Home > Products > Electrical Polymer Insulator > Polymer Suspension Insulator > 110kV Polymer Suspension Insulators
Product Description
Suspension insulators are a type of electrical insulator used to support overhead power transmission lines. They are typically made of porcelain or glass and consist of a series of disc-shaped insulators connected together by a metal or fiberglass rod. The disc-shaped insulators are designed to withstand high voltages and provide insulation between the transmission line and the tower or pole.
Suspension insulators are used in high voltage power transmission lines to provide support and insulation. They are suspended from the tower or pole by a steel cable, and the transmission line is attached to the bottom of the insulator. The insulator provides a barrier between the high voltage electricity in the transmission line and the tower or pole, preventing the electricity from flowing through the tower or pole and into the ground.
Suspension insulators are designed to withstand a variety of environmental conditions, including rain, wind, and temperature changes. They are also designed to withstand the mechanical stress caused by the weight of the transmission line and the wind load. Suspension insulators are typically designed with a safety factor to ensure that they can withstand the maximum mechanical and electrical loads that may be encountered.
Definition: Suspension insulators protect overhead transmission lines like a conductor. They are generally made of ceramic material and consist of a single or a string of insulating discs suspended from a tower. It operates above 33KV and overcomes the limitations of the following pin insulators.
High voltage resistance: Suspension insulators are designed to withstand high voltages, making them ideal for use in high voltage power transmission lines.
Effective insulation: Suspension insulators provide effective insulation between the transmission line and the tower or pole, preventing electrical current from flowing through the tower or pole and into the ground.
Durable: Suspension insulators are typically made of durable materials such as porcelain or glass, which can withstand a variety of environmental conditions, including rain, wind, and temperature changes.
Low maintenance: Suspension insulators require very little maintenance once they are installed. This makes them a cost-effective option for power transmission lines.
Safe: Suspension insulators provide a high degree of safety by preventing electrical current from flowing through the tower or pole and into the ground. This helps to protect people and equipment from the dangers of electrical shoc
Suspension insulators are electrical insulators used to support high voltage power transmission lines. They are commonly used in areas where the voltage of the transmission line exceeds 33 kV. Suspension insulators are designed to withstand the high mechanical and electrical stresses associated with high voltage transmission lines.
Construction:
The suspension insulator consists of the following parts:
Insulator body: It is the main part of the suspension insulator and is made of porcelain or composite materials. The porcelain insulators are made of high-quality clay, quartz, and feldspar, while the composite insulators are made of silicone rubber and fiberglass.
Metal fittings: The metal fittings are used to attach the insulator body to the transmission line. The fittings are made of aluminum, steel, or other metals that can withstand the mechanical stress of the transmission line.
Working:
The suspension insulator works by providing an electrical barrier between the high voltage power transmission line and the support structure. When the transmission line is energized, it creates an electric field around the conductor. This electric field can cause current to flow through the air or along the surface of the insulator, which can lead to power loss and equipment damage.
The suspension insulator provides an electrical barrier that prevents the current from flowing through the air or along the surface of the insulator. The insulator body is made of a material that has a high dielectric strength, which means it can withstand high voltage without breaking down. The metal fittings are designed to hold the insulator body in place and prevent it from being damaged due to the mechanical stress of the transmission line.
Power Transmission Lines: Suspension insulators are commonly used to support and insulate the conductors of high-voltage transmission lines. These lines carry electricity over long distances, often spanning across towers and structures. Suspension insulators provide the necessary electrical isolation and mechanical support to ensure efficient power transmission.
Distribution Lines: Suspension insulators are also used in distribution systems, which deliver electricity to homes, businesses, and other end-users. These systems operate at lower voltage levels compared to transmission lines but still require effective insulation to maintain electrical safety and reliability.
Substations: Suspension insulators may be employed in substations, which serve as intermediate points between transmission and distribution systems. They help insulate the conductors and equipment within substations, ensuring proper functioning and minimizing the risk of electrical faults.
Crossings and Transitions: Suspension insulators are used in situations where power lines cross roads, railways, or other obstacles. They provide insulation and support at these crossing points, allowing the power lines to continue uninterrupted while maintaining safety and preventing electrical interference.
Overhead Rail Electrification: In railway systems with overhead electrification, suspension insulators are utilized to support the power lines that supply electricity to trains. They provide electrical isolation and mechanical strength to ensure reliable train operations.
They should have a high mechanical strength
The dielectric strength of the material should be able to withstand high voltage stresses
The electrical insulation resistance should be high
The material should be free from impurities, cracks and porosity
The physical and electrical properties of the insulator should not be affected by environmental changes
A safety factor must be considered.
It consists of two main parts, which are the cross arm and the insulator with several metal links (also known as a disc insulator). A suspension insulator or suspension string is formed by connecting a number of insulators in series with the aid of metal links, where the conductor is suspended by the bottommost insulator and the top of the insulator is held in place by the cross arm. These insulators are mainly used in overhead lines.
Parameter:
>System voltage: 110kV, 132kV, 138kV
Strength: 70kN, 80kN, 100kN, 120kN, 160kN, 210kN, 300kN
Color: grey, red, white or customerised
Standard: IEC standard, ANSI standard, BS standard
Creepage distance: 21mm/kV, 25mm/kV, 27mm/kV, 33mm/kV, 40mm/kV
Design according requirement
Specification:
Rated
System Voltage
(kV) |
Type |
Section Length
(mm)
|
Arcing Distance
(mm) |
Creepage Distance
(mm) |
Coupling Size
|
Specified
Mechanical
Load
(kN) |
Lightning Impulse
Withstand Voltage
(kV) |
Power Frequency
Withstand Voltage
(kV) |
|
Dry
|
We
|
||||||||
110 | FXBW-110/70 | 1240 | 1220 | 3520 | 16 | 70 | 550 | 285 | 230 |
110 | FXBW-110/120 | 1240 | 1220 | 3520 | 16 | 120 | 550 | 285 | 230 |
110 | FXBW-110/160 | 1340 | 1180 | 3520 | 20 | 160 | 550 | 285 | 230 |
Order Information: 1.Pollution level; 2.Voltage grade; 3.Mechanical load; 4.Insulation distance; 5.Creepage distance; 6.Section length; 7.Coupling type Ps. Different design could be supplied as customer requirements |
① Shed connected with core by integral forming
② Metal end fittings, core and sheds connected by new crimping process
③ The thickness of housing > 3mm, uniform thickness, confirm to IEC Standard
④ Acid resistant, high temperature resistant of epoxy fiberglass core
⑤ The material of metal end fittings is used with hot galvanization and technology of rare earth aluminum
coating to avoid coating shedding when crimping, prolonging the service life of the product
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