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Power Cable Accessories :   Reliance Corp. Medium Voltage Jointing System

The following describes the typical modules of a medium voltage single and three core jointing for polymeric insulated cable. For transition joints, special oil resistance tubings are used to transform draining oil (MI) as well as non draining oil (MIND) paper insulated cable into a quasi polymeric insulated cable with a radial field. Electrical stress control The stress control tubing and the yellow void filler provide a impedance characteristic which smoothes the electrical field over the connector and cable screen ends. 　 Insulation and screen The outer wall of the insulation/conductive tubing is the insulation screen(red), the inner wall is the conductive polymer(black). This structure ensures a flawless bond between joint insulation and screen. 　 Metallic shielding Copper mesh and roll springs ensure the correct screen connection across the joint area and make electrical contact with the outer screen of the Joint. 　 Outer sealing and protection When heat the outer protection tubing, the pre-coated adhesive melt and flow, resulting in a lasting moisture and corrosion barrier on the cable oversheath. The outer protection tubing provides mechanical impact and chemical resistance as expected from cable oversheaths. For Amoured cables, Reliance Corp. joints provide a galvanized steel joint case.