Abstract
The automatic transfer switch (ATS) is a medium-voltage switchgear, which can improve the reliability and quality of the power supply. The mechanical switch is an important part of the ATS based on the LC resonance, and its breaking time directly affects the overall switching time of the ATS. In order to reduce the breaking time and improve the breaking performance, the optimal design of the mechanical switch is made. Firstly, the working principle of the ATS based on the LC resonance is introduced, the general technical scheme of the magnetically controlled mechanical switch is given, and then, two aspects of increasing the voltage of the driving power supply and the size of the discharge capacitance are considered to reduce the breaking time. Experimental results show that the breaking time of the magnetically controlled mechanical switch is significantly reduced from 15 down to 6.39 ms or so by optimising the design, and the breaking performance is effectively improved, which is conducive to the design of the ATS based on the LC resonance.
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