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Grounding Solution
Cabinet Potential Grounding
A general ground bar is installed in the cabinet. Ground terminals of the cabinet are connected to the ground bar using a ground cable with a minimum cross-sectional area of 16 mm2.
The AC input power is from the upstream power distribution system. The cross-sectional areas of ground cables are determined according to IEC 60364-5-54.
Cabinet Grounding
- Metal components and parts of cabinets are properly connected. A structural connection area is protected and applied with antioxidants. An area protected with painting should ensure proper metal surface contact for two connected components. The DC resistance is within 0.1 ohm between any two connected metal components. Use a ground cable to connect two metal components that cannot be directly connected, such as cabinets and cabinet doors. A cable for connecting these two metal components has a minimum cross-sectional area of 6 mm2.
- A ground bar or general ground point is provided in the cabinet for equipment grounding. The ground bar does not need to be insulated.
- A ground terminal is greater than or equal to M8 in dimensions. A yellow ground label
is attached close to the general ground terminal for cabinets.
- Connect equipotential cables to metal components without carrying currents in the module, such as metal doors and windows. Each equipotential cable has a minimum cross-sectional area of 6 mm2.
is attached close to the general ground terminal for cabinets.