IEC 61788-5:2013涵盖了测定Cu/Nb-Ti复合超导导线的铜与超导体体积比的试验方法。本试验方法和附录中的替代方法适用于横截面积为0.1 mm2至3 mm2、Nb-Ti灯丝直径为2微米至200微米、铜与超导体体积比为0.5或以上的Cu/Nb-Ti复合超导导线。本方法中讨论的Cu/Nb-Ti复合测试导体具有圆形或矩形截面的单片结构。本试验方法是用硝酸溶解铜。本标准中给出了常规试验和其他特定限制所允许的与本试验方法的偏差。铜/铌-钛复合超导导线的横截面积、灯丝直径和铜与超导体的体积比超过极限，可以用本方法进行测量，预计不确定度会降低。 其他更专业的试样试验几何形状可能更适用于超出限制的导体，为简单起见，并保持较低的不确定度，本标准省略了这些几何形状。经过适当修改后，本标准中给出的试验方法有望适用于其他超导复合导线。复合超导体中铜与超导体的体积比主要用于计算超导导线的临界电流密度。使用本国际标准中给出的方法进行的试验可用于提供确定特定超导体适用性所需的部分信息。此外，如果遵守本标准中给出的预防措施，该方法可用于质量控制、验收或研究测试。第二版取消并取代2000年出版的第一版。这是一项技术性修订。主要修订是增加了两个新的附件，“不确定度考虑”（附件E）和“铜与铜/铌超导体体积比试验方法中的不确定度评估”- 钛复合超导体”（附录F）。

IEC 61788-5:2013 covers a test method for the determination of copper to superconductor volume ratio of Cu/Nb-Ti composite superconducting wires. This test method and the alternate method in Annex are intended for use with Cu/Nb-Ti composite superconducting wires with a cross-sectional area of 0,1 mm2 to 3 mm2, a diameter of the Nb-Ti filament(s) of 2 micrometers to 200 micrometers, and a copper to superconductor volume ratio of 0,5 or more. The Cu/Nb-Ti composite test conductor discussed in this method has a monolithic structure with a round or rectangular cross-section. This test method is carried out by dissolving the copper with nitric acid. Deviations from this test method that are allowed for routine tests and other specific restrictions are given in this standard. Cu/Nb-Ti composite superconducting wires beyond the limits in the cross-sectional area, the filament diameter and the copper to superconductor volume ratio could be measured with this present method with an anticipated reduction of uncertainty. Other, more specialized, specimen test geometries may be more appropriate for conductors beyond the limits and have been omitted from this present standard for simplicity and to retain low uncertainty. The test method given in this standard is expected to apply to other superconducting composite wires after some appropriate modifications. The copper to superconductor volume ratio of composite superconductors is used mainly to calculate the critical current density of superconducting wires. The test with the method given in this International Standard may be used to provide part of the information needed to determine the suitability of a specific superconductor. Moreover, this method is useful for quality control, acceptance or research testing if the precautions given in this standard are observed. This second edition cancels and replaces the first edition published in 2000. It constitutes a technical revision. The main revisions are the addition of two new annexes, "Uncertainty considerations" (Annex E) and "Uncertainty evaluation in test method of copper to superconductor volume ratio of Cu/Nb-Ti composite superconductors" (Annex F).