The U120B porcelain insulator is a disc-type insulator with a minimum mechanical failure load of 120kN, a nominal diameter of 255mm, a height of 146mm, and a creepage distance of 320mm. Its power frequency breakdown voltage is 110kV.Multiple U120B porcelain insulators can be connected in series to form a suspension insulator string, suitable for high-voltage transmission lines up to 330kV.
Product Detail
Product Parameters
| IEC Class | U120B | U160BM | U160BL | U210B | U240B | U300B |
| Coupling size | 16 | 20 | 20 | 20/24 | 24 | 24 |
| Diameter (mm) | 255 | 280 | 280 | 280 | 280 | 280 |
| Spacing (mm) | 146 | 155 | 170 | 170 | 170 | 195 |
| Creepage distance (mm) | 320 | 350 | 380 | 380 | 405 | 390 |
| Combined M&E strength (kN) | 120 | 160 | 160 | 210 | 240 | 300 |
| Impact strength (N.m) | 10 | 10 | 10 | 11.3 | 11.3 | 11.3 |
| Routine proof test load (kN) | 60 | 80 | 80 | 105 | 120 | 150 |
| power frequency dry withstand voltage (kV) | 70 | 75 | 75 | 75 | 75 | 75 |
| power frequency wet withstand voltage (kV) | 40 | 42 | 42 | 42 | 45 | 45 |
| Dry lightning impulse withstand voltage (kV) | 100 | 110 | 110 | 110 | 110 | 130 |
| Power frequency puncture voltage (kV) | 110 | 110 | 110 | 120 | 120 | 130 |
| Test voltage RMS to ground (kV) | 10 | 10 | 10 | 10 | 10 | 10 |
| Maximum RIV at 1000kHz (kV) | 50 | 50 | 50 | 50 | 50 | 50 |
| Net weight,approximate (kg) | 5.6 | 7.4 | 7.8 | 10.4 | 11.1 | 14.3 |
FAQ
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OEM and ODM orders are warmly welcomed, we have rich successful experience in OEM projects. In addition, our R&D team will provide you with professional suggestions.
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1) We choose all raw materials to be of high quality.
2) Professional and skilled workers pay attention to every detail in handling the production process.
3) The quality control department is specialized in quality inspection for each process.
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We can provide free samples for you to test and check, just bear the freight cost.
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