Insulators are widely used as basic components in medium and high voltage transmission and distribution systems to insulate and support live parts. Composite insulator is a polymer composite insulator supported by epoxy pull rod and insulated by silicone rubber umbrella skirt. The product compared with the traditional ceramic and glass insulation, with light weight (for the same purpose of traditional insulator only 1/4 to 1/8), the intensity is high (dial the great tensile strength and bending strength are high strength porcelain more than 10 times), less impurity cleaning (silicone rubber has a unique strong hydrophobic) significant advantages, and overcome the problem of conventional polymer materials aging life, It can be used safely for decades. It is a new generation of products used in the power system.
Model | Rated | Specified Cantilever Load | Structure | Insulation Distance | Creepage Distance | Lightning Impulse | Power Frequency Withstand Voltage (Wet 1min. ) |
(kV) | （kN） | （mm） | （mm） | （mm） | （kV） | (kV) | |
FS-110/5 | 110 | 5 | 1150±15 | 1042 | 3100 | 550 | 230 |
Model | Rated | Specified Cantilever Load | Structure | Insulation Distance | Creepage Distance | Lightning Impulse | Power Frequency Withstand Voltage (Wet 1min. ) |
(kV) | （kN） | （mm） | （mm） | （mm） | （kV） | (kV) | |
FS-110/10 | 110 | 10 | 1440±20 | 1250 | 3250 | 550 | 230 |
knowledge
Composite insulator production technology is developing rapidly, for the use of the problems that arise in the process, materials and structure of all aspects of the research and improvement, the research of the hot issues are mainly in the following areas.
(1) rubber material formulations and production techniques to improve the rubber material to have better resistance to electrical damage and aging performance.
(2) The study of silicone rubber material unique water migration characteristics and water temporary disappearance and recovery characteristics which is the composite insulator has excellent resistance to dirt flash the main reason. We will study the reasons for the above characteristics from the mechanism, and strengthen the characteristics from the formulation of the material.
(3) Improve the electromechanical destructive strength of composite insulators in the two aspects of fittings and mandrel manufacturing, China has been able to manufacture composite insulators with electromechanical destructive load of 300 N to meet the needs of 750 kV cross-transmission and 500 kV DC transmission projects.
(4) Research on artificial accelerated aging test method, can be screened out in a relatively short period of time with excellent aging resistance of silicone rubber material formulations.
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