A large number of outdoor power capacitors are used for reactive power compensation and filtering in HVDC transmission system and such fault as connection failure of wiring terminal becomes more prominent. It is thought

through analyzing the defects of copper metal fittings common used at present

that the main reason of heating is due to oxidization and corrosion of wire and clamp. In this paper

a new type of aluminous metal fittings is designed

which can avoid the defects of copper fittings.