设备外壳组装对内部的保护，针对水的渗入会造成的设备无法使用等级。

Protection of the equipment inside the enclosure against harmful ingress of water.

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自动手动转换开关板应为独立式，室内型、金属外壳装置，保护等级为IP42。

Auto transfer switch panels shall be free standing, indoor type, metal enclosed units with degree of protection IP42.

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进入电子部件外壳的油是非常不寻常的，因为带有任何匹配连接器的RHM传感器是IP67保护，集成电缆具有IP68防护等级。

Oil entering in the electronics housing is very unusual because the RHM Sensor with any mating connector is IP67 protection and with integral cable has IP68 protection rating.

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