
+86-13375775325
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Introduction:
The 33kV Suspension Silicone Insulator is a high-performance insulating device designed for use in overhead power transmission and distribution systems. It features a composite structure consisting of a fiberglass reinforced polymer (FRP) rod, silicone rubber housing, and metal end fittings. This composite tension insulator is engineered to provide reliable electrical insulation, mechanical support, and environmental resistance, especially in contaminated or harsh atmospheric conditions. With its 9-shed alternating "big-small" shed design, ball-and-socket connection hardware, mechanical load rating of 70kN, and creepage distance of 1180mm, it ensures safe and stable operation in 33kV electrical networks.
Drawings:
Specifications:
Product Type | Dimensions | Mechanical | Electrical | ||||||||
Height | Mini Dry | Mini | Diameter | Number of | Diameter | Specified | Routine | Rated Voltage | Lightning | Power | |
FXBW-33-70 | 605 ±10 | 450 | 1180 | 18 | 9 | 130/100 | 70 | 35 | 33 | 230 | 95 |
Order Information: | |||||||||||
Product Parts Display:
① End Fitting type: Ball
Forged steel and hot dip galvanized,minimum thinkness of the galvanization:86µm
② The thickness of silicone rubber housing is more than 3mm,it is in accordance with IEC standard.
③ The acid-resistance,high terperature-resistance core rod use the materials epoxy & glassfiber.
④ End fitting type: Socket
Forged steel and hot dip galvanized, minimum thinkness of the galvanization:86µm
Key Features:
This transmission line insulator includes a lot of features as followings
High Mechanical Strength: Designed to withstand a mechanical load of 70kN, providing durability and reliability under mechanical stress and dynamic loads.
Optimized Creepage Distance: A long creepage distance of 1180mm enhances pollution performance, reducing the risk of flashover in contaminated or humid environments.
Advanced Shed Design: The 9-shed alternating “big-small” configuration improves hydrophobicity, promotes water runoff, and prevents the formation of continuous conductive paths.
Superior Material Composition:
Core: High-strength fiberglass rod for excellent mechanical tensile strength.
Housing and Sheds: High-temperature vulcanized (HTV) silicone rubber with outstanding hydrophobicity, UV resistance, and tracking/erosion resistance.
End Fittings: Forged or machined metal ball-and-socket fittings with corrosion-resistant coating for secure and flexible connections.
Lightweight and Durable: Much lighter than traditional porcelain or glass insulators, reducing load on supporting structures while maintaining long-term performance.
Excellent Electrical Performance: Low partial discharge, high dielectric strength, and resistance to aging under electrical stress.
Production Process:
Material Preparation: Inspection and preparation of raw materials, including fiberglass rods, silicone rubber compounds, and metal end fittings (ball and socket type).
Rod Treatment: The fiberglass rod is cleaned, sanded, and treated with coupling agents to ensure strong adhesion to the rubber.
Molding and Vulcanization:
The fiberglass rod is placed in an injection mold corresponding to the 9-shed "big-small" design.
Liquid silicone rubber is injected under high pressure and temperature to form the housing and sheds.
The assembly is cured in a vulcanization oven to cross-link the rubber, ensuring a seamless, void-free interface between the rod, rubber, and end fittings.
Fitting Assembly: The metal ball and socket fittings are attached to both ends of the rod using compression, swaging, or adhesive bonding techniques.
Quality Control and Testing:
Mechanical load testing (up to 70kN) to verify tensile strength.
Electrical tests, including power frequency withstand voltage, lightning impulse withstand voltage, and partial discharge measurement.
Hydrophobicity tests and pollution performance evaluation.
Dimensional and visual inspection to ensure compliance with design specifications.
Application Scenarios:
This high voltage composite insulator can be applied to many scenarios.
Overhead Transmission and Distribution Lines: Widely used in 33kV power lines, especially in coastal, industrial, or heavily polluted areas where salt, dust, or chemical contaminants are present.
Substation Applications: Suitable for insulating busbars, disconnect switches, and other substation equipment requiring reliable insulation under high mechanical and electrical stress.
Renewable Energy Integration: Used in grid connections for wind and solar farms, where environmental durability and low maintenance are critical.
Railway Electrification: Applied in 33kV overhead catenary systems for railways, offering vibration resistance and long-term reliability.
Retrofitting and Upgrading: An ideal replacement for aging porcelain or glass insulators in existing networks, providing enhanced performance with reduced weight and improved contamination resistance.
Advantages in Service:
Maintains Hydrophobicity: The silicone rubber surface retains water-repellent properties even after prolonged exposure to moisture, minimizing leakage current.
Corrosion and UV Resistant: Withstands harsh environmental conditions, including salt fog, acid rain, and intense sunlight.
Easy Installation: The ball-and-socket connection allows for flexible alignment and quick installation, reducing labor time and cost.
Long Service Life: Designed for a service life of 30+ years with minimal maintenance, offering a cost-effective solution for utilities and grid operators.
Two Ends Of Connecting Hardware List
| Attachedto the letter | WQ | WD | WU | CT | TT | UU | YQ | RR | |
| On behalfof fittings | Socket -Ball | Socket -Tongue | Socket- Clevis | Ball- Bal | Clevis-Tongue | Tongue-Tongue | Clevis- Clevis | Y-Ball | Ring-Ring |
| Connectionmark | 16-16 | 16-7 | 16-7 | 16-16 | 7-7 | 7-7 | 7-7 | 7-7 | 7-7 |
1. According to the requirements of hardware in models are indicated in the attached letter;
2. According to the requirements of users can formulate and match ends fitting;
3. Silicone rubber color gray as the default,can also choose the other colors.
4. Custom made according to customer's drawings
 |  |
 |  |
 |  |  |
Introduction:
The 33kV Suspension Silicone Insulator is a high-performance insulating device designed for use in overhead power transmission and distribution systems. It features a composite structure consisting of a fiberglass reinforced polymer (FRP) rod, silicone rubber housing, and metal end fittings. This composite tension insulator is engineered to provide reliable electrical insulation, mechanical support, and environmental resistance, especially in contaminated or harsh atmospheric conditions. With its 9-shed alternating "big-small" shed design, ball-and-socket connection hardware, mechanical load rating of 70kN, and creepage distance of 1180mm, it ensures safe and stable operation in 33kV electrical networks.
Drawings:
Specifications:
Product Type | Dimensions | Mechanical | Electrical | ||||||||
Height | Mini Dry | Mini | Diameter | Number of | Diameter | Specified | Routine | Rated Voltage | Lightning | Power | |
FXBW-33-70 | 605 ±10 | 450 | 1180 | 18 | 9 | 130/100 | 70 | 35 | 33 | 230 | 95 |
Order Information: | |||||||||||
Product Parts Display:
① End Fitting type: Ball
Forged steel and hot dip galvanized,minimum thinkness of the galvanization:86µm
② The thickness of silicone rubber housing is more than 3mm,it is in accordance with IEC standard.
③ The acid-resistance,high terperature-resistance core rod use the materials epoxy & glassfiber.
④ End fitting type: Socket
Forged steel and hot dip galvanized, minimum thinkness of the galvanization:86µm
Key Features:
This transmission line insulator includes a lot of features as followings
High Mechanical Strength: Designed to withstand a mechanical load of 70kN, providing durability and reliability under mechanical stress and dynamic loads.
Optimized Creepage Distance: A long creepage distance of 1180mm enhances pollution performance, reducing the risk of flashover in contaminated or humid environments.
Advanced Shed Design: The 9-shed alternating “big-small” configuration improves hydrophobicity, promotes water runoff, and prevents the formation of continuous conductive paths.
Superior Material Composition:
Core: High-strength fiberglass rod for excellent mechanical tensile strength.
Housing and Sheds: High-temperature vulcanized (HTV) silicone rubber with outstanding hydrophobicity, UV resistance, and tracking/erosion resistance.
End Fittings: Forged or machined metal ball-and-socket fittings with corrosion-resistant coating for secure and flexible connections.
Lightweight and Durable: Much lighter than traditional porcelain or glass insulators, reducing load on supporting structures while maintaining long-term performance.
Excellent Electrical Performance: Low partial discharge, high dielectric strength, and resistance to aging under electrical stress.
Production Process:
Material Preparation: Inspection and preparation of raw materials, including fiberglass rods, silicone rubber compounds, and metal end fittings (ball and socket type).
Rod Treatment: The fiberglass rod is cleaned, sanded, and treated with coupling agents to ensure strong adhesion to the rubber.
Molding and Vulcanization:
The fiberglass rod is placed in an injection mold corresponding to the 9-shed "big-small" design.
Liquid silicone rubber is injected under high pressure and temperature to form the housing and sheds.
The assembly is cured in a vulcanization oven to cross-link the rubber, ensuring a seamless, void-free interface between the rod, rubber, and end fittings.
Fitting Assembly: The metal ball and socket fittings are attached to both ends of the rod using compression, swaging, or adhesive bonding techniques.
Quality Control and Testing:
Mechanical load testing (up to 70kN) to verify tensile strength.
Electrical tests, including power frequency withstand voltage, lightning impulse withstand voltage, and partial discharge measurement.
Hydrophobicity tests and pollution performance evaluation.
Dimensional and visual inspection to ensure compliance with design specifications.
Application Scenarios:
This high voltage composite insulator can be applied to many scenarios.
Overhead Transmission and Distribution Lines: Widely used in 33kV power lines, especially in coastal, industrial, or heavily polluted areas where salt, dust, or chemical contaminants are present.
Substation Applications: Suitable for insulating busbars, disconnect switches, and other substation equipment requiring reliable insulation under high mechanical and electrical stress.
Renewable Energy Integration: Used in grid connections for wind and solar farms, where environmental durability and low maintenance are critical.
Railway Electrification: Applied in 33kV overhead catenary systems for railways, offering vibration resistance and long-term reliability.
Retrofitting and Upgrading: An ideal replacement for aging porcelain or glass insulators in existing networks, providing enhanced performance with reduced weight and improved contamination resistance.
Advantages in Service:
Maintains Hydrophobicity: The silicone rubber surface retains water-repellent properties even after prolonged exposure to moisture, minimizing leakage current.
Corrosion and UV Resistant: Withstands harsh environmental conditions, including salt fog, acid rain, and intense sunlight.
Easy Installation: The ball-and-socket connection allows for flexible alignment and quick installation, reducing labor time and cost.
Long Service Life: Designed for a service life of 30+ years with minimal maintenance, offering a cost-effective solution for utilities and grid operators.
Two Ends Of Connecting Hardware List
| Attachedto the letter | WQ | WD | WU | CT | TT | UU | YQ | RR | |
| On behalfof fittings | Socket -Ball | Socket -Tongue | Socket- Clevis | Ball- Bal | Clevis-Tongue | Tongue-Tongue | Clevis- Clevis | Y-Ball | Ring-Ring |
| Connectionmark | 16-16 | 16-7 | 16-7 | 16-16 | 7-7 | 7-7 | 7-7 | 7-7 | 7-7 |
1. According to the requirements of hardware in models are indicated in the attached letter;
2. According to the requirements of users can formulate and match ends fitting;
3. Silicone rubber color gray as the default,can also choose the other colors.
4. Custom made according to customer's drawings
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