Pin Type Ceramic Insulators
01
ST-20 Pin Type Insulators
Video
specification
| Pin type porcelain insulators | ||
| type | ST-20/J(R) | |
| Dimensions | ||
| Diameter | mm | 175 |
| Height | mm | 185 |
| Total creepage distance | mm | 400 |
| Mechanical Values | ||
| Cantilever strength | kn | 13 |
| Electrical Values | ||
| Type application voltage | kv | 20 |
| Power frequency dry flashover voltage | kv | 85 |
| Power frequency wet flashover voltage | kv | 65 |
| Impulse flashover voltage,positive | kv | 135 |
| Impulse flashover voltage,negative | kv | 135 |
Usage of 20KV ST-20 Pin type Porcelain Insulator
Application: Primarily used on overhead electrical distribution lines operating at voltages typically up to the 22KV range.
Mounting: Screwed onto metal or wooden pins which are mounted vertically on wooden or concrete poles, either directly on the pole top or on crossarms.
Function:
Insulation: To electrically isolate the energized conductor from the grounded pole/crossarm structure, preventing current leakage and short circuits.
Support: To physically hold the conductor in place.
