ANSI 57-25 porcelain line post insulator,horizontal line post insulator

ANSI 57-25 porcelain line post insulator can be mounted horizontal on the steel crossarms or wooden poles as a good quality horizontal line post insulator for its super properties of porcelain insulating material.

ANSI 57-25 porcelain line post insulator raw material properties:
Mechanically strong enough to carry tension and weight of conductors
Have very high dielectric strength to withstand the voltage stresses in High Voltage system
Possess high Insulation Resistance to prevent leakage current to the earth
Insulating material is free from unwanted impurities and not be porous
There must not be any entrance on the surface of porcelain line post insulator so that the moisture or gases can enter in it.
There physical as well as electrical properties are less affected by changing temperature.

ANSI 57-25 porcelain line post insulator              porcelain line post insulator ANSI 57-25

For these outstanding specifications, porcelain is most commonly used material for over head insulator in present days. ANSI 57-25 porcelain line post insulator has a better performance because the porcelain is aluminium silicate which is mixed with plastic kaolin, feldspar and quartz to obtain final hard and glazed porcelain insulator material.

ANSI 57-25 porcelain line post insulator parameters:

Type 57-25
Creepage distance mm 1143
Dry arcing distance mm 438
Cantilever strength KN 12.5
Power frequency flashover voltage Dry KV 160
Wet KV


Critical impulse flashover voltage Positive KV 265
Negative 380
Radio interference voltage Test voltage to ground KV 44
Max. RIV at 1 MHz μV 200

Orient is a professional line post insulator manufacturer, the ANSI 57-25 porcelain line post insulator and other horizontal line post insulator products will meet all your requirements.

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Orient is an international line post insulator manufacturer and supplier of high quality porcelain line post insulators and porcelain pin post insulator.
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