High-current synthesis test system and method for low-voltage electric appliance product

Abstract

The invention provides a high-current synthesis test system and method for a low-voltage electric appliance product. The current source system comprises a first switching switch valve, a first loop inductor, a first charging capacitor, a first charging system, a first discharging assembly, a first loop voltage measuring device and a first grounding switch, wherein the first switching switch valve, the first loop inductor and the first charging capacitor are connected in series with a low-voltage electric appliance product, and the first charging system, the first discharging assembly, the first loop voltage measuring device and the first grounding switch are connected in parallel with the first charging capacitor. The voltage source system comprises a second loop inductor, a second switching switch valve, a second charging capacitor, a second charging system, a second discharging assembly, a second loop voltage measuring device and a second grounding switch, wherein the second loop inductor, the second switching switch valve and the second charging capacitor are connected with the low-voltage electric appliance product in series. The first switching switch valve and the second switching switch valve are anti-parallel thyristor valves; and the current source system, the voltage source system and the third loop current measuring device are grounded through a common point. The high-current synthesis test of the low-voltage electric appliance product can be carried out, and the risk is low.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a high-current synthesis test system and method for low-voltage electrical products. Background technique [0002] According to the standard requirements of low-voltage electrical appliances related products, the short-circuit current test is an important part of the test part. The main purpose is to verify that the breaking characteristics of low-voltage products are consistent with their dynamic and thermal stability capabilities. At the technical level, it is quite mature to apply the synthetic circuit to the breaking test of high-voltage circuit breakers. The high-current test circuit based on the LC oscillation principle is a feasible solution for short-circuit testing of low-voltage electrical products. The high-current closing switch in the middle of the circuit adopts a three-pole vacuum switch, and the opening switch adopts two vacuum switches with 6 poles in parallel. Due t...

AI Technical Summary

Problems solved by technology

At the technical level, it is quite mature to use synthetic circuits to conduct breaking tests on high-voltage circuit breakers. The high-current test circuit based on the principle of LC oscillation is a feasible solution for short-circuit testing of low-voltage electrical products. In the prior art, generally in the circuit The high-current closing switch adopts a three-pole vacuum switch, and the opening switch adopts two vacuum switches with 6 poles connected in parallel. Due to the deviation of the closing and opening control time of the circuit breaker and the dispersion of the operating mechanism, there is a vacuum The risk of ablation and welding of a certain pole of the switch

At the same time, this technology can only be used simply to detect the short-circuit and high-current characteristics of the test product, and the function is single.

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