The influence of impulse current waveform on 50 Hz continuous current of switching type surge protective device(SPD) was studied.
研究了冲击电流波形对开关型电涌保护器（SPD）的工频续流的影响。
According to the application comprehensive of the shield, equipotential bonding and surge protective device, the combination protection of the automatic system is realized.
综合应用屏蔽、等电位连接和电涌保护器等基本防护措施，实现了自动化系统的雷电综合防护。
According to the application comprehensive of the shield, equipotential bonding and surge protective device, the combination protection of the automatic system is realized.
综合应用屏蔽、等电位连接和电涌保护器等基本防护措施，实现了自动化系统的雷电综合防护。
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