? ? ??

? ? ? Used on railway AC 27.5kV and 26 / 35kV and below in the low-voltage power cable accessories, which is mainly for the cold shrink structure, the use of silicone rubber injection molding in the factory, and then by expansion, lined with plastic spiral supporting.When installed, put these pre-expansion pieces at the end of the cable terminals or the joints, pull out of the internal support of the plastic spiral (support), press on the cable insulation then form cable accessories.At room temperature by the elastic retraction force, unlike the heat shrinkable cable accessories to use heat to shrink.