Challenges in Sensitive PD Measurements on Extra-Long 525 kV HVDC Land Cables during AC After-Installation Testing by Ronald Plath
IEC 62895:2017, which covers HVDC extruded cables and their accessories for land applications up to rated voltages of 320 kV, demands a DC oversheath test and a DC insulation test with 1 h negative polarity DC voltage, regardless of polarity of the voltage in operation.
