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Common Insulators For Power Distribution Lines (Down)

Pulished on Feb. 17, 2020

The needle type composite insulators use silicone rubber as the raw material, and the product is integrally molded at one time through high temperature molding. The pin type composite insulator is characterized by light weight, convenient construction and strong resistance to breakdown. Pin type composite insulators have three types of screws: M16, M18, M20

suspension insulators

Suspension porcelain insulators are mainly used for tensile poles of overhead power distribution lines. Generally, a low-voltage line uses a suspension insulator suspension wire, and a 10kV line uses two pieces of insulator string suspension wire. There are two connection methods for suspension metal insulators: ball and socket type and groove type.

Suspension Insulators can refer to topics such as "Main Technical Parameters of Disc Suspension AC Glass Insulators", "Composite Suspension Insulators", "Parameter Meaning and Detailed Drawings of Common Insulators for Overhead Transmission Lines", etc. Below we introduce the meaning of the porcelain insulator model in the old model.

Glass Insulators

Glass Insulators

4 butterfly insulator

Butterfly insulators are called butterfly porcelain insulators, commonly known as tea-pot porcelain bottles. There are two types of high voltage and low voltage. High voltage models include E-1 and E-2. Low voltage models include ED-1, ED-2, ED-3, and ED-4. Butterfly type insulators are mainly used for low-voltage distribution lines as linear or tensile insulators, and also used on 10kV distribution line terminal poles, tensile corner poles and branch poles. In high-voltage power distribution lines, butterfly insulators should generally be used in conjunction with suspension insulators to support a component of the line fittings for the drain wire (jumper).

5 rod insulator (porcelain crossarm)

Line porcelain crossarm insulators are used for insulating and supporting conductors in high-voltage overhead transmission and distribution lines. They are generally used for 10kV line straight poles. It can replace pin, suspension insulators and iron-wood crossbars. Low cost and material saving. Porcelain crossarm insulators are solid porcelain pieces with metal attachments at one end.

Cross arm insulators have composite cross arm insulators in addition to porcelain cross arm insulators. Due to their high bending strength, they can prevent cascading fracture accidents that easily occur in porcelain cross arms. They are irreplaceable products of porcelain cross arms; they are small and light , Strong anti-shock, anti-impact ability, no manual cleaning is required to provide guarantee for safe operation.

6 pull wire insulator

Tensioned porcelain insulators, also called wire round porcelains, are generally used for overhead power distribution lines such as terminals, corners, tensile rods and other wires that pass through the wires to insulate the lower wires from the upper wires, as shown in the figure below.

The main function of the cable insulator is to prevent the cable from being charged. In principle, the cable insulator is installed in the area where people gather, there are people passing through the road, there is a lot of people, and the traffic is heavy. Install other cable insulators in other places as appropriate.

Low-voltage line cable insulators generally use porcelain cable insulators, which are generally represented by J (JH stands for composite cable insulators). The value after the dash indicates the mechanical damage load (kN); 10kV line cable insulators are generally suspended (glass or porcelain) insulator).