Electrical Grounding of Power & Communications Facilities for Tactical Operations in Arctic Regions

摘要

The problem of electric earth grounding in cold regions is primarily one of making good contact with high resistivity soils. Where frozen, high resistivity materials are encountered, optimum grounding of power and communication circuits can only be accomplished by special attention to both surface and subsurface terrain. The fact is that the resistance of frozen soils can be ten to a hundred times higher than in the unfrozen state. Permafrost, which is encountered throughout the arctic and portions of the subarctic, affects grounding. During tactical operations on ice fields and glaciers or in deep snow when the arctic and subarctic are overlain with snow and ice, terrain evaluation, landform, and recognition of soils are difficult and impractical. Illustrations are included throughout this report to outline various established methods to test, measure, construct, and maintain grounding systems.