Porcelain disc suspension insulator can install on distribution and transmission line in the light of insulator voltage. Such as installation on high voltage, the type suspension insulator can be called high voltage porcelain disc suspension insulator. 

                        
    high voltage porcelain disc suspension insulator        porcelain disc suspension insulator                

Porcelain disc suspension insulator classification:
Porcelain disc suspension insulators are furnished with either ball-and-socket or clevis-eye configurations. The ability for porcelain disc suspension insulator to be connected with other similar insulators is assured by conformance to ANSI standards. Routine checks are made with gages.
Positive locking of both types is attained by using a humped-type cotter key to prevent unintentional uncoupling during service or handling.
The ball-and-socket design has enjoyed a greater popularity over the years because of the overall flexibility and the lack of loose parts. The self-contained split cotter key, by virtue of its hump, can be maintained in either the locked or unlocked position.

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