Low resistance earthing module testing in plateau permafrost regions

In order to solve the engineering construction problem of lightning protection in permafrost regions along the Qinghai-Tibet railway, based on the soil characteristics in plateau permafrost regions, Zhongguang Hi-Tech Industrial Development Group set up an earthing test base in Balang mountain, the permafrost condition of which is very similar to that of Qinghai-Tibet railway. Field tests of reducing the earthing resistance were conducted there. This paper introduces the low resistance earthing module and the rationale in its function of reducing earthing resistance. Then the paper briefly describes the test procedure and presents the test result and analysis of test data. The test result verifies that the low resistance earthing module has much better effect than other earthing products in plateau permafrost regions. It also provides some instructive implications for the selection of earthing devices for Golmud-Lhasa section of Qinghai-Tibet railway.