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High Voltage Post Insulator for Substation and Power Line Applications

Post Insulator – High-performance insulating component providing reliable electrical insulation and mechanical support for high-voltage equipment in substations and power systems.

High Voltage Post Insulator

The post insulator is a vertical, non-porous insulating component, designed to provide electrical insulation and mechanical support for busbars, switches, and other live parts in substations and power systems. Made of high-quality porcelain or composite material, it offers excellent insulation performance, mechanical strength, and resistance to environmental factors such as pollution, moisture, and temperature changes.

Key Features

  • Excellent electrical insulation performance, suitable for high-voltage AC/DC power systems
  • High mechanical strength and impact resistance, ensuring stable support for live parts
  • Superior pollution and weather resistance, suitable for long-term use in harsh outdoor environments
  • Standardized connection dimensions for easy installation and compatibility with various equipment
  • Low maintenance requirements and long service life, reducing overall operational costs

Applications

  • Support and insulation for busbars, circuit breakers, and disconnectors in substations
  • Supporting components for high-voltage switchgear and distribution equipment
  • Insulation and support for overhead power line equipment at substations
  • Power plant, industrial power distribution, and railway electrification projects

Specifications

Type: Porcelain / Composite Post Insulator
Rated Voltage: 10kV / 35kV / 110kV / 220kV / 500kV (customizable)
Material: High-grade Porcelain or Silicone Rubber Composite
Application: Substation, Power Plant, Overhead Power Line
Standard: Compliant with GB/T, IEC and ANSI power industry standards

Type

Porcelain Post Insulator, Composite Post Insulator
Material

High-grade Porcelain, Silicone Rubber Composite
Application

Substation, Power Plant, Overhead Power Line
Function

Electrical Insulation, Mechanical Support

why choose us

With decades of manufacturing experience, we provide reliable industrial products with consistent quality and professional support.

  • Experienced Manufacturer — Decades of experience in manufacturing and product development.
  • Reliable Quality — Strict quality control throughout production to ensure consistent performance.
  • OEM & Customization — Customized products and solutions available to meet different application requirements.
  •  Professional Support — Technical assistance and responsive service from inquiry to delivery.

frequently asked questions

Power fittings, also known as transmission hardware or line fittings, are special metal accessories for overhead transmission and distribution lines, power substations, photovoltaic and wind power projects. They are mainly used to connect, fix and clamp wires, insulators and power poles. Our products adopt hot-dip galvanizing technology for anti-corrosion, suitable for domestic and overseas high-voltage grid projects. We have abundant stock, support bulk wholesale for foreign trade and OEM customized non-standard products, and can provide a full set of export inspection certificates.

Insulators are widely used in high-voltage transmission lines, substations and photovoltaic power projects with two core functions. Firstly, they separate live wires from grounded metal structures such as iron towers and poles to block current leakage and avoid electric leakage accidents. Secondly, they support and suspend overhead cables to bear the weight of wires and wind loads. There are composite insulators, glass insulators and Hot-dip galvanizing is the mainstream anti-corrosion process for power fittings. The coating features strong adhesion and uniform thickness, which can resist outdoor rain, sunlight and coastal salt spray erosion for a long time with an anti-rust service life of more than 15 years. The coating fully wraps steel to isolate air from metal substrate and avoid oxidation, and it won’t get rusty easily after slight bumps. This process meets domestic and foreign power grid construction standards. All exported hot-dip galvanized power fittings can provide salt spray test reports, and bulk orders from overseas are accepted.

Insulators are widely used in high-voltage transmission lines, substations and photovoltaic power projects with two core functions. Firstly, they separate live wires from grounded metal structures such as iron towers and poles to block current leakage and avoid electric leakage accidents. Secondly, they support and suspend overhead cables to bear the weight of wires and wind loads. There are composite insulators, glass insulators and porcelain insulators with good anti-pollution and anti-aging performance, suitable for bulk purchase of domestic and foreign grid export orders.

They are matching supporting parts for transmission lines and indispensable to each other. Insulators insulate live wires from iron towers, while power fittings serve as connecting components to firmly fix wires on both ends of insulators. Whether it is suspension composite insulators, glass insulators or porcelain insulators, they need matching power fittings such as tension clamps, hanging plates and ball eyes for assembly and erection. The whole set jointly ensures the stable and safe operation of high-voltage lines, ideal for one-stop bulk procurement of power grid projects.

Aluminum cutting machines can process all types of aluminum alloy profiles, wood and PVC profiles, featuring a wide range of application scenarios. Widely adopted by window and door manufacturers as well as furniture factories, this machine delivers smooth, burr-free cutting surfaces and is perfect for bulk purchase by processing plants.

Original manufacturers provide OEM & ODM brand customization services. Your brand logo can be printed on the machine body, operation panel, outer cartons and manuals. We also support non-standard functional customization, including feeding stroke, CNC system and dust removal equipment to meet processing demands of doors, windows, furniture and power aluminum profiles. OEM service is available for bulk orders, ideal for machinery distributors and foreign trade sellers to build private brands.

Our factory has been deeply engaged in the power supporting industry chain for years and built a complete upstream and downstream supply layout. On one hand, buyers of power engineering projects need not only line accessories like power fittings and insulators, but also aluminum cutting machines to produce aluminum fittings and aluminum busbars. On the other hand, factories producing doors, windows and furniture that buy aluminum cutting equipment also have demands for supporting power hardware. One-stop supply of multiple categories can cut down customers’ communication and logistics costs caused by purchasing from multiple suppliers. This purchasing model is favored by both domestic engineering contractors and overseas foreign trade buyers. SEO Keywords: power fittings manufacturer, insulator supplier, aluminum cutting machine factory, one-stop power equipment purchase, aluminum processing machine for power industry

Domestic orders can be delivered via special line logistics, full-truck or less-than-truckload transportation, and spot products can be shipped out in a short time. For foreign trade export orders, multiple logistics channels are supported, including full container sea freight, LCL sea freight, railway transport and air freight. Power accessories and cutting machines are packed with export-grade protective materials, and tracking numbers are provided for the whole logistics process. Discounted logistics prices are negotiable for bulk purchases, and door-to-door delivery or delivery to designated ports is available.

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