U420B High VoltageToughened Suspension Glass Insulator
Product Information
- Model:U420B
- U Refers To Disc Suspension Insulator
- 420 indicates a rated Mechanical failing load of 550kN
- B For Ball And Socket Type
- 205- indicates that the height of the insulator structure is 205mm.
- 360- indicates that the diameter of the insulator disc is 360mm.
- 550- indicates that the creepage distance of the insulator is 550mm.
- Type: Standard profile Toughened Suspension Type
- Rated mechanical load: 420kn (about 42tons)
- Purpose: Widely applicable as insulation support for medium and high voltage transmission lines and substation equipment, capable of stable operation under various climatic conditions.
- The product model is in accordance with IEC60383-1:1993，MOD / GB/T1001.1
- The connection structure is in accordance with GB/T4056-2008(IEC60120:1984,MOD) and BS 3288 part lll.
- According to customer requirements, the locking pin can be either W-pin or R-pin.
- lf there is no special instruction, R pin is used for U420B.
Product drawing
Product parameters
| IEC designation | U420B/205 | |
| Mechanical failing load | kn | 420 |
| Diameter D | mm | 360 |
| Height H | mm | 205 |
| Creepage distance L | mm | 550 |
| Socket coupling | mm | 28 |
| Wet power frequency withstand voltage | kv | 80 |
| Dry lightning impulse withstand voltage | kv | 140 |
| Power frequency puncture voltage | kv | 140 |
| Radio interference voltage(10kV 1MHz) | μv | 50 |
| Corona visual test | kv | 18/22 |
| Power frequency electric arc voltage | ka | 0.12s/20Ka |
| Impulse puncture voltage | P.U | 2.8 |
| Net weight per unit | kg | 16 |
Product Display
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