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Semi Conductive HV ANSI 57-4 Porcelain Line Post Insulator

Semi Conductive HV ANSI 57-4 Porcelain Line Post Insulator

  • High Light

    ANSI 57-4 Porcelain Line Post Insulator


    Semi Conductive Porcelain Line Post Insulator


    ANSI 57-4 HV Porcelain Insulator

  • Color
    Light Gray
  • Material
    Porcelain C-120
  • Application
    Transmission And Distribution Of Electric Power
  • Standard
  • Size
    Customized Size
  • Sample
  • Oem
  • Pack
    Standard Export Packing
  • Place of Origin
  • Brand Name
  • Model Number
    ANSI 57-4
  • Minimum Order Quantity
  • Price
  • Packaging Details
  • Delivery Time
  • Payment Terms
    T/T, L/C
  • Supply Ability

Semi Conductive HV ANSI 57-4 Porcelain Line Post Insulator


Semi-conductive glazed high voltage Line Post Porcelain Insulator ANSI C29.7





ANSI CLASS Creepage distance (mm) Dry arcing distance (mm) cantilever strength (kN) Lower frequency flashover voltage Critical impulse flashover voltage Test voltage to ground (kV)
Dry(kV) Wet(kV) Positive(kV)
57-4 1015 368 12.5 140 110 230 44



We offers a wide range of porcelain station post insulators. For decades, these products have demonstrated reliable performance in various types of applications all over the world.
Porcelain insulators are the traditional choice for distribution and transmission line, busbar and apparatus insulation. Manufactured from high-
quality non-porous electrical porcelain, they provide long life and cost-effective solutions for a majority of applications.





1. High strength

2. Competitive price and prompt delivery

3. High voltage application

4. Material: Porcelain

5. ANSI Approve





Line post insulators are designed to provide rigid support of conducting cable while offering the maximum resistance to damage from electrical or mechanical events. Horizontal and gain-base line post insulators are often used in applications to avoid the need to install a cross-arm on the pole.



Competitive advantages:


Reasonable insulation structure high reliability of interturn insulation.

Stainless steel flange low magnetic inductivity high resistivity.Small volume light weight.

Convenient transportation and flexible installation.

Low OSS.Low temperature rise.High mechanical strength, strong weather ability.

Outstanding crack resistance.

Low thermal expansion coefficient.