Description
| Basic type | U40B | U40BP |
| Minimum mechanical failing load (kN) | 40 | 40 |
| Nominal diameter D(mm) | 178 | 178 |
| Nominal spacing H(mm) | 110 | 110 |
| Nominal creepage distance(mm) | 185 | 300 |
| Standard coupling/PIN | 11 | 11 |
| One by one tensile load test | 20 | 20 |
| Wet power frequency withstand voltage (kV) | 25 | 34 |
| Dry lightning impulse withstand voltage (kV) | 50 | 60 |
| Net weight (kg) | 2.1 | 2.5 |
