ANSI 57-31 porcelain line post insulator is Horizontal Mounting Clamp-Top Type with Curved Base (2" Trunnion bolt and Locknut), also called gain base type line post insulator.

Gain base type line post insulator specifications:
Short, sturdy sheds of porcelain line post insulator design also contribute to the neat, trim appearance of medern overhead construction.
Bases on Orient clamp top line posts are cemented on the porcelain, loading the porcelain with low intensity compression grip over a large area.
There are no internal bursting forces from pins or inserts to damage porcelain.
All insulator hardware (clamp yokes and bases) is ferrous.
Line terminals are separated by full length of insulator; flashover goes outside the unit.

ANSI 57-31 porcelain line post insulator technical parameters:

ANSI 57-31 porcelain line post insulator applications:
Orient porcelain line post insulators are available for horizontal mounting on wood, steel or concrete poles and steel structures. Curved base for wood pole mounting fits a wide range of pole diameters. Flat base for steel or concrete pole mounting can be mounted directly to pole or on pole gains.

These gain base type line post insulator products are recommended for polluted zones and areas prone to vandal damage. Even if a shed should break there will be little decrease in flashover voltage and power supply will not be disturbed.

Orient Power will do all series of tests for our line post insulators before selling. The line post insulator tests include design tests, quality conformance tests, cantilever-strength test and routine tests. More details about ANSI 57-2 porcelain line post insulator or tie-top line post insulator can be shown for you through emails or online contact.

Relative Articles:
◆Ceramic line post insulator manufacturers
◆72.5KV porcelain line post insulator,gain base line post insulator
◆Porcelain line post insulator tests
◆line post insulators China
◆Porcelain line post insulator hardware
◆Dry process porcelain line post insulator