154HC Mast Section The importance of grounding tower crane, grounding should meet what requirements?
tower crane grounding can be used as not only a repeated ground of TN -- s zero protection system for temporary electric engineering on site, but also as lightning protection ground of tower crane itself. In order to fully reflect the importance of tower crane grounding, tower crane grounding should meet the following requirements:
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1. The power frequency grounding resistance value of grounding device should not be more than 10. 2, the grounding device should have two places with the tower crane track for electrical connection. The two ends of the tower crane rail should be connected by ring-shaped metal. 4. The two ends of the tower crane rail connection should be connected across the metal wire connection to ensure electrical connection. 5, the Tower Crane track should be protected to connect to zero, that is, it should be connected to the protective zero line PE to make the electric connection.
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