YIPENG is a high-tech enterprise specialized in the production, R&D and sales. We are professional manufacturer in Electric Power Fittings, especially on aerial overhead line fitting and insulating fitting, Composite Insulators, Arrester, Drop-Out Fuse Cutout, Electrical Equipment such as power transmission and distribution products.
1. Insulators can be classified into high-voltage insulators and low-voltage insulators according to the voltage used.
2. Insulators can be divided into porcelain insulators, glass insulators and insulators made of organic materials (epoxy resin) according to their manufacturing materials. Insulators can be divided into indoor insulators and outdoor insulators according to their installation sites.
Advantages: Glass insulators have high mechanical strength, not easy to produce cracks on the surface, slow aging; can eliminate the regular preventive testing of the insulators during operation, no need to conduct "zero value" testing during operation, low operation and maintenance cost.
Disadvantages: Because of the transparency of glass, small cracks and various internal defects and damages are easily found during the shape inspection.
Advantages: Good chemical stability and thermal stability, strong anti-aging ability, and good electrical and mechanical functions, sensitive assembly.
Disadvantages: Defects are not easy to be found, only after a few years of operation will they start to be found; ceramic insulators zero value detection, must board the tower for piece-by-piece inspection, which requires a lot of manpower and material resources; the chance of accidents caused by lightning strikes, fouling flashover is large.
Advantages: Small volume, easy to maintain; light weight, easy to install; high mechanical strength, not easy to break; excellent seismic function, good dirt resistance; fast production cycle, high quality stability.
Disadvantages: Composite insulator less anti-aging ability than ceramic and glass insulators, higher production cost than ceramic and glass insulators.
3. Insulators can be divided into 11 sub-categories and 48 series according to their structure and usage.
High-voltage line rigid insulators: including needle-type porcelain insulators, porcelain cross-arms insulators and butterfly-type porcelain insulators, etc.
According to the structure, the insulators can be divided into four types: all-ceramic type, rubber type, single-arm type and V-shaped; according to the installation form, they can be divided into vertical and horizontal type; according to the 50% full-wave impact flashover voltage, they can be divided into 185kV. 2lOkV, 280kV, 380kV, 450kV, 6IOkV and other levels. It is used for high-voltage overhead transmission and distribution lines, replacing pin type and suspension type insulators, and eliminating the need for high pole porcelain stretchers.
Butterfly insulators for high-voltage lines are divided into two levels of 6kV and lOkV according to rated voltage.
They are used for insulating and fixing wires on overhead transmission and distribution line terminals, tension-resistant and corner poles. At the same time, it is also widely used as a component of the line hardware in conjunction with the line suspension insulator to simplify the structure of the hardware.
High-voltage line suspension insulators: including disc-shaped suspension porcelain insulators, disc-shaped suspension glass insulators, porcelain pull rod insulators and ground insulators, etc.
High-voltage line disk-shaped suspension porcelain insulator is divided into ordinary type and pollution-resistant type. They are used in high-voltage and ultra-high-voltage transmission lines for hanging or tensioning wires and insulating them from towers. Suspension insulators have high electromechanical strength, and are most widely used as they can be applied to various voltage levels and strength needs through different string groups. The ordinary type is suitable for ÷:general industrial area. Compared with ordinary insulators, the dirt-resistant type has a larger creepage distance and a shape that is easy to be cleaned by wind and rain, and is suitable for coastal, metallurgical powder, chemical dirt and more serious industrial dirt areas. It is suitable for coastal, metallurgical powder, chemical fouling and more serious industrial fouling areas. When the fouling resistant insulator is used in the above areas, the size of the tower can be reduced, which has greater economic value.
High-voltage line disk-shaped suspension glass insulator is basically the same as high-voltage line disk-shaped suspension porcelain insulator. Glass insulator has the characteristics of high mechanical strength, mechanical shock resistance, good cold and heat performance, long life, excellent electrical performance and lightning strike resistance, and its umbrella disk is automatically broken when it is damaged in operation, which is easy to find and greatly reduces the insulation detection workload.
High-voltage line porcelain pull rod insulator is used on the terminal endurance and corner pole of lOkV and below overhead power lines for insulating and fixing wires. It can replace part of the butterfly type porcelain insulators and disc-shaped suspension porcelain insulators.
③Bar type porcelain insulator for contact network of electrified railroad.
Low-voltage line needle type, butterfly type, shaft type porcelain insulators: low-voltage line needle type porcelain insulators are used in overhead power lines below 1kV for insulation and fixed conductors. Low-voltage line butterfly porcelain insulator for distribution line terminal, tension and corner pole as insulation and fixed wire. Low-voltage line axial porcelain insulators for distribution line terminals, tensioning and corner poles as insulation and fixed conductors.
Overhead line tensioning porcelain insulator: for AC and DC overhead transmission and distribution lines and communication lines terminal corners or large span pole, balancing the tension on the pole, for tensioning insulation and connection.
Train line insulator: used for insulating and tensioning the wire of the train line or for insulating and supporting the conductive part on the train and power station.
Communication line pin type porcelain insulator: Used for overhead communication line insulation and fixed wire.
Wiring insulators: Including drum insulators, porcelain splints and porcelain tubes, etc.. Used for low-voltage wiring.
High-voltage indoor pillar insulator for power station: for frequency rated voltage 6—35kV indoor power station, substation
electrical equipment busbar and distribution devices. As the insulating support of high-voltage conductive part. It is generally installed at an altitude of not more than 1000m above sea level, with an ambient temperature of 40~40C, and should be used under the condition of no dirt and condensation.
Outdoors pin type pillar insulator: suitable for AC rated voltage of 3—220kV, the ambient temperature around the installation site is 40~+40C and the altitude does not exceed 1000m on the insulation part of the electrical appliances or distribution devices, for insulation and fixed conductor.
Outdoor bar type pillar insulator: used in high-voltage electrical appliances and high-voltage distribution devices, as insulation and fixed conductor. It has replaced a large number of outdoor pin type pillar insulators.
Anti-fouling outdoor bar type pillar insulator: It is suitable for medium fouling area where the density of overlying salt is within 0.1mg/cm2, and is used as insulation and fixing of high-voltage electrical appliances and distribution devices.
High-voltage through-wall casing: including indoor through-wall casing, outdoor through-wall casing, busbar through-wall casing and oil-paper capacitive through-wall casing, etc.
Electrical porcelain sleeve: including transformer porcelain sleeve, switch porcelain sleeve, transformer porcelain sleeve.
Transformer bushings, including power transformers and test transformers with casing bushings and pillar bushings two categories.
Switch porcelain sets including multi-oil circuit breaker porcelain sets, less oil circuit breaker porcelain sets, load switch porcelain sets, explosion-proof switch porcelain sets, isolation switch porcelain sets, air circuit breaker porcelain sets, etc.. Mainly used as the switch's high-voltage lead to ground insulation and for the circuit breaker insulation and internal insulation of the container.
Transformer porcelain sleeve is used as the insulating element of current transformer and voltage transformer.
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+86 319 878 9350
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