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Khaled Abuzaid
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On which standard IEEE / IEC BS EN / NEC...we can find recommendation on combining Grounding Networks of LV and MV/HV together?
A combined LV/MV grounding network is a system of interconnected conductors and electrodes designed to provide a safe path for the dissipation of electrical faults in both low voltage (LV) and medium voltage (MV) systems.
A combined LV/MV grounding network is necessary to protect electrical equipment and personnel from the hazards of electrical faults, such as overvoltages and short circuits. It also helps to maintain system stability and reliability.
A combined LV/MV grounding network is designed by considering the characteristics of the electrical system, the soil conditions, and the required level of protection. It involves calculating the earth fault currents, determining the type and location of electrodes, and selecting appropriate conductors and connections.
The different types of electrodes used in a combined LV/MV grounding network include rods, plates, mats, and grids. Each type has a different shape and size, and is chosen based on the specific requirements of the grounding network.
The effectiveness of a combined LV/MV grounding network is measured by its grounding resistance or impedance, which indicates the ability of the system to dissipate fault currents. This is typically measured using specialized instruments such as ground resistance testers or clamp-on meters.