SEALED AVERAGE VOLTAGE ELECTRIC BUSH

摘要

The invention relates to sealed electric bushes used for supplying electric power though sealed enclosures of nuclear power stations, nuclear-powered transport means, subway tunnels etc. The aim of said invention is to provide the lasting sealing of electric bushes by increasing the resistance thereof to electrochemical corrosion action. The inventive sealed bush comprises a gas-pressurised metal body, through insulators which are connected to the body by means of thin-walled adapters and bellows and a solid-state current conducting rod which is provided with a rigid insulation and sealingly placed inside said through insulators and is characterised in that the bellows surfaces are provided with a metal-ceramic coating which is made from titanium trinitride and whose thickness ranges from 8 to 30 mkm.