The JET high DC power test facility and the life testing of a high current ITER switch

JET has available one of the worldʹs most powerful AC/DC multi-convertor systems, with unique capabilities in terms of delivery of high DC voltages and currents. Whilst the primary purpose of the system is the supply of the loads required for the experimental sessions, there is scope for other uses, in particular for testing of high power electrical equipment. The first successful example of the utilization of these capabilities was achieved with the establishment of a new Test Cell powered by the Toroidal Flywheel Generator Convertor (TFGC). The new facility was used for the test of a prototype Bypass switch manufactured within the ITER programme. The aim was to prove the switch is able to fulfil the requirements concerning contact life and general reliability of the assembly.