为了在电气化线路上实现列车运行的高速化，必需采用具有高张力的高强度接触导线，以保持在高达时与受电弓的接触。为此，Cu－Cr－Zr合金成为接触导线候选材料。基础试验表明，直径为4mm的线材具有550MPa的抗拉强度、78％IACS（国际造火铜标准）的导电率和良好的磨损特性。试验后，生产了规格为110mm2的接触导线，并在既有线上进行了现场试验。结果表明，新型接触导线具有良好的磨损特性，可投入实际应用。 In order to speed up train operation on an electrified line, it is necessary to use a high-strength high-tension contact wire in order to maintain contact with the pantograph at a high level. For this reason, Cu-Cr-Zr alloy becomes a contact wire candidate material. The basic tests show that a wire with a diameter of 4 mm has a tensile strength of 550 MPa, an electrical conductivity of 78% IACS (International Coppermaking Standard) and good wear characteristics. After the test, a contact wire of 110 mm2 size was produced and field tested on the existing wire. The results show that the new contact wire has good wear characteristics and can be put into practical application.