... ,4 corer,5 coreTechnical Data: ITEMSTANDARDS&REQUIREMENTS TEST CONTECTpower-frequency withstand voltage test4kV,no-blinking,no-puncturing4kV 1min no-blinking,no-puncturingload ... cooling,conductor temperature is 75°C when heating4h power-frequency withstand voltage test2.4kv,no-blinking,no-puncturing2.4kV 4hno-blinking,no ...