低压断路器交流短路电弧伏安特性的研究

Research of Low Voltage Circuit Breaker AC Short-Circuit Arc Volt-Ampere Characteristics

研究了低压断路器交流短路电弧的数学模型及其伏安特性;并以GB 14048.2—2008中规定的短路试验要求为基础,搭建了试验回路平台,分析了不同电压与预期电流对断路器短路电弧伏安特性的影响;通过对试验波形及数据分析,得到电弧电压、电弧电流与试验电压、预期电流成正比,与燃弧时间成反比。可为研究交流短路电弧提供重要的现实依据。

The AC short-circuit arc mathematical model and voltage-ampere characteristic of the low voltage circuit breaker were studied. The experimental platform was built to analyze the influence of different voltage and current to the arc voltage-ampere characteristics of the circuit breaker based on the test requirements specified in GB14048. 2—2008. Through the experimental data and waveform analysis,the arc voltage and arc current is proportional to the test voltage and current,but is inversely to the arcing time. This paper provided an important practical basis for study of AC short-circuit arc characteristic of the low voltage circuit breaker.