The bus system is composed of conductive copper pipe (copper bar, aluminum alloy pipe, bar), insulating shielding layer, connecting layer and outer sheath protective layer. Main insulation material in constant temperature and humidity dust-free state, directly composite on the conductor. A capacitive screen is applied, and a full-length grounding screen is installed outside the insulation layer, and a heat-shrinkable bus, bushing or metal bushing is connected to the surface of the formation.
