According to the relation between the metal conductor's specific action and resistivity and the analytical formula for the variation of the exploding wire with time brought forward by Hobson, two computational models were developed to explore the electrical characteristics of an electric exploding copper wire opening switch (EEOS) by using the software Pspice. And the voltage across the EEOS was experimentally obtained. The experimental results indicate that the Hobson model is effective only before the vaporization of the electric exploding copper wire; that the specific action-resistivity model can be used to macroscopically describe the whole electric exploding process. So these two models can be used to simulate the high-voltage and high-current circuits with the EEOSs, and the simulated results are helpful for the design of the EEOSs.%根据金属导体电阻与比作用量的关系和A.Hobson提出的金属丝阻抗随时间的变化规律分别建立了2种仿真模型研究电爆炸丝断路开关的电气特性；测量了电爆炸过程中金属丝两端的电压,结果表明:A.Hobson模型只有在电爆炸丝汽化前有效；电阻率-比作用量模型适用于整个电爆炸过程的宏观描述.因此,对含电爆炸丝元件的电路仿真模拟采用电阻率-比作用量模型,结果对脉冲调制中电爆炸丝开关的设计具有一定的指导意义.
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