Device capable of automatically monitoring performance of voltage limiting type surge protection device

Abstract

The invention discloses a device capable of automatically monitoring the performance of a voltage limiting type surge protection device. The device comprises an overvoltage monitoring module, a leakage current monitoring module and a single-chip microcomputer processing module. According to the device, the change conditions of the performance of the surge protection device are automatically identified by monitoring the action frequency of the voltage limiting type surge protection device and the leakage current value of the voltage limiting type surge protection device under the action of line voltage. The device can automatically record the action frequency and time of the surge protection device and monitor the amplitude value and change trend of lightning overvoltage according to actual weather conditions; the magnitude of the current in the surge protection device is monitored so that the device can automatically judge the performance of the surge protection device. The circuit of the device is simple in structural design, and the device has the advantages that the complete device is stable in performance and working, the anti-jamming capacity is high, the tolerance of insulation is high, and the accuracy of detected data is high.

Description

technical field [0001] The invention relates to a device for automatically monitoring the performance of a voltage-limiting surge protector, which belongs to the field of lightning science and technology. Background technique [0002] With the rapid development of modern communication and microelectronics technology, electronic equipment is developing towards miniaturization, which leads to the continuous reduction of its working voltage, which leads to the weak tolerance of the above-mentioned electronic equipment to lightning overvoltage and current. Under the action of lightning overvoltage , these devices are easily damaged, and in serious cases, accidents such as fire may occur, endangering the safe operation of the power electronic system. [0003] As an overvoltage protection device, the voltage-limiting surge protector is usually connected in parallel at the front end of the protected equipment, which limits the lightning overvoltage intruding into the power transmis...

AI Technical Summary

Problems solved by technology

[0004] However, under the action of long-term line voltage, or under the influence of external environments such as lightning overvoltage, operating overvoltage, high temperature, and high humidity, the performance of ZnO varistors will change, thereby reducing the protection efficiency.

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