描述
保护地(CG,Cabinet Grounding)是为了防止设备外壳的静电荷积累、避免造成人身伤害而采取的保护措施。DCS系统所有的操作员机柜、现场控制站机柜、打印机、端子柜等均应接保护地。保护地应接至厂区电气专业接地网,接地电阻小于4Ω。
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