This report describes a supplementary comparison on current ratio at power frequencies. The traveling standard was a high precision current transformer. Frequencies of 50 Hz and 60 Hz were used with a current range between 5 A and 1000 A. Participants belong to SIM, except the national metrology institute of Germany, PTB, that belongs to EURAMET. The pilot institute was UTE, from Uruguay. The measurement results and uncertainties from all national metrology institutes, that have declared CMCs, were in agreement with them. The schedule had long delays due to customs procedures, but had no influence on the results due to the very high stability of the traveling transformer. == Main text To reach the main text of this paper, click on Final Report [https://www.bipm.org/utils/common/pdf/final_reports/EM/S8/SIM.EM-S8.pdf] . Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/... [http://kcdb.bipm.org/]

中文翻译：

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仪表电流互感器的补充比较

该报告描述了在电源频率下电流比的补充比较。运行的标准是高精度电流互感器。使用的频率为50 Hz和60 Hz，电流范围为5 A至1000A。参与者属于SIM，但德国国家计量院PTB属于EURAMET。试点研究所是乌拉圭的UTE。宣布为CMC的所有国家计量机构的测量结果和不确定性均与它们一致。由于海关程序的原因，进度表有很长的延迟，但由于行进变压器的很高的稳定性，进度表对结果没有影响。==正文要访问本文的正文，请单击最终报告[https://www.bipm.org/utils/common/pdf/final_reports/EM/S8/SIM.EM-S8.pdf]。