Item |
Requirement |
8.7/15(17.5) |
12/20(24) |
26/35(40.5) |
5min Power frequency voltage test |
39kV, no flashover, no breakdown |
54kV, no flashover, no breakdown |
117kV, no flashover, no breakdown |
Partial discharge test |
15kV discharge capacity≤10pC |
20kV discharge capacity≤10pC |
45kV discharge capacity≤10pC |
Lightning impulse test |
95kV |
125kV |
200kV |
10 times of positive and negative, no flashover, no breakdown |
Constant voltage load cycle test in air |
22kV |
30kV |
65kV |
The conductor is heated to 95-100ºC, each cycle is 8h, heating 5h and cooling 3H for 60 cycles. |
Partial discharge test at high temperature |
15kV discharge capacity≤10pC |
20kV discharge capacity≤10pC |
45kV discharge capacity≤10pC |
15min AC voltage withstand test |
22kV, no flashover, no breakdown |
30kV, no flashover, no breakdown |
65kV, no flashover, no breakdown |
Negative DC voltage test |
52kV, no flashover, no breakdown |
64kV, no flashover, no breakdown |
156kV, no flashover, no breakdown |
4H power frequency voltage test |
35kV, no flashover, no breakdown |
48kV, no flashover, no breakdown |
104kV, no flashover, no breakdown |
Outdoor termination salt spray test 1000h |
11kV, no flashover, no breakdown |
15kV, no flashover, no breakdown |
32.5kV, no flashover, no breakdown |
Indoor termination humidity test 300h |
11kV, no flashover, no breakdown |
15kV, no flashover, no breakdown |
32.5kV, no flashover, no breakdown |