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