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220kv Suspension Composite Insulator Silicon Rubber Electrical Insulator
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Application
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Used for outdoor substation, distribution device as well as electrical equipments.
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System Voltage
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10kV -750kV silicone rubber insulator
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Specified Cantilever Load (SCL)
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2-20 kN
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Color
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Brown, Gray, or Customer's requirement
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Applicable Standard
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IEC, ANSI, or Customer requirement
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Applicable Condition
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Environment temperature from -50ºC to +50ºC, Altitude from 0 ~ 4000 meters above sea level, and medium & heavy pollution area, Especially for heavy earthquake areas. |
Materials of High Voltage composite silicone rubber post type insulator
1).Silicon Rubber for sheds/housing.
2).Glass-fiber reinforced epoxy resin rod (ECR type) for core.
3).Hot dip galvanized cast steel for metal fittings.
4).5000hours aging test from STRI Sweden & Prototype Test & Type Test & Factory Test ( Routine and Sampling Test ).
5).IEC / ANSI / GB standard.
1-We produce epoxy resin fiberglass rod.
2-We produce HTV silicone rubber.
3-We produce HDG metal fittings.
4-Famous and top brand in China.
5-Superior quality and competitive price.
6-Almost 20 years experience with insulators, surge arresters and fuse cutouts.
7-Exported to more than 35 countries.
8-Guarantee: we can give 15 years wanrantee period after shipment.
9-ISO9001 and ISO14001 and third party support and assurance from Envertec-Europe.
The Polymer Insulator are made of glassfiber epoxy core rod, silicone rubber shed and metal fittings.
The silicon rubber shed adopt the whole packing pressure technique, and then to solve the key problem - interface electric spark puncture, which would affect the reliability of composite insulator.
Connection of the glassfiber rod and metal fittings, adopts the pressure welding technique of the international advanced level, and have the full automatic sound wave detection of defects system, high intension, beautiful outline, small volume, light weight, and the metal fitting of galvanization can corrosion prevention and exchange used with porcelain insulator.
This product is reliable structure, can't damage the core rod, and take full advantage of the mechanical strength.
The dimension can be customized as per client's requirement.
| Key Specifications | FPC-28 | FPC-36 |
| Rating Voltage: | 28KV | 36KV |
| Specialized mechanical tension load: | 8KN | 8KN |
| Structure height: | 375mm | 418mm |
| Min Arc Distance: | 220mm | 260mm |
| Min creepage distance: | 820mm | 980mm |
| Lightning impulse voltage: | 200KV | 220KV |
| Power frequency wet withstand voltage: | 92KV | 112KV |
1. What is an Electrical Insulator?
An electrical insulator is a material that resists the flow of electrical current and is used to separate electrical conductors, prevent accidental contact, and protect people and equipment from electrical hazards. Insulators are commonly used in power transmission and distribution systems to support and insulate conductors and electrical components.
2. What are the types of Electrical Insulators?
There are several types of electrical insulators, each designed for specific applications:
Pin Insulators: Used to mount on power poles, pin insulators hold the conductor in place and prevent electrical leakage to the ground.
Suspension Insulators: Typically used in high-voltage transmission lines, these insulators are suspended from towers and support the weight of the conductors.
Shackle Insulators: Compact insulators used in low-voltage systems, often used to secure conductors in substations or distribution lines.
Post Insulators: Typically used in substations, these insulators have a vertical configuration and are used to support heavy electrical equipment.
Strain Insulators: These insulators are used where the conductor is under mechanical stress, such as at the ends of transmission lines or in areas where the line is subjected to strong tension.
Line Post Insulators: Similar to post insulators, but designed for use in overhead line applications to support conductors.
Bushing Insulators: Used in transformers, circuit breakers, and other electrical devices to insulate and support conductors passing through metal casings.
3. What materials are Electrical Insulators made from?
Electrical insulators are made from various materials, depending on the application and environmental conditions. Common materials include:
Porcelain: A traditional and widely used material, offering excellent mechanical strength, electrical resistance, and durability, particularly in high-voltage applications.
Glass: Offers high dielectric strength and is resistant to environmental factors like UV light and corrosion. Glass insulators are often used for outdoor applications.
Polymer/Composite Materials: Modern materials like silicone rubber, EPDM (ethylene propylene diene monomer), or polymer composites are used to make lightweight, durable, and corrosion-resistant insulators. These are often used in areas with high humidity or pollution.
Ceramic: Used in both low- and high-voltage applications, ceramic insulators are durable and provide reliable electrical insulation.
4. What is the role of an Electrical Insulator in power transmission?
In power transmission systems, electrical insulators serve several critical functions:
Support conductors: Insulators hold electrical conductors (wires) in place, preventing them from touching supporting structures (such as transmission poles) or the ground.
Prevent leakage: Insulators prevent electrical current from leaking into the environment, which could result in electrical losses or hazards.
Safety: They provide safety by isolating high-voltage conductors from the surrounding environment, preventing accidental contact and reducing the risk of electrical shock.
Weather and environmental protection: Insulators protect the conductors from external factors like rain, dust, ice, and wind, which could otherwise cause short circuits or power failures.
5. What factors affect the performance of Electrical Insulators?
Several factors can influence the performance of electrical insulators:
Voltage level: Higher voltage systems require insulators with higher dielectric strength to prevent electrical breakdown.
Environmental conditions: Temperature, humidity, pollution, and icing conditions can affect the performance of insulators, particularly those made of porcelain or glass.
Mechanical stress: Insulators must be able to withstand the mechanical stresses exerted by the weight of the conductor, wind pressure, and tension.
Insulator design: The shape and size of the insulator, including features like creepage distance (the distance along the surface of the insulator that electricity must travel), determine its effectiveness in preventing leakage and maintaining insulation integrity.
6. How are Electrical Insulators tested?
Electrical insulators undergo several tests to ensure they perform properly in the field:
Dielectric strength testing: This test measures the insulator's ability to withstand electrical stress without breaking down.
Mechanical strength testing: Determines the insulator's ability to withstand mechanical forces, such as tension or wind pressure.
Creepage distance testing: Measures the path along the insulator's surface that electrical current would have to travel, ensuring it is sufficient to prevent leakage.
Salt-fog testing: Simulates high-pollution environments to test the insulator's resistance to contamination and corrosion.
Temperature cycling: Evaluates the insulator's performance under temperature variations, such as freezing and thawing conditions, to ensure long-term durability.
7. What are the advantages of Polymer Insulators over Porcelain Insulators?
Polymer insulators offer several advantages over traditional porcelain insulators:
Lightweight: Polymer insulators are much lighter, which reduces transportation and installation costs.
Improved performance in polluted areas: They have better resistance to environmental pollution, such as salt, dust, and industrial pollutants, compared to porcelain.
Higher mechanical strength: Polymer insulators can withstand higher mechanical stress and are less likely to break in the event of a storm or mechanical failure.
Corrosion resistance: They are resistant to rust and corrosion, especially in coastal or industrial environments where porcelain may degrade over time.
Easier maintenance: Polymer insulators are easier to clean and maintain due to their smooth surface and resistance to dirt accumulation.
8. How long do Electrical Insulators last?
The lifespan of electrical insulators depends on the material, environmental conditions, and maintenance.
Porcelain and ceramic insulators: Typically last 30-50 years or more with proper maintenance and care.
Polymer insulators: Can also last 25-40 years, but this depends on exposure to UV radiation, pollution, and mechanical stress.
Glass insulators: Can last for several decades, but may be more prone to damage from mechanical stress compared to porcelain or polymer insulators.
9. Are Electrical Insulators recyclable?
Yes, many electrical insulators can be recycled, particularly those made from materials like glass and certain types of polymers. However, the process for recycling insulators depends on the material:
Porcelain and ceramic insulators: Can be crushed and used in construction or road-building materials.
Polymer insulators: Can be processed and reused to create new polymer products or recycled into other materials.
Glass insulators: Can be melted down and repurposed for new glass products.
10. How do I choose the right Electrical Insulator for my application?
When selecting an electrical insulator, consider the following factors:
Voltage level: Ensure the insulator can handle the voltage requirements of your system.
Environmental conditions: Choose materials that are resistant to the local climate, such as humidity, pollution, or extreme temperatures.
Mechanical load: Ensure the insulator can support the weight and tension of the conductor or electrical component.
Regulatory standards: Select insulators that comply with industry standards (e.g., IEC, ANSI, UL) for safety, performance, and reliability.
Maintenance needs: Consider the ease of maintenance and cleaning based on the location of the insulator (e.g., near coastal areas may require more frequent cleaning to prevent corrosion).
11. Can Electrical Insulators be used in outdoor and industrial environments?
Yes, electrical insulators are specifically designed for use in both outdoor and industrial environments. In these settings, insulators must withstand harsh weather conditions, pollution, and mechanical stresses. Polymer insulators, in particular, are well-suited for outdoor use due to their corrosion resistance, while porcelain and ceramic insulators are commonly used in industrial power lines, substations, and other high-voltage applications.
12. How do Electrical Insulators contribute to system safety?
Electrical insulators contribute to safety by:
Preventing accidental contact: They keep conductors isolated and prevent electrical shocks by ensuring that the conductors are not in direct contact with other materials or people.
Reducing short circuits: Insulators help to maintain the integrity of the electrical system, reducing the likelihood of shorts that could cause power outages or fires.
Minimizing wear and tear: Insulators protect cables and conductors from environmental damage, extending the lifespan of the entire electrical system.
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