AFDD testing system based on parallel metallic contact arc fault

Abstract

The invention relates to an AFDD testing system based on a parallel metallic contact arc fault. The AFDD testing system comprises a cutting cable testing device, an AFDD testing device and an upper computer measurement and control analysis platform. The AFDD testing device comprises an MCU control unit, a first isolation control module, a second isolation control module, an AFDD testing module and a tripping detecting module. The MCU control unit is electrically connected with the AFDD testing module through the first isolation control module. The MCU control unit is electrically connected with the cutting cable testing device through the second isolation control module. The first testing cable and the second testing cable of the cutting cable testing device are electrically connected with the AFDD testing module through a voltage sensor and a current sensor. The side of the cutting cable testing device is also provided with an arc light sensor. The arc light sensor, the current sensor and the voltage sensor respectively input the acquired arc light, the acquired arc current and the acquired arc voltage signal to the upper computer measurement and control analysis platform through a signal conditioning module and a data acquisition module, thereby realizing electric characteristic research on the arc and obtaining high testing efficiency.

Description

technical field [0001] The invention relates to the field of arc fault testing, in particular to an AFDD testing system based on parallel metallic contact arc faults. Background technique [0002] At present, fires caused by faults in electrical lines and electrical equipment occupy the first place among all fires, and arc faults are one of the main factors causing electrical fires. Arc faults are caused by the aging of live wire insulation or damage by external force, loose terminals, poor electrical connections, etc. Since arc faults are not easy to detect and are different from ordinary electrical faults, traditional protective devices are generally difficult to protect, which will cause continuous The burning arc generates high temperature and ignites other combustibles. If the arc fault is not cut off in time, it is easy to cause a fire. [0003] Arc Fault Circuit Breaker, also known as Arc Fault Detection Device (AFDD), is a new type of electrical appliance used for a...

AI Technical Summary

Problems solved by technology

Since the current range of the parallel cutting cable test is 75A~500A, there are many types of test cable sizes and specifications, and the automatic control is difficult, and the cut test cable is charged after the arc is formed, which makes the steel blade also become a live conductor. Most of the existing cable cutting devices do not take effective insulation measures, cannot cut live wires, and cannot meet the test requirements of B / T31143-2014

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