G - Physics – 01 – R
Patent
G - Physics
01
R
G01R 19/155 (2006.01) G01R 19/32 (2006.01) H02H 1/00 (2006.01) H02H 3/04 (2006.01)
Patent
CA 2303603
A voltage sensing arrangement is provided that facilitates accurately measuring a sensed voltage while also providing isolation to a sensing path during a test mode of an associated indicator arrangement. The voltage sensing arrangement includes a voltage sensor that is arranged to sense the voltage on an associated power distribution line. A first arrangement is responsive to the voltage sensor for providing an output representing the voltage on the associated power distribution line. The voltage sensing arrangement includes a second arrangement that is responsive to the voltage sensor for isolating the first arrangement from the voltage sensor whenever voltage is not present on the associated power distribution line. In a preferred embodiment, a third arrangement is provided that is responsive to the presence of voltage on the associated power distribution line for isolating a test path from the voltage sensor.
Osler Hoskin & Harcourt Llp
S&c Electric Company
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