ARC PROTECTION DEVICE WITH DETECTION OF ELECTRIC ARC LOCATION AND CAPACITY Russian patent published in 2012 - IPC H02H7/26 

FIELD: electricity.

SUBSTANCE: device comprises N photo detectors connected to inputs of analog-to-digital converters (ADC) of a microprocessor, N outputs of which are connected to inputs of appropriate N actuators, and also additionally comprises N+1 resistors of identical resistance, besides, photo detectors are converters of optical flow into electric current and are connected to each other in parallel via resistors 2,…, N, photo detectors 1, N are connected via resistors 1, N+1 to inputs of the first and second ADC of the microprocessor, and the microprocessor is made as capable to detect a number k of the actuated photodetector according to the formula: where round(x) function of rounding up or down to the nearest whole number, U₁, U₂ voltages at the inputs of the first and second ADC accordingly, and also estimation of the electric arc capacity according to the following formula: where W - estimated value of arc capacity, R-resistance of resistors, S-coefficient of photo detector current conversion into electric arc capacity, a digital output of the microprocessor is connected to the indicator of the electric capacity of the arc.

EFFECT: expansion of functional capabilities.

1 dwg