寄生电感对SPD的影响

对SPD及其连接导线中的寄生电感进行电路分析,指出导线中的寄生电感对SPD安装的影响。寄生电感既能削弱保护装置的箝位限压作用,也能合理利用寄生电感实现多级SPD间的能量配合。并结合某具体案例加以说明。最后指出要科学地认识寄生电感,以减小对被保护设备的危害。

Influence of Parasitic Inductance on SPD

The circuit analysis of SPD and parasitic inductance in the connecting wire were done. It was point- ed out the influence of parasitic inductance in the wire on SPD installment. The parasitic inductance could not only weaken the clamp limiting voltage function of the protective device ,but also realized the energy coordination between the multistage SPD by using the parasitic inductance reasonably. And it was expounded, through specific example, we should know the parasitic inductance scientifically in order to reduce the harm of parasitic inductance to devices which had been protected.