Board back insertion type circuit breaker characteristic detection and test device

Abstract

The invention relates to a test device for detecting and testing the characteristics of a plug-in circuit breaker behind a panel. It includes the control circuit and mechanical mechanism of the device; the control circuit is composed of four cylinder circuits used to connect and disconnect the test electrode and the tested circuit breaker electrode in the control mechanical mechanism and used to provide the test power supply for the tested circuit breaker Regulate the voltage and test the circuit connected to the instrument; the mechanical mechanism includes a pneumatic clamping device fixed on the workbench and a positioning fixture installed on the electrode of the circuit breaker to be tested. The invention can realize that various case circuit breakers are concentrated on one test bench for characteristic detection, thereby saving the cost of the test bench and improving the space utilization rate. The pneumatic pressing device eliminates the energy consumption and variance caused by artificial crimping, and the test current realizes 0-4000A continuous and fine-tuning, which ensures the accuracy of the test current. And the multi-tap transformer realizes gear switching, and the display value of the test current is the actual value, which improves the detection accuracy and efficiency.

Description

technical field [0001] The invention belongs to a test device for detecting the characteristics of a circuit breaker, in particular to a test device for detecting the characteristics of 160 and 250 series plug-in circuit breakers behind the board. Background technique [0002] At present, there are many types of plug-in circuit breaker housings known at present, and each electrode is connected with a cylindrical electrode. During the overload and short-circuit characteristic test of circuit breakers with different housings, different tests must be selected according to different housings. The purchase of multiple test benches increases the investment cost and takes up more space, and the decentralized test mode of different shells reduces the work efficiency of workers; and for the current traditional test benches cannot meet the test requirements For circuit breakers, workers still have to manually crimp the test electrodes on the cylindrical electrodes of the plug-in circu...

AI Technical Summary

Problems solved by technology

[0002] At present, there are many types of plug-in circuit breaker housings known at present, and each electrode is connected with a cylindrical electrode. During the overload and short-circuit characteristic test of circuit breakers with different housings, different tests must be selected according to different housings. The purchase of multiple test benches increases the investment cost and takes up more space, and the decentralized test mode of different shells reduces the work efficiency of workers; and for the current traditional test benches cannot meet the test requirements For circuit breakers, workers still have to manually crimp the test electrodes on the cylindrical electrodes of the plug-in circuit breaker behind the board, and then pass current to test the overload and short-circuit characteristics. In this way, the contact resistance generated by artificial crimping is relatively large. Additional heat loss is added, and detection accuracy and efficiency are reduced

The traditional test bench can only detect the operating time of the long-delay characteristics of the circuit breaker. The short-circuit short-delay operating time cannot be accurately detected, and the grounding protection test cannot be performed. The current value displayed by the ammeter must be artificially set according to the actual current value. Converted to the corresponding value through the formula, the test method is inconvenient, the display current is not intuitive, and the work efficiency is greatly reduced

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