H - Electricity – 02 – H
Patent
H - Electricity
02
H
H02H 3/08 (2006.01) G01R 19/145 (2006.01) H01H 83/00 (2006.01) H02H 1/00 (2006.01) H02H 1/04 (2006.01)
Patent
CA 2287415
A low cost mixed analog digital application specific integrated circuit (ASIC) includes a standard central processing unit (CPU) programmed to execute a correlation function for arc detection. Use of a standard CPU is possible because need for digital fourier analysis is eliminated by the ASIC architecture. The ASIC includes a power supply configured to be coupled to an AC power line for supplying power to the ASIC components, and further includes a current sensor coupled to a current-carrying conductor for generating a signal representative of current in the conductor. A first analog-to-digital converter (ADC), coupled in series with the current sensor, has its output coupled to a central processing unit (CPU). The CPU supplies a digital-to-analog converter (DAC) with a digital signal representative of a portion of the sensed current. The DAC supplies this signal, in analog form, to a summer, which also receives an output signal from the current sensor. The summed analog output signal of the summer is converted to digital form by a second ADC and is supplied to the CPU. The CPU output is coupled to a trigger, e.g., a trigger of a circuit breaker.
Daum Wolfgang
Staver Daniel Arthur
Company General Electric
Craig Wilson And Company
LandOfFree
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