Abstract
Air core reactors are used widely for fault current limiting applications in the power system. The magnetic field in the vicinity of an air core reactor is larger than iron core reactors due to absence of low reluctance path. Thus the magnetic field around an air core reactor reaches levels hazardous to human life during certain operating conditions. It is important to determine the clearance to be provided from the reactor surface, and the means to reduce this by the use of shielding, so that the magnetic field reduces to a value safer for humans as per the guidelines specified. In this paper, magnetic field analysis of Air Core Reactor without and with shield is done to determine the safety clearance. Effect of changing shielding parameters such as permeability and dimensions on effectiveness of shielding are investigated to obtain an optimal shielding design.
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