Intermittent leakage alarm system

Abstract

The invention discloses an intermittent leakage alarm system which comprises a detection device, a handheld device and a communication medium for connecting the detection device with the handheld device. The detection device comprises a power supply, an operational component, a storage component, a leakage current transformer, a leakage current metering component, a status indicator lamp and a data interface, and the handheld device comprises a power supply, an operational component, a storage component, a touch screen and a data interface. When the intermittent leakage alarm system is used, firstly, the detection is mounted at the position of a circuit to be detected, leakage current is automatically detected for a period of time, secondly, a leakage current alarm threshold at a positionis set at the handheld device, the handheld device is connected with the detection device through a communication data line, thirdly, historical data stored by the detection device are read, leakage conditions of the circuit to be detected at the position are analyzed according to the set leakage current alarm threshold and the stored historical data of the leakage current, assembly and disassembly are easily achieved, the historical data of the leakage current are automatically recorded, and leakage conditions at all positions can be flexibly analyzed.

Description

technical field [0001] The invention relates to the technical field of electric leakage detection, in particular to an intermittent electric leakage alarm system. Background technique [0002] At present, two-level leakage protection is generally used in the power distribution system in rural areas: a total leakage protection device is installed in the distribution transformer, and a false alarm is installed in the residents' homes. Under normal circumstances, when the leaking device in a resident's home is greater than 30mA, it will act directly; and when the leakage current of a single household is less than 30mA, and the accumulated leakage current at the total leakage protection device exceeds a certain limit value, or a certain If the user's leakage current intermittently exceeds 30mA but does not act in time, intermittent leakage trips will occur at the main leakage protection device, which will cause frequent power outages for other users under the line. In this case,...

AI Technical Summary

Problems solved by technology

Under normal circumstances, when the leaking device in a resident's home is greater than 30mA, it will act directly; and when the leakage current of a single household is less than 30mA, and the accumulated leakage current at the total leakage protection device exceeds a certain limit value, or a certain If the user's leakage current intermittently exceeds 30mA but does not act in time, intermittent leakage trips will occur at the main leakage protection device, which will cause frequent power outages for other users under the line. In this case, the leakage fault point is very difficult to find

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