Thermal protection is provided in systems utilizing high-current double-layer capacitors. The component includes a central core encompassed by a plastic or elastic layer, which is provided with the at least one groove, where the groove is designed for holding the cable or tube element within it, while allowing the cable or tube element to move substantially radially in the groove when the umbilical is bent and that the layer is made from several plastic or elastic elements. A cam lock on the other member engages the locking member when the cam lock is rotated to pull the frame and the stock into contact with one another. A secondary cooling fluid flow path extends in a direction that is different than the direction of the primary cooling fluid flow path. These principles are then translated into online algorithms for failure detection.