![]() Has been completed to confirm that the earthing system is adequate, or highlight the need for improvement / redesign. It could also be done after the preliminary design This calculation should be performed when the earthing system is being designed. Ensure that the earthing design is appropriate to prevent dangerous step and touch potentials (if this is necessary).Determine the minimum size of the earthing conductors required for the main earth grid.Using the results of this calculation, you can: The earthing calculation aids in the proper design of the earthing system. Lightning protection is excluded from the scope of this calculation (refer to the specific lightning protection calculation for more This calculation is based primarily on the guidelines provided by IEEE Std 80 (2000), "Guide for safety in AC substation grounding". The earthing system provides a reference potential for electronic circuits and helps reduce electrical noise for electronic, instrumentation and communication systems.Equipotential bonding helps prevent electrostatic buildup and discharge, which can cause sparks with enough energy to ignite flammable atmospheres.The earthing system provides a low resistance path (relative to remote earth) for voltage transients such as lightning and surges / overvoltages.For earth faults with return paths to offsite generation sources, a low resistance earthing grid relative to remote earth prevents dangerous ground potential rises (touch and step potentials).The earthing system provides a low resistance return path for earth faults within the plant, which protects both personnel and equipment.metallic equipment, buildings, piping etc) to the earthing system prevent the presence of dangerous voltages between objects (and earth). Equipotential bonding of conductive objects (e.g.The earthing system in a plant / facility is very important for a few reasons, all of which are related to either the protection of peopleĪnd equipment and/or the optimal operation of the electrical system. ![]()
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