| Application: | High-voltage, High-temperature |
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| Material: | Semiconductor |
| Structure: | Antifouling Insulator |
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| Domestic designation | U120BLP | U120BLP1 | |
| QOCI Type | UG120B146/450H | UG120B146/550H | |
| Mechanical failing load | kN | 120 | 120 |
| Nominal Diameter D | mm | 280 | 320 |
| Nominal Spacing P | mm | 146 | 146 |
| Creepage distance L | mm | 450 | 550 |
| Socket coupling | mm | 16 | 16 |
| Wet power frequency withstand voltage | kv | 50 | 55 |
| Dry lightning impulse withstand voltage | kv | 125 | 140 |
| Power frequency puncture voltage | kv | 130 | 130 |
| Radio interference voltage(10kV 1MHz) | μv | 50 | 50 |
| Corona visual test P/C | kv | 18/22 | 18/22 |
| Power frequency electric arc voltage | ka | 0.12S/20kA | 0.12S/20kA |
| Impulse puncture voltage | P.U | 2.8 | 2.8 |
| Net weight per unit | kg | 5.8 | 9.2 |
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