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.
Material is one part of the selection. The first step is to establish what the insulator must do on the line.
| Insulator Family | Typical Functions | Key Selection Points |
|---|---|---|
| Glass insulators | Pin, line post, stay, suspension and other line-support applications | Insulator type, voltage class, mechanical duty, creepage distance, mounting dimensions and applicable standard |
| ceramic insulators | Primarily suspension and strain strings on overhead lines | Mechanical failing load, disc dimensions, creepage distance, coupling size, electrical withstand ratings and string configuration |
| Composite insulator | Suspension, tension, line post and other transmission/distribution applications | SML or other mechanical rating, creepage distance, housing/profile, overall length and end-fitting interfaces |
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.
Insulators are part of a complete line-support assembly rather than isolated components.
For pin and line-post arrangements, check the selected insulator against the insulator pin or spindle and the electrical cross arm. Suspension and strain arrangements may also require compatible fittings to connect the insulator string to the tower, pole or conductor assembly.
Yipeng also supplies overhead line fittings. If several components belong to the same pole or tower assembly, send the assembly drawing or bill of materials and identify the interfaces that must be matched.
This is especially important for replacement and utility-standard projects, where a correct electrical rating alone does not guarantee dimensional compatibility.
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.
No. System voltage establishes part of the electrical requirement, but the correct insulator also depends on its function, mechanical load, creepage requirement, electrical withstand level, connection interface and applicable standard. Include these parameters or provide the project drawing when requesting a quotation.
There is no single material that is correct for every project. Selection depends on the required insulator function, mechanical duty, pollution environment, maintenance approach, installation weight, existing hardware and utility specification. First confirm the line function and project requirements, then compare the available material families.
Send the existing model or standard designation when available. Otherwise provide the overall dimensions, creepage requirement, mechanical rating, coupling or mounting interface, electrical ratings and clear photographs or drawings of the existing assembly. Replacement compatibility should be checked before ordering.
Yipeng supplies insulators as well as related overhead line hardware. If the insulator must connect to a pin, cross arm or other fitting, include the assembly drawing, bill of materials or interface dimensions so the components can be reviewed together.
No. A fuse cutout is an overcurrent-protection and disconnecting device used on overhead distribution systems. Although it includes an insulating support, its main selection parameters include current and interrupting ratings in addition to voltage and insulation requirements. Fuse cutouts should therefore be specified separately from power line insulators.
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+86 156 1304 7999
+86 319 878 9350
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