What are the means of grounding protection for EV chargers?

Main Technical Means of Grounding Protection

 Grounding Conductor：

• Definition: A grounding conductor refers to a wire used to connect the metal enclosure of an electrical device to the earth.

• Function: When an electrical device has a leakage, it provides a low - impedance path so that the leakage current can quickly flow to the earth.

 Grounding Electrode：

• Definition: A grounding electrode refers to a metal rod or metal plate buried underground, which is used to form a good electrical connection with the earth.

• Function: It provides a stable grounding reference point to ensure the effectiveness of the grounding system.

 Ground Resistance：

• Definition: Ground resistance refers to the resistance between the grounding electrode and the earth.

• Standard: The ground resistance usually needs to meet certain standard requirements. For example, it should not be more than 4 ohms (the specificvalue varies according to the regulations of different countries and regions).

• Measurement: Regularly measure the ground resistance to ensure it is within the qualified range.