| IEC Standard insulators | U70BL | U120B | U160BL | U210BL | U300B | U420B |
| Designation | LXP1-70 | LXP-120 | LXP-160 | LXP4-210 | LXP-300 | LXP-420 |
| ( mm ) Diameter D | 255 | 255 | 280 | 280 | 320 | 360 |
| ( mm ) Spacing H | 146 | 146 | 170 | 170 | 198 | 205 |
| ( mm ) Creepage L | 320 | 320 | 400 | 450 | 485 | 550 |
| ( mm ) Ball and Socket soupling | 16 | 16 | 20 | 20 | 24 | 28 |
| ( kN ) Mechanical failing load | 70 | 120 | 160 | 210 | 300 | 420 |
| ( kN ) Mechanical routine test | 35 | 60 | 80 | 105 | 150 | 210 |
| ( kV ) Wet power frequency withstand voltage | 40 | 40 | 50 | 50 | 50 | 50 |
| ( kV ) Dry lightning impulse withstand voltage | 100 | 100 | 110 | 125 | 130 | 140 |
| ( P.U ) Impulse puncture voltage | 2.8 | 2.8 | 2.8 | 2.8 | 2.8 | 2.8 |
| ( kV ) Power frequency puncture voltage | 130 | 130 | 130 | 130 | 130 | 130 |
| ( µV ) Rodio influence voltage | 50 | 50 | 50 | 50 | 50 | 50 |
| ( kV ) Corona visual test | 18/22 | 18/22 | 18/22 | 18/22 | 18/22 | 18/22 |
| Power frequency electric arc voltage | 0.12s/20kA | 0.12s/20kA | 0.12s/20kA | 0.12s/20kA | 0.12s/20kA | 0.12s/20kA |
| ( kg ) Net weight per unit | 3.6 | 4.2 | 6.5 | 7.3 | 10.6 | 16 |