Voltage Surge Performance of Vacuum-Insulated Cryo-Cable

This paper describes the results obtained from two short experimental lengths of single-phase vacuum-insulated cables, one of which can be cooled by liquid nitrogen. Using a variety of high-voltage sources, it has been shown that there is little correlation between the energy of the source and the damage produced by sparks. Hence, the chances seem good that a cryo-cable connected to a bulk power transmission system will not suffer catastrophically with each internal spark.