Crane proper grounding instructions

  (1) Universal  bridge gantry crane  power supply is directly grounded neutral point of low pressure systems, the overall structure of the metal grounding type should adopt the TN or TT system. TN earthing system used to protect the zero line before the introduction of metal structures, neutral grounding if the distance to the power plant or other protected ground zero line should be done repeatedly over 50m ground, which can reduce common  gantry crane  equipment enclosure to ground voltage leakage reduce the Zero Line enclosure leakage after shock hazard, increasing the phase line in the short-circuit current protection device on the line speed of the action, to shorten the duration of failure, or when the zero line is disconnected, the device will lose any leakage protection.
     (2) Universal  overhead gantry crane  grounding cable and grounding, grounding cable and metal structures (or carts track) must be reliable soldering. Not the line, which ensure the metal structure and the ground conductor continuity between devices.
     (3) ground cable should be selected puzzle section is not less than 2 150 r 10 r puzzle flat or copper, with round grounding cable to do, its diameter should not be less than 13.8 mm.
     (4) through the common ground rail carts gantry cranes, carts rail joints should be a reliable electrical connection.