Vacuum bulb provided with electrical insulation

摘要

The invention relates to an insulated vacuum tube for the breaking of an electric circuit, the tube comprising two electric poles permitting the electrical connection between the outside and breaker contacts placed inside the tube, the body of the tube being dielectrically strengthened by an outer insulator arranged on the tube between the two electric poles, characterised in that the insulator (15) consists of a polymeric sheath heat-shrunk directly onto the body of the tube. <IMAGE>