| Minimum mechanical failing load, kN | 70 |
| Minimum mechanical residual strength, kN3 | 56 |
| Diameter of the insulating part, (D), mm | 280 |
| Nominal creepage distance, mm | 445 |
| Ball and socket coupling (d), mm4 | 16 |
| Puncture voltage in insulating medium, kV5 | 130 |
Dry lightning impulse withstand voltage, kV5 (a. One unit, +/- , kV) | 125/125 |
Dry lightning impulse withstand voltage, kV5 (b. Short standard string (5 units), kV) | 465/465 |
Wet power-frequency withstand voltage, kV 5 (a. One unit, kV) | 50 |
Wet power-frequency withstand voltage, kV 5 (b. Short standard string (5 units), kV) | 195 |
| Power frequency withstand voltage, dry, kV | 50 |
| Power frequency withstand voltage, wet, kV | 85 |
| Radio interference voltage, dB/kV | 60/20 86/30 |
| Zinc coating mass, not less than, g/m2 | 600 |