ANSI 57-21 porcelain line post insulator,line post insulator 57-21

ANSI 57-21 porcelain line post insulator or line post insulator 57-21 must be mounted as horizontal way and used for high voltage transmission and distribution line application, so it also called horizontal line post insulator.

 ANSI 57-21 porcelain line post insulator              porcelain line post insulator ANSI 57-21

Horizontal Mounting line post insulator 57-21 with Stud Base is 100% puncture-proof reliability throughout the insulator life. Multiple sheds provide extra leakage distance and uniform leakage path; shaped and spaced for natural cleaning; wind and rain flush off contamination, keep surface resistance high.

ANSI 57-21 porcelain line post insulator technology parameters:

Type 57-21
Creepage distance mm 356
Dry arcing distance mm 165
Cantilever strength KN 12.5
Power frequency flashover voltage Dry KV 70
Wet KV 50
Critical impulse flashover voltage Positive KV 120
Negative 155
Radio interference voltage Test voltage to ground KV 15
Max. RIV at 1 MHz μV 100

ANSI 57-21 porcelain line post insulator specifications:
No special glaze or treatment is required
Small diameter line posts are easy to install, easy to work with hot line tools.
No radio or TV interference
Interchangeable clamp top clamps
Armless construction
Fog type leakage corrugations
The Orient line post insulators get its flashover and leakage values from height rather than spread.

Typically, ANSI 57-21 porcelain line post insulator is supplied without conductor clamps and mounting studs. All auxiliary hardware is available from Orient Power. Orient Power offers line post insulator 57-21 products for a broad range of transmission and distribution applications.

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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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