A properly designed Earthing system is the foundation of any electrical installation to avoid the hazards associated with fault currents and to protect both equipment and people. In a lightning protection system, low ground resistance is essential because lightning current dispersion occurs there. Each down conductor shall have an earth connection, made up of conductive elements in contact with ground capable of dispersing lightning current.
According to the national low voltage electrical technical regulation ”IS 3043”: “Grounding is primarily established to limit the voltage that metal blocks can appear at a given time from the ground, to protect and eliminate or reduce the risk of damage to electrical equipment used.
The main purpose of the low voltage earthing system is:
For effective earthing, it is essential to have a low resistance to ground, use conductors with high corrosion resistance and appropriate cross-section to carry the expected current. Also suitable for securing the joints of said conductors by exothermic or aluminum brazing.
Other decisive factors when designing a grounding system include:
In order to achieve adequate earth resistance in the earthing system, special electrodes for low conductivity soils are used – enhanced electrodes, deep electrodes or plate conductors should be used to achieve the suitable earth resistance.
Perfect Earthing’s not only manufacture the quality products but also the sustainable solutions for the customer’s needs. In early 2000s, We have been enquired for many case studies for the unpredictable problems occurring at Industries, which was carried out in different regions in India. From those studies, we acquired the data that shows the Earth Resistance varies depends on the soil and climatic conditions. We formed a team to study about the properties of the soil at those particular regions and have undergone the soil resistance test to calculate the soil’s electrical resistance. The resistivity of soil varied from 70 to 200 Ω.m. This result, concluded that the soil resistivity changes according to chemical composition of soil.
As per Indian Standard IS3043:2018, the earth resistance value should not be greater than 10ohms and has to maintain the as lowest value for proper dissipation of the current to the earth. To provide sustainable solution, PERFECT EARTHINGS formed a team of Professionals with Extensive Knowledge came out through vast experience in Electrical Earthing and Grounding, developed different patterns of electrical earthing practice and the components used. It is already been implemented for the clients with sensitive earthing problems and achieved extraordinary results.
We customize the solution depending on the problems faced, and provide sustainable long-lasting results.