Grading Ring Accessory | Protective Fitting for High-Voltage Insulators

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.