ANSI 57-1, 57-2, 57-3, 57-4, 57-5, 57-6, 57-7
High-voltage, High-temperature
Porcelain
Post Insulator
A Type Insulator
High Voltage Power Transmission, Insulation, Electrical Installation
550KN
CCC, CE, ISO9001
Brown or Gray
Tkbl
40 Working Days
559mm
9kg
12.5mm
1year
High Quality
C110
TKBL
Carton + Pallet
ANSI
China
8546209090
Product Description
ANSI 57-2 Ceramic Line post Insulators for High Voltage
specifications
1. original insulator producer
2. superior properties of low and medium temperature resistance;
3. strong aging resistance;
4. nice appearance & long service time.
5. comman glaze and semi-conductor glaze, color brown and gray both available.
6. free sample, professional porcelain insulator supplier.
product description
porcelain spool insulator details and parameters
specifications
1. original insulator producer
2. superior properties of low and medium temperature resistance;
3. strong aging resistance;
4. nice appearance & long service time.
5. comman glaze and semi-conductor glaze, color brown and gray both available.
6. free sample, professional porcelain insulator supplier.
product description
porcelain spool insulator details and parameters
| ANSI CLASS | With long stud | 57-1L | 57-2L | 57-3L | 57-4L | 57-5L |
| With short stud | 57-1S | 57-2S | 57-3S | 57-4S | 57-5S | |
| Fig. No. | 1 | 2 | 3 | 4 | 5 | |
| Creepage Distance (mm) | 356 | 559 | 737 | 1016 | 1143 | |
| Dry Arcing Distance (mm) | 165 | 241 | 311 | 368 | 430 | |
| Cantilever Strength(kN) | 12.5 | 12.5 | 12.5 | 12.5 | 12.5 | |
| Power Frequency Flashover Voltage | Dry /kV | 70 | 100 | 125 | 140 | 160 |
| Wet/kV | 50 | 70 | 95 | 110 | 130 | |
| Critical Impulse Flashover Voltage | Positive/kV | 120 | 160 | 200 | 230 | 265 |
| Negative/kV | 155 | 205 | 260 | 340 | 380 | |
| Radio Influence voltage | Test Voltage to ground/kV | 15 | 22 | 30 | 44 | 44 |
| Maximum RIV at 1MHz/uV | 100 | 100 | 200 | 200 | 200 | |
