Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Electrical signal parameter measurement system
Reexamination Certificate
2006-09-05
2006-09-05
Wachsman, Hal (Department: 2857)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Electrical signal parameter measurement system
C361S042000
Reexamination Certificate
active
07103486
ABSTRACT:
The monitoring device of a neutral conductor and earth conductor comprises processing means, and first voltage detection means to supply a first signal representative of a voltage between neutral and earth to said processing means. The device also comprises second voltage detection means to supply a second signal representative of a voltage between phase and earth to said processing means, and third voltage detection means to supply a third signal representative of a voltage between phase and neutral to said processing means. The processing means supply a loss neutral of signal and/or a loss of earth signal according to the values of the first, second and third signal. The electrical switchgear apparatus comprises such a monitoring device to trigger opening of main contacts.
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Charioui Mohamed
Schneider Electric Industries SAS
Wachsman Hal
LandOfFree
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