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Transmission pin insulator contamination is a common problem on overhead lines. The essential element for interruption with contaminated insulators is moisture.
Transmission pin insulator
Wet atmospheric condition results in water filming on insulator surfaces and leakage currents develop. Transmission pin insulator is made from Silicone materials, which offers the ultimate solution in distribution insulators.
The properties of silicone rubber transmission pin insulator
◆ The material inherently resists water filming there by limiting leakage currents.
◆ Insulators with reduced leakage currents, even when contaminated, require less frequent washing.
◆ The saving maintenance cost is yet other benefit in using silicone rubber insulators.
Transmission pin insulator main technical parameters in Iran:
| NO. | unit | DPL3-24L | DPL4-24L | DPL5-24L | DPL5-36L | DPL6-36L | |
| Rated voltage | kV | 24 | 24 | 24 | 36 | 36 | |
| Shed NO. | 3 | 4 | 5 | 5 | 6 | ||
| SML | kN | 6 | 6 | 6 | 4.5 | 4.5 | |
| Section length, H | mm | 265 | 265 | 265 | 320 | 320 | |
| Large shed diameter, D | mm | 140±1 | 140±1 | 145±1 | 140±1 | 142±1 | |
| Small shed diameter, d | mm | 124±1 | 124±1 | 125±1 | 124±1 | 120±1 | |
| Space between two sheds, B | mm | 41.5 | 41.5 | 41.5 | 41.5 | 43 | |
| Leakage distance | mm | 420±5 | 550±5 | 700±5 | 720±5 | 770±5 | |
| Dry arcing distance | mm | 240 | 240 | 240 | 330 | 330 | |
| Lightning impulse withstand voltage | positive | kV | 155 | 180 | 190 | 190 | 200 |
| negative | kV | 165 | 190 | 205 | 205 | 210 | |
| 60Hz flashover power frequency withstand voltage | Dry | kV | 95 | 115 | 120 | 120 | 25 |
| Wet | kV | 70 | 90 | 100 | 100 | 105 | |
| Net weight | kg | 1.170 | 1.510 | 1.690 | 1.690 | 1.690 | |
| Standard package | 12 | 12 | 12 | 12 | 12 | ||
If you want to know more about Transmission pin insulator, please visit Orient Power Website.
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Orient Power is a pin insulator manufacturer of porcelain pin type insulator and composite pin insulators.