Abstract: A insulation-shrinkage prevention device for preventing insulation from shrinking back on a power cable which has synthetic insulation and which is to receive connection equipment on a "prepared" end of said cable, the device including a shouldered ring mounted on said prepared end and secured to the bared conductor, which ring has a fixing shoulder for fixing to the periphery of the insulation, an abutment shoulder for abutting against the end of the insulation, and an integrated retaining device for securing the ring to the bared conductor.

Abstract: A device for protecting the end of a high or very high tension electric cable having synthetic insulation from the effects of insulation breakdown, comprises an insulator and a metal enclosure defining a gastight chamber around said end, which chamber contains dielectric gas under pressure and that is separated from ambient air by a rupture disk provided in the metal enclosure. The device further includes a circularly symmetrical collar protecting said insulator and extending inside the chamber around said cable and terminating in a toroidal rim having a convex face directed towards the cable beyond the breakdown zone inside the chamber and at its end distant from the rupture disk. The device is applicable to protecting the end of a very high tension cable.