针对传统限流型和截流型本安保护电路精度差、效率低，以及参数设置灵活性差的问题，在分析研究本安保护电路模式的基础上，设计了一种基于电流检测芯片、电压比较器和单稳延时电路的截流自恢复型本安保护电路。将新型截流型本安电路与传统型限流保护电路进行性能对比测试，结果表明，设计的本安电路具有反应快、效率高、内阻小等优势。

In order to solve the shortcomings of low protection accuracy, low efficiency and poor parameter setting flexibility of traditional current-limited and current-intercepted intrinsically safe protection circuits, on the basis of analyzing the intrinsically safe protection circuit mode, a self-recovery intrinsically safe protection circuit based on current detection chip, voltage comparator and monostable delay circuit was designed.The performance of the new current-intercepted intrinsically safe circuit and the traditional current-limited protection circuit was compared and tested.The results show that the designed intrinsically safe circuit has the advantages of fast response, high efficiency and small internal resistance.