ANSI Clevis type Disc suspension insulator

 The disk-shaped Disc suspension insulator is the most common and important type of line insulator. This insulator is made of iron cap, porcelain insulator and fittings  which are assembling by cement. The Surface of spindle and iron cap and cement contact is coated with a thin buffer layer, generally asphalt, there is a elastic liner between spindle top and  porcelain body. Porcelain surface is generally in brown and gray glaze, iron cap and spindle are  all hot dip galvanized. 

There are two types of disk-type disc suspension insulator: ball-and-socket connection and slot type connection.

The ball-and-socket connection structure is non-directional and has the advantages of easy installation and disassembly of the groove housing, especially convenient for the replacement of insulators on line. Therefore, the ball-and-socket connection structure is generally adopted on the lines of high voltage, ultra-high voltage and ultra-high voltage.

Slot type connection structure  its connection of fittings is simple, but not easy to live work, in our country generally used in low voltage  line. In order to ensure that the insulators do not fall off from the string during operation, each insulator is attached with a locking device, among which a locking pin is used in the ball-and-socket connection structure, a cylinder pin is used in the slot connection structure, and a split pin or a humpback pin is used for locking

Fog Type Disc suspension insulator 

The type of insulator has a long underside of the umbrella, and the product can achieve a large creepage distance. The inner cavity under the umbrella is not susceptible to moisture and has a high pollution tolerance voltage, so it is more suitable for use on AC and DC power transmission lines in coastal areas, humid areas and saline-alkali areas.

Anti-pollution Type  Disc suspension insulator(Double sheds)

Disc suspension insulator of this shape are smooth without edges under the umbrella and form an open shape, so they have good self-cleaning performance in wind and rain, low natural pollution accumulation rate, plus a large creepage distance, so that the products have a good pollution and pressure resistance level, making them been used in a dusty environment. The umbrellalike insulators are known as “aerodynamics” and are adapted to various operating conditions, especially for AC and DC transmission lines in heavy pollution, high altitude and dry desert areas.