High-voltage, Low-voltage, High-temperature
Porcelain
Post Insulator
A Type Insulator
High Voltage Power Transmission, Insulation, Electrical Installation
Trough Type
40KN
ISO9001
Grey
Hrd
HRD
Wooden Box
Porcelain
China
Product Description
We can supply High Voltage Porcelain Line Post Insulators with IEC Standard Porcelain Line Post Insulators ANSI 57-5
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.
| 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 |
- 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.
