Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With coupling means
Patent
1995-04-04
1998-05-12
Karlsen, Ernest F.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With coupling means
324130, 361 93, G01R 102
Patent
active
057512841
ABSTRACT:
A signal representative of a rectified current supplied by a current sensor is applied to the input of a correction circuit. The form of the input signal of the correction circuit, deformed with respect to the form of a theoretical signal, is corrected so as to reduce the errors of the rms or mean current values. The output signal of the correction circuit is equal to the input signal if the difference between the output signal and the input signal is lower than a limiting value. In the opposite case, the output signal is equal to a variation signal equal to the limiting value. Application to measuring devices and trip relays.
REFERENCES:
patent: 3509460 (1970-04-01), Mizrahi
patent: 4914385 (1990-04-01), Arinobu
Soviet Patents Abstracts, Section El, Week 9001, 14 Feb. 1990.
Soviet Patents Abstracts, Section El, Week 8848, 18 Jan. 1989.
Blanchard Pierre
Collier James
Suptitz Eric
Karlsen Ernest F.
Phung Anh
Schneider Electric S.A.
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