Mar, 2012
Conference Paper
Very Low Frequency Breakdown Strengths of Electrical Insulation Materials at Cryogenic Temperatures
For long cables or equipment with large capacitance it is not always possible to conduct high voltage withstand tests at 60 Hz due to limitations in charging currents of the power supply. Very low frequency (typically at a frequency of 0.1 Hz) has been used for conventional cables as a way of getting around the charging current limitation. For superconducting grid applicat…