Gantry crane brief characteristics of the power supply system

      Gantry crane power system characteristics are as follows:
    1,  gantry crane  power system during normal operation, there is not a current online special protection, just work with the zero line current imbalance. PE line on the ground there is no voltage, so the electrical equipment metal casing then zero protection is connected to the PE exclusive line of protection, safe and reliable.
    2, gantry cranes zero line of work is only used as a single-phase lighting load circuit.
    3, special protection of PE allowed to break, and do not enter the GFCI.
    4, the trunk using leakage protection, zero line of work can not have duplicate grounded while the PE grounding lines are repeated, but without leakage protection, so the TN-S system can also be installed on the supply mains leakage protection.
    5, TN-S mode power supply system safe and reliable, suitable for industrial and civil buildings and other low-voltage power supply system. Gantry cranes at construction workers work in front of "leveling" (electricity, water supply, roads and horizon - must TN-S mode power supply system.
    6, TN-CS mode power supply system  bridge gantry crane   at construction temporary power, if the first part is a TN-C mode power supply, and construction specification construction site must use TN-S mode power supply system, you can live in the latter part of the system Total distribution box ceded PE line.