资料表明，国内外近年来由于接地不良，造成事故扩大，导致系统停运、设备损坏的例子是不少的。
It is shown in information that the poor grounding has caused failures and resulted in expansion of failure, outage of system and equipment damage both domestically and abroad in recent years.
引起热控设备损坏的原因有电源及信号电缆接地不良、虚接地及利用安装支架作为接地等情况。
Several factors contributes to the damages on control equipment such as the bad grounding of power supply and signal cables, virtual earth and utilizing installing bracket as grounding etc.
在使用时或地线带电时切断电加热管电源，对接地不良的环境下使用饮水机时的人身安全得到保护。
When used or the ground line is charged, cutting off the power supply of the electric heating tube, the personal safety can be protected in the environment of adverse grounding.
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