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Normal   021false   false   falsePT-BR   X-NONE   X-NONEMicrosoftInternetExplorer4This paper describes the new primary standard for the ac-dc current transfer at Inmetro, based on PMJTCs and the new shunts manufactured by Fluke for rated currents from 10 mA up to 20 A.The build-up of the ac-dc current scale is described together with the uncertainty budgets which result in final uncertainties at 5 A of 6 µA/A to 12 µA/A in the frequency range from 10 Hz to 100 kHz. The recalibration of the standards after one year showed very small differences which are included in the uncertainty budget.

New generation of AC-DC Current Transfer Standards at Inmetro