According to the application comprehensive of the shield, equipotential bonding and surge protective device, the combination protection of the automaticsystem 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。
2
But to perfect the system performance, some accessorial circuits are necessary, such as automatic power control circuit, automatic temperature control circuit and protective circuit etc.