METHOD OF MULTICHANNEL CONTINUOUS MONITORING AND PREDICTION OF CURRENT-SPREADING RESISTANCE OF GROUNDING DEVICES OF AN OBJECT Russian patent published in 2019 - IPC G01R27/20 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering and can be used to measure resistance to current spreading on objects using several earthing switches. Method of multichannel continuous monitoring and prediction of current resistance of grounding current spreading consists in the fact that auxiliary potential electrodes are installed by the number of earth conductors on object, external contact potential difference between grounding devices and auxiliary potential electrodes is determined, earthing and auxiliary potential electrodes are connected through high-resistance load resistors and serially connected amperemeters, current flowing through load resistors is measured. At that, threshold values of current flow resistance are entered and memorized, required periodicity and sequence of measurements of resistance to current spreading of all earthing devices of the object are set. Further, the local computer network of the object is turned, converting the measured value of current and voltage into digital form, generating and transmitting obtained digital values characterizing state of i-th earth electrode in electronic log of current flow resistance control. Based on the transmitted values, current spreading resistance (CSR) of each earthing switch is calculated and memorized. By comparing preset CSR threshold and obtained data, signal on non-fulfillment of preset requirements is generated. Approximating a plurality of previously obtained values of current flow resistance and predicting CSR for each earthing device.

EFFECT: high timeliness of obtaining data on CSR of all grounding devices of an object, as well as possibility of predicting time and conditions of possible violation of specified requirements.

1 cl, 2 dwg