High Voltage Porcelain Post Insulator 57-2

Working Principle of Post Porcelain Insulator

From an electrical perspective, the ceramic components of post porcelain insulators effectively prevent current from conducting between the supporting structure and the wires or electrical equipment, serving as insulation. The insulation performance is achieved through the high electrical resistivity and high dielectric strength of ceramic materials.

Mechanically, column ceramic insulators withstand various forces such as the weight of wires, wind loads, and ice loads, ensuring the stable operation of electrical systems. For instance, in a 10kV overhead distribution line, column porcelain insulators are installed vertically on the cross arm to support the wires, ensuring insulation and bearing the weight and potential wind loads.

Types of Post Porcelain Insulators

• ANSI Class Type No. 57-1 S/L
  • Creepage Distance: 356 mm
  • Dry Arcing Distance: 165 mm
  • Cantilever Strength: 125 kN
  • Flashover Voltage Dry: 80 kV
  • Flashover Voltage Wet: 60 kV
  • Critical Impulse Flashover Voltage Positive: 130 kV
  • Critical Impulse Flashover Voltage Negative: 155 kV
  • RIV Data to Ground: 15 kV
  • Maximum RIV: 100 kV
• ANSI Class Type No. 57-2 S/L
  • Creepage Distance: 559 mm
  • Dry Arcing Distance: 241 mm
  • Cantilever Strength: 125 kN
  • Flashover Voltage Dry: 110 kV
  • Flashover Voltage Wet: 85 kV
  • Critical Impulse Flashover Voltage Positive: 180 kV
  • Critical Impulse Flashover Voltage Negative: 205 kV
  • RIV Data to Ground: 22 kV
  • Maximum RIV: 100 kV

Product Details

Product Name: Porcelain Insulator

Model Number: 57-2

Material: Porcelain

Application: High Voltage Insulation

Rated Voltage: 12kV/33kV

Brand Name: Huayao

Standard: IEC60383

Color: Brown/White

Place of Origin: Jiangxi, China

Dimensions and Mechanical Values

• Diameter (D): 152 mm
• Spacing (H): 305 mm
• Creepage Distance: 559 mm
• Cantilever Strength: 125 kN

Electrical Values

Dry Flashover Voltage: 110 kV

Wet Flashover Voltage: 85 kV

Critical Impulse Flashover Voltage Positive: 180 kV

Critical Impulse Flashover Voltage Negative: 205 kV

Radio Influence Voltage Data

• Test Voltage RMS to Ground: 22 kV
• Maximum RIV at 1000 kHz: 100 μV

Related Products and Production Process

The production process of porcelain insulators at Jiangxi Huayao Electric Co., Ltd includes the following steps:

• Mix Raw Materials
• Make Blank Shape
• Drying
• Glazing
• Put into Kiln
• Glue Assembly
• Routine Test and Other Tests
• Finished Products Packaging

Workshop and Customer Visits

Jiangxi Huayao Electric Co., Ltd offers a comprehensive workshop environment and regularly hosts customer visits to showcase their production capabilities and quality standards.