摘要
发现直流电阻性本质安全电路在断开过程中低能电弧放电有三种情况。第一种情况是电弧功率先升后降,放电时间长,出现概率大,属于该类型电路低能电弧放电的典型形式;第二种情况是电弧功率开始慢速最后快速下降,电弧功率较低而放电时间较长,由此解释了为什么有些火花持续时间长却不造成气体引爆;第三种情况是电弧功率在整个放电时间内基本不变,放电时间小,出现概率很小,不会造成气体引爆。最后用放电电流抛物线模型对放电波形进行了仿真。
It was found that there are three types of low-energy arc discharge during the breaking process of resistive intrinsically safe circuits. For the first case, it is a typical case for low-energy arc discharge that arc power ascends to a maximum value and then descends to zero, arc discharge time is long and occurring probability is big. For the second case, it can explain why bigger sparks do not easily cause gas ignition while smaller sparks can cause gas ignition. Because arc power descends slowly all the way and arc power is smaller despite arc discharge time is long. For the third case, arc power is constant, arc discharge time and occurring probability is very small therefore causing no gas ignition. At last mathematical simulation was made using a current parabolic model.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2003年第4期440-442,451,共4页
Journal of China University of Mining & Technology
基金
国家自然科学基金(50077022)
