Current sensing apparatus

G - Physics – 01 – R

Patent

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Details

G01R 15/18 (2006.01) G01R 1/36 (2006.01) H01H 47/22 (2006.01) H02H 3/08 (2006.01)

Patent

CA 2615622

Disclosed is a current sensing apparatus (100) which includes a first current transformer (102) that, when energized, has a first input current and a first output current, the first output current being less than the first input current, the first current transformer (102) stepping down the current. The current sensing apparatus (100) includes a second current transformer (104) in electrical communication with the first current transformer (102) that, when energized, has a second input current and a second output current, where the second input current is substantially less than the first output current. The second output current being greater than the first output current, the second current transformer (104) stepping up the current. The stepped up second output current is substantially equal to a nominally rated input current of a low voltage device (101) in electrical communication with the second current transformer (104).

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