The charging pile suddenly stopped charging in the middle of the night.

The charging pile suddenly stopped charging in the middle of the night, which is probably a grounding problem.

Grounding means that the neutral point of power system and electrical equipment, the exposed conductive part of electrical equipment and the conductive part outside the equipment are connected to the earth through conductors. Grounding device consists of grounding electrode and grounding wire, which connects electrical equipment with the earth. Charging piles also belong to electrical equipment, so grounding protection is essential.

The main function of grounding is to prevent electric shock, damage to equipment and lines, fire and lightning, electrostatic damage and normal operation of power system.

What harm will be caused by grounding fault or poor grounding?

First of all, the charging pile will not start or the charging will be interrupted.

Secondly, if the cable insulation sheath is damaged due to abnormal conditions, and the grounding is not done at this time or the grounding is poor, the metal part may be charged. When the voltage of the charged metal part exceeds the safe voltage of human body by 36V, once people touch this part, safety accidents may occur.

Why does abnormal grounding cause charging interruption?

During the charging process, Yunniao energy charging pile will take the initiative to detect in real time. If the grounding suddenly fails or the grounding is poor, the grounding disconnection alarm will be reported, and the charging pile will stop charging the current immediately. At the same time, when an abnormality is detected, the leakage protector equipped outside the charging pile will also play a role in safety protection, which double guarantees the charging safety and can be used with confidence in daily life.

What should I do if I encounter grounding problems?

There are different solutions according to different charging scenarios. If charging in a public charging station, in case of grounding problems, it is recommended to call the customer service hotline for repair and wait for repair, and give priority to other idle normal equipment in the station for charging.

If you are charging private equipment at home, in case of grounding problem, first confirm which of the following is your charging pile grounding system, and then understand the corresponding treatment method.

① Ordinary residence: generally equipped with an independent and complete power distribution system. The incoming line of the charging pile is connected to the electric meter corresponding to each household, and the ground line is connected to the bus bar, which is often built by the community developer. If this grounding system is abnormal, it is recommended to contact the property electrician for inspection.

Ordinary residential power distribution system-schematic diagram

② Old-fashioned residence: The distribution system may not be equipped with corresponding bus bars, or the bus bars may not meet the requirements of charging pile equipment. In this case, the charging pile will be grounded separately by "drilling". This grounding system is easily influenced by the environment. For example, the humidity of the air will cause the exposed terminal to rust, which will lead to abnormal grounding.

If it is a separate "drilling" situation, you can first check whether the nut at the connection of the grounding device is tightened and whether there is corrosion. If the nut is loose and rusted, it can be tightened again and the rusted part can be derusted to ensure the reliability of grounding. At the same time, some salt water can be poured into the soil at the grounding electrode to increase the conductivity of the soil.