Automatic test system and method for voltage endurance capacity of alternating current contactor

Abstract

The invention provides an automatic test system and method for voltage endurance capacity of an alternating current contactor (ACC). The system comprises a sag generator, an ACC, a load power supply,a load, a power quality monitoring system and a computer, the sag generator is connected with the ACC, realizes power supply to the ACC and forms one control loop, the load power supply is connected with the ACC and the load respectively, and one power supply loop that one load power supply supplies power to the load by virtue of the ACC is formed. The system provided by the invention is characterized in that the power quality monitoring system is connected with the sag generator and the ACC respectively and synchronously acquires data of the sag generator and the ACC. The system provided by the invention utilizes the power quality monitoring system for synchronously acquiring switching value signals, so that detection on the voltage endurance capacity of the ACC is realized. The system provided by the invention solves the problem of time synchronization of monitoring data, reduces workload of a tester and realizes automatic testing on the ACC and automatic generation of an endurance capacity report.

Description

technical field [0001] The invention relates to a system and method for drawing a VTC diagram by testing ACC, in particular to an automatic test system and method for voltage withstand capability of an AC contactor. Background technique [0002] With the rise of social production capacity and the increasing proportion of high-end manufacturing, power quality issues have attracted the attention of all parties. As the power quality problem with the highest probability of occurrence and the greatest impact, voltage sag will cause huge economic losses to sensitive industrial users, and has attracted extensive attention from academia and industry. [0003] ACC is a very common way to connect motor loads to the power supply network. It can also be used to control power loads such as factory equipment, electric heaters, working machines and various power units. ACC can not only switch on and off circuits, but also has low voltage release protection. ACC has a large control capaci...

AI Technical Summary

Problems solved by technology

[0019] 1. In the prior art, there is no monitoring system to monitor the sag generator. Due to the influence of the test environment and temperature, there may be a certain difference between the voltage sag set by the sag generator and the actual sag, resulting in Inaccurate test results

[0020] 2. There is no simultaneous monitoring of the sag generator and the equipment under test (ACC) in the prior art, and there is a problem of time asynchrony

[0021] 3. The data acquisition system mostly uses an oscilloscope to record the voltage waveform of the device. It is necessary to manually read the data and judge whether the ACC can withstand the applied voltage sag. The workload is cumbersome, resulting in slow test progress.

[0022] 4. The existing technology is completely manual operation. From the setting of the voltage sag to the final production of the test report, the tester needs to manually operate, the workload is cumbersome and the efficiency is low.

Images