Analysis of the Characteristics of Low-resistance Earthing Methods in Medium-voltage AC Systems
Two methods for calculating low resistance values are introduced,and suggestions for selecting resistance values are provided based on the characteristics of low-resistance earthing in medium-voltage AC system,combined with relay protection and system safety requirements.In addition,different earthing methods for medium-voltage AC system have a significant impact on equipment selection.Based on standard specifications,the differences in equipment selection have been sorted out for the reference of designers.
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