Safety protection monitoring device for intelligent meter box

Abstract

The invention provides a safety protection monitoring device for an intelligent meter box, relates to the technical field of safety monitoring of the intelligent meter box of a low-voltage power distribution network, and solves the technical problem of how to monitor a fault arc of the intelligent meter box of the low-voltage power distribution network by utilizing the change of a magnetic field caused by an electric field around the arc. The device comprises a signal detection module, an electric arc fingerprint comparison module, a signal field intensity studying and judging module and an over-threshold alarm module. The signal detection module comprises an induction coil, and the induction coil is a hollow induction coil; the over-threshold alarm module comprises a fault arc simulation generator; the signal detection module, the electric arc fingerprint comparison module, the signal field intensity studying and judging module and the over-threshold alarm module are electrically connected in sequence; and the induction coil is electrically connected with a load. The device does not need to design a fault arc generation device, is simple in structure, is low in cost, is efficient and reliable in monitoring effect, can be widely applied to the safety protection of the intelligent meter box, and has a market popularization value.

Description

technical field [0001] The invention relates to the technical field of safety monitoring of smart meter boxes in low-voltage distribution networks, in particular to a safety protection monitoring device for smart meter boxes. Background technique [0002] Arc fault is an unexpected line arc caused by carbonization of line insulation, air ionization or short circuit. The center temperature of the arc is high, and the area where the arc exists will generate a high ionization pressure, resulting in the release of high-heat gas and electrode material particles where the arc is confined, which can easily cause a fire. According to measurements, the arc temperature generated by a current of about 0.5A can be as high as 2000-3000°C, which is enough to ignite any combustibles. Moreover, when the maintenance voltage of the arc is as low as 20V, it can still exist continuously and stably, and it is difficult to extinguish it. Although the fault arc current is not large, it will gene...

AI Technical Summary

Problems solved by technology

[0003] The current arc fault monitoring products on the market can only monitor this line, but the fault point cannot be determined, so it is impossible to effectively monitor the safety protection of the meter box

For the safety monitoring of smart meter boxes, a common solution is to install smoke and temperature monitoring in the smart meter box. Once an accident such as smog is found in the box due to temperature rise, this solution can provide a certain amount of early warning, but it is necessary for the follow-up Processing increases in difficulty, leaving limited time for troubleshooting

Moreover, how to monitor the fault arc in the device, there is no relevant research technology at present.

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