Standard Porcelain Line Post Insulators Crack Resistant

• Application: High-voltage, Low-voltage, High-temperature
• Material: Porcelain
• Structure: Pin Insulator
• Type: A Type Insulator
• Usage: High Voltage Power Transmission, Insulation, Electrical Installation
• Connection Method: Trough Type
• Model NO.: ANSI 57-5
• Size of Bearing Capacity: 40KN
• Certification: ISO9001
• Color: Grey
• Brand: Hrd
• Delivery Time: 30days
• Delivery Way: by Sea
• High-Temperature Performance: Excellent High-Trmperature Resistance
• Electrical Performance: with a Breakdown Voltage of 300-400kv
• Transport Package: Wooden Box
• Specification: Porcelain
• Trademark: HRD
• Origin: China
• Production Capacity: 50000

Product Description

IEC Standard Porcelain Line Post Insulators ANSI 57-5 

57-5

1145

438

12.5

160

130

265

44

 

 

 

Descriptions:

Line post insulators shall conform in all respects to the requirements of ANSI standard. 

 

 

 

 

Metal parts shall be made of a good commercial grade of malleable iron, ductile iron, steel, or aluminum. Ferrous parts, other than stainless steel, shall be galvanized in accordance with ASTM A153.

 

Specifications:

 

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)
57-1	356	165	12.5	70	50	120	15

57-2

559

241

12.5

100

70

160

22

57-3

737

311

12.5

125

95

200

30

57-4

1015

368

12.5

140

110

230

44

57-5

1145

438

12.5

160

130

265

44

57-6

1364

489

12.5

180

150

300

44

 

 

 

 

 

 

Competitive advantages:

1. Reasonable insulation structure high reliability of interturn insulation.
2. Stainless steel flange low magnetic inductivity high resistivity.Small volume light weight.
3. Convenient transportation and flexible installation.
4. Low OSS.Low temperature rise.High mechanical strength, strong weather ability.
5. Outstanding crack resistance.
6. Low thermal expansion coefficient.