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From Electrical Installation Guide
Fig. S1 – The five main measurement applications in relationship to the supply side and the demand side (DB422830_EN)

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Fig. S9 – Identifying measuring devices in accordance with IEC 61557-12 (DB431009_EN)
Fig. S10 – Uncertainty limits for active energy at Power Factor = 1 (DB422831_EN)
Fig. S11 – Uncertainty limits for active energy at Power Factor = 0,5 inductive and 0,8 capacitive (DB422832_EN)