AC/DC leakage detection method

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United States of America Patent

PATENT NO 11828815
APP PUB NO 20220413062A1
SERIAL NO

17767459

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Abstract

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An AC/DC leakage detection method, which supports the detection of DC leakage and AC leakage. A DC leakage current and a low-frequency leakage current are measured by means of magnetic modulation technology, an AC signal is measured in the form of pure induction, and two detection modes are performed in a time-sharing manner. A collected leakage signal is converted into a digital signal through an AD converter. By means of the method of the present invention, the processing of a leakage signal is divided into three channels for respectively processing DC leakage, low-frequency AC leakage, and high-frequency AC leakage. The overall effective value of residual current is calculated by integrating results of DC detection and AC detection. The method of the present invention supports the detection of a suddenly increased current; and when there is a suddenly increased current, detection mode switching is performed by detecting the current sudden change of the current.

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Patent Owner(s)

Patent OwnerAddress
QINGDAO TOPSCOMM COMMUNICATION CO LTD266000 12 \/ F 4B BUILDING DINGXIN SCIENCE AND TECHNOLOGY INDUSTRIAL PARK NO 858 HUAGUAN ROAD HIGH TECH ZONE QINGDAO SHANDONG QINGDAO CITY SHANDONG PROVINCE 266000

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Liu, Zhen Shandong, CN 379 5095
Wang, Jianhua Shandong, CN 122 667

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