Hydrophobic charged detection device for composite insulators-principle and function

A new type of product that fills the gap in the field of online water-repellency testing of composite insulators in my country. The structure is simple, the operation is convenient, and the judgment is accurate. It is suitable for online detection of the hydrophobicity of 110kV and above transmission line composite insulators. It is also suitable for the hydrophobicity detection experiment and factory inspection of various composite insulators and silicone rubber. It is suitable for the water repellency detection of RTV spraying materials for magnetic insulators. Detection principle The water-repellent state of composite insulators is judged according to the water spray...

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Adhesion test between fiberglass rod & housing in composite insulators

The central weakness revealed in the insulators investigated during this research was poor adhesion-likely the result of production deficiencies. A possible mechanism behind what occurred during service could be that, over time, air-filled voids between the fiberglass rod and the silicone rubber housing filled with moisture due to diffusion through the housing. This eventually led to a partially conductive layer in this interface into which HV potential was transferred from the live fitting along the insulator. The short-circuited path amplified electrical stress and initiated corona, whose impact generally starts by degrading local hydrophobicity. The final result was either...

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Classification of arrestors

There are many kinds of lightning arrester, metal oxide lightning arrester, line type metal oxide lightning arrester, no gap line type metal oxide lightning arrester, fully insulated composite coat metal oxide lightning arrester, unloadable lightning arrester.The main type of lightning arrester has tube type lightning arrester, valve type lightning arrester and zinc oxide lightning arrester. The main working principle of each type of arrester is different, but the essence of their work is the same, in order to protect communication cables and communication equipment from damage.Any questions, you can contact Lydia : [email protected]

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Silicones in their cross-linked elastomeric form are the rubber materials

Silicones in their cross-linked elastomeric form are the rubber materials found in most high voltage insulators and also used as housings for arresters and bushings, among other electrical components. It is therefore worthwhile reviewing the chemistry of this important family of polymers. The proper name for silicones is ‘siloxanes’, which consist of a silicon (not to be confused with silicone) and oxygen backbone that can be cross-linked by different chemical reactions. They can also be modified such that their polymeric structure remains non-reactive at typical application temperatures. These modified products, also classified as polydimethylsiloxanes (PDMS), demonstrate how versatile...

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Composite insulator

The composite insulator is composed of three parts: an insulating core rod, a silicone rubber umbrella cover, and connecting fittings at both ends. Insulating mandrel is the abbreviation of epoxy resin glass avant-garde drawing rod. The main job of the mandrel is to bear mechanical load and has a high tensile strength, generally up to 800~1000Mpa. Its specific strength (in-position strength and weight) The ratio) is 5-6 times that of high-quality carbon structural steel, and the strength cannot be reduced too much under long-term load. At the same time, it is the main part of the internal insulation....

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How to choose the arrester

(1) First fix the base of the lightning arrester, and then install each unit (section) of the lightning arrester in groups from bottom to top.(2) The arrester has passed the assembly test and qualified before leaving the factory. The on-site installation should be strictly assembled according to the manufacturer's number, and can not be exchanged to avoid the change of characteristics.(3) the valve type arrester with series and combined current negative should be selected during installation, so that the nonlinear coefficients between the same phase combination units are close to each other, and the difference value should not...

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Hydrophobic charged detection device for composite insulators-principle and function

A new type of product that fills the gap in the field of online water-repellency testing of composite insulators in my country. The structure is simple, the operation is convenient, and the judgment is accurate. It is suitable for on-line detection of the hydrophobicity of 110kV and above transmission line composite insulators. It is also suitable for the hydrophobicity detection experiment and factory inspection of various composite insulators and silicone rubber. It is suitable for the water repellency detection of RTV spraying materials for magnetic insulators. Detection principleThe water-repellent state of composite insulators is...

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Pollution Performance of Composite Hollow Core Insulators with HTV & LSR Housings

The properties of silicone rubber make it an ideal shell for composite high voltage outdoor insulators.These include stability against UV rays and ozone;Good dielectric properties, not affected by temperature changes;Combustion non-toxic products;Excellent hydrophobic recovery and transfer to the pollution layer;High arc resistors comply with IEC 61621 and high tracking resistors comply with IEC 60587.High temperature vulcanized silicone rubber is commonly used in the casing of large composite hollow insulators, which are manufactured using extrusion technology, and hollow and solid insulators which are manufactured using injection molding technology.In contrast, LSR rubber is commonly used in the casing of large...

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Reasons for measuring voltage distribution of suspension insulators

Measuring the voltage distribution (or zero check) of suspension insulators and multi-element pillar insulator strings is one of the methods to check for degraded insulators. It is carried out without power failure.(1) Characteristics of voltage distribution on the insulator stringThe voltage that each individual element in the suspension insulator string bears is different. This is mainly due to the capacitance between the metal part of the insulator and the ground, the cross arm or the tower, and the point wire, which makes the voltage distribution of the insulator string Very uneven. The voltage drop on the insulators closer...

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Research on Live Cleaning Method of 500kV Post Insulator

With the increase of operating time of 500 kV substation equipment, the pollution degree of pillar insulators becomes more and more serious. The creepage of the insulators is more and more obvious, and the discharge sound increases in rainy and foggy days. Regular cleaning or emergency cleaning of insulators is an extremely effective anti-pollution flashover measure. In response to the requirements of high equipment reliability, there are fewer opportunities for power outage maintenance. At the same time, with the advancement of state maintenance work, there are fewer opportunities for equipment power outages. The hidden danger of flashover threatens...

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