Earthing Materials

The earthing body is a very important part of the power system, its role is to provide a good earthing effect to ensure the safe operation of the power system. The earthing body is generally composed of a conductor and a support structure, and the choice of earthing body’s material is very important for the earthing effect.
Requirements and characteristics
1. Electrical conductivity
The electrical conductivity of the earthing body is the most important aspect in the selection of materials. The higher the conductivity of the earthing material, the better the earthing effect. Common earthing materials are copper, aluminium and galvanised steel, of which copper is the most commonly used material due to its high electrical conductivity and good electrical resistivity.
2. Corrosion resistance
The earthing body has to be exposed to a humid environment for a long time, especially the earthing body installed underground, which is more susceptible to corrosion, so corrosion resistance is also an important consideration in the selection of materials. Common corrosion resistant materials are copper, galvanised steel, stainless steel, etc.
3. Reliability
The role of the earthing body in the power system is very important, so its reliability is also a consideration in the selection of materials. Common earthing materials are copper earthing, steel earthing and magnesium-aluminium alloy earthing bodies. In usage, ther is a need to consider aspects such as the lightning protection performance of the earthing body.