Sub-screen connections for bonding power cable joints - by clamping the bond strip between screen and elastic insulation

摘要

Conductive screens of e.g., Al around cables insulated by thermoplastic or rubber sheathing are linked by contact witha perforated metal strip, inserted between the screen and the insulation after parting the screen/insulation interface with a suitable hot tool. The crests of the perforations penetrate into the underside of the screen to ensure good contact for electrical bonding. The elasticity of the insulation maintains contact pressure between he screen and the link strip. Opt. the joint is bound using a stocking of polychloroprene threads, binding of stainless steel wire or a heat shrunk sheath. Suitable for joints or terminals on underground cables carrying several kilovolts with Al screening approx. 0.1-mm. thick.