Ionic grounding electrodes are increasingly being used in large-scale grounding projects due to their good resistance reduction effect, easy construction, and simple operation. So, what is the working principle of ionic grounding electrodes in the entire grounding system?

System principle of ion grounding electrode

The grounding resistance of a grounding device usually consists of three parts.

Part 1: The resistance of the grounding body itself. Usually, the grounding electrode is made of metal, and this resistance only accounts for 1% to 2% of the grounding resistance, which can be ignored;

Part 2: The grounding resistance of the contact part between the grounding electrode and the soil, which accounts for 20-60% of the grounding resistance in general soil;

Part 3: The resistance of the current flowing through the grounding electrode into the soil and dissipating, which is determined by the soil resistivity.

Working principle of ion grounding electrode

1. Working principle of slow-release (ion) grounding electrode

The content of active ions in soil is one of the factors affecting grounding resistance. Many compounds containing active electrolytic ions in soil are relatively rare, and a simple grounding body will not meet the grounding requirements. After experimental comparison, reversible slow-release fillers were added to the grounding electrode. This filler has the characteristics of water absorption, water release, and reversibility. This reversible reaction effectively ensures the effective temperature of the environment inside the shell and the stability of the grounding resistance. This filler has no toxic side effects and has achieved good results in ion generation and corrosion prevention of copper alloys during long-term cooperation with metal electrodes. After the ions generated in this way absorb the earth's moisture, they can be effectively released into the surrounding soil through deliquescence, making the grounding electrode an ion generating device, thereby improving the surrounding soil to meet grounding requirements.

2. Working principle of initiator and enhanced electrolytic ion filler

Through the interaction between initiators and enhanced electrolytic ion fillers, chemical treatment is carried out on the shell soil to reduce its electrical resistivity. At the same time, a transition zone is formed between the slow-release grounding electrode and the earth's soil.  

(1) As a carrier connecting the grounding electrode and the earth, it has the characteristics of good expansibility and strong affinity, which increases the equivalent cross-sectional area of the grounding electrode and the contact area of the soil;

(2) Good adsorption performance eliminates contact resistance between the grounding electrode and soil, improving the distribution of electric field in the ground;

(3) Good permeability, penetrating deep into soil and rock fissures, forming a tree root network, increasing the drainage area in the ground;

(4) Absorb moisture, maintain internal balance of moisture in the shell, and prevent loss;

(5) After passing through pulsed current, no ionization occurs;

(6) Protect the grounding electrode from various corrosion and damage in the soil, and have anti-corrosion effect on the electrode;

(7) The unique negative resistance characteristic reduces the potential distribution gradient between ground surface devices during instantaneous leakage of the grounding body, improving the safety protection and reliability of personnel, equipment, and facilities;

(8) Non toxic and has side effects.

Through the combined action of slow-release grounding electrodes and enhanced electrolytic ion fillers, a shell like internal environment is formed. This internal environment gradually diffuses outwards, completing the chemical treatment of the shell soil. Thus effectively solving many problems in grounding technology and becoming a good technical alternative solution.