| Test item | 12/20(24)kV | 18/30(36)kV | 26/35(40.5)kV |
| A.C. voltage withstand test | No flashover, no breakdown at 54kV for 5min. | No flashover, no breakdown at 81kV for 5min. | No flashover, no breakdown at 117kV for 5min. |
| Partial discharge test | 20kV, <10pC | 30kV, <10pC | 45kV, <10pC |
| Heating cycles voltage test | 60 cycles at the temperature of 95-100°C, 30kV | 60 cycles at the temperature of 95-100°C, 45kV | 60 cycles at the temperature of 95-100°C, 65kV |
| Impulse voltage withstand test at 95-100°C | No flashover, no breakdown at 10 positive and 10 negative impulses at 125kV | No flashover, no breakdown at 10 positive and 10 negative impulses at 170kV | No flashover, no breakdown at 10 positive and 10 negative impulses at 200kV |
| 15min, A.C. voltage withstand test | 30kV, 15min. no flashover, no breakdown | 45kV, 15min. no flashover, no breakdown | 65kV, 15min.no flashover, no breakdown |
Complaint
