Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Plural inputs
Patent
1995-09-22
1998-02-10
Karlsen, Ernest F.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Plural inputs
324117R, G01R 2108, G01R 1900
Patent
active
057173273
ABSTRACT:
A current sensor includes a current carrying bus bar configured to define a pair of electrically parallel current carrying paths each having a different cross-sectional area. A sensing device is associated with each of the current carrying paths. One of the sensing devices is associated with a smaller of the current carrying paths and is sensitive to current flow through the bus bar below a threshold level. The other sensing device is associated with a larger of the current carrying paths and is sensitive to current flow through the bus bar above the threshold level. The sensing devices generate output upon detection of current flow through the bus bar. Sensor signal processing means is responsive to the sensing devices and generates output proportional to current flow through the bus bar.
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