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Last Updated on: Tuesday, November 29, 2011 08:14 PM

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AC Current Monitor Circuit
designed by David Johnson, P.E.
The hobby circuit below shows how a small current transformer from Magnetek can be used to monitor AC current to a load.  The AC voltage developed at the secondary of the transformer can be scaled so it can be read by any digital multimeter.  The transformer is rated at 30 amps.

Click on Drawing Below to view PDF version of Schematic

Circuit Circuit Isolated AC Current Monitor circuit designed by David A. Johnson (January 20, 2001)

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