5.2.4.AC withstand voltage testCables are preferred to use the AC withstand voltage test of 20 Hz to 300 Hz. The test voltage is 2Uo and the pressurization time is 15 min.5.2.5.DC voltage withstand test and leakage current measurement10kV cable DC voltage withstand test and leakage current measurement can instead of 10kV cable AC withstand voltage test,Choose either of the two tests .the standard please refer to Item 6.4.