Ceramic Post Insulators
0102030405
ANSI 57-2 35KV Porcelain Ceramic Line Post Station Post Insulator
Our Company specializes in the production of porcelain bushing for power transformers below 40kV, and export-oriented DIN, BS, ANSI, and AS standard transformer bushings. The main products are long rod type porcelain insulator below 72 kV, high and low voltage line various type porcelain insulator, Fuse cut-out porcelain insulator, Disconnect switch porcelain insulator and other products. Over the years, we have received high praise from customers in the United States, Thailand, Singapore, Vietnam, Cambodia, Sri Lanka, Australia, Nigeria, Indonesia, Kenya, Brazil, South Africa and other countries and regions.
Detailed Photos
Product Parameters
| ANSI Class | 57-1 | 57-2 | 57-3 | 57-4 | |
| Usual line voltage-kV | 25 | 35 | 45 | 55 | |
| Reference Height/Length "A"-mm | 229 | 305 | 381 | 432 | |
| Nominal Diameter Insulating Part "B"-mm | 140 | 152 | 165 | 178 | |
| Diameter "C"-mm | 102 | 102 | 114 | 127 | |
| Center Hole Nominal Threaded Size "D"-mm | 3/4-10-UNC | 3/4-10-UNC | 3/4-10-UNC | 3/4-10-UNC | |
| Leakage distance-mm | 356 | 559 | 737 | 1015 | |
| Dry arcing distance-mm | 165 | 241 | 311 | 368 | |
| Cantilever strength-kN | 12.5 | 12.5 | 12.5 | 12.5 | |
| Low Frequency Flashover | Dry-kV | 70 | 100 | 135 | 140 |
| Wet-kV | 50 | 70 | 95 | 110 | |
| Positive Critical Impulse Flashover-kV | 120 | 160 | 200 | 230 | |
| Radio Interference Voltage | Test Voltage to Ground-kV | 15 | 22 | 30 | 44 |
| Max. RIV at 1000 KHz-uV | 100 | 100 | 200 | 200 | |
