Screen Connection for MV cables with laminatd Aluminium screen

Abstract

The medium voltage cable of the future will probably have an aluminium conductor and a laminated aluminium screen. The increasing use of conductor cross sections up to 1200 mm² leads to screen currents of much more than 100 A. This brings some problems for the grounding devices of such a cable. There is no international test standard for ground screen connecting devices. That’s why CIRED established the working group “CIRED WG 2017-1 Test Recommendation for Ground Screen Power Cable Connections”This paper gives an overview on possible screen currents and shoes test results of long-term tests with different grounding devices on cables with laminated aluminium screen