The editor of the graphite based flexible grounding body will introduce an overview of protective grounding. What is protective grounding? The so-called protective grounding is the practice of tightly connecting the metal shell of electrical equipment, the structure of power distribution equipment, and the line tower to the grounding body deeply buried underground through a protective grounding wire to prevent the electrical equipment from being electrified and endangering personal and equipment safety. Grounding protection is generally used in power supply systems where the neutral point of distribution transformers is not directly grounded (three-phase three wire system), to ensure that the ground voltage generated when electrical equipment leaks due to insulation damage does not exceed the safe range. The so-called protective grounding is a protective wiring method that reliably connects the metal parts of electrical appliances that are not charged under normal circumstances but may be charged after insulation material damage or other situations (i.e. the metal structural parts that are insulated from the charged parts) to the grounding body with wires. This is what the editor of graphite based flexible grounding body introduces to you as protective grounding.

Measures to ground the metal casing of electrical equipment. It can prevent strong current from passing through the human body when the metal shell is electrified due to insulation damage or unexpected situations, ensuring personal safety.

Example of application principle:

If household appliances do not use grounding protection, when a part of the insulation is damaged or a phase line touches the casing, the casing of the household appliance will become electrified. If the human body touches the insulation damaged casing (structure) of the electrical equipment, there is a risk of electric shock. On the contrary, if electrical equipment is grounded for protection, a single-phase grounding short circuit or leakage fault will generate a large short-circuit current or leakage current in the circuit, which will affect the higher-level protection devices (circuit breakers or above). The editor has introduced an overview of what protective grounding is. We hope that if you encounter similar problems in future applications, you will know their theoretical knowledge.