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current transformer abb power grids Calibration factory-sell-directly

Test equipment and its effect on the calibration of ...· PDF filepower grids, since meters which can be directly connected are designed for the nominal voltages of the low-voltage grid. However, in applications in which the maximum ex-pected currents are higher than 100A, transformer-connected meters are used with current transformers connected before them. The task of the instrument transformers is thus to re-

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