1. DC cable

(1) DC cable selection should meet the battery string to the inverter DC side of the pressure drop as close as possible to ensure that the farthest from the battery string to the inverter DC side of the total pressure drop is not greater than 2%, special circumstances May be appropriate to relax;

(2) each battery string to the convergence box cable with the same type of cable, should adopt a single-core cable for photovoltaic;

(3) The outlet cable between the outlet box and the inverter should adopt the double-core cable, and the DC cable section can be selected according to the factors such as the conveying distance, the rated current and the pressure drop. The minimum cross section of the cable should be less than 50mm2;

(4) The connection box and the DC cable connection hole should match the cable specifications, and should ensure that the convergence box between the positive and negative core wire after the wiring is convenient and easy to construction;

(5) DC cable with direct burial, cable depth should be based on the local soil frost heaving and the relevant national standards to determine the cable should be clear and short and as far as possible with the path to reduce the amount of excavation; cable buried directly into the ground should wear steel pipe Or PVC pipe.

2.optical cable

(1) field cable used 16-core polyethylene sheathed steel tape armored polyethylene outer sheath direct buried optical cable;

(2) optical cable and 35kV power cable as far as possible with the path laying, to avoid secondary excavation, buried when the laying of high-voltage cable with partitions separated by the distance of 150mm.

(3) optical cable for each box to change the connection between the fiber optic cable junction box, in the length of the length of the path in addition to the box should also be added to the height and the basic depth of the box.

The above is a brief introduction to the DC cable and optical cable laying method, learn more about the contents of the optical cable, please pay attention to kingsignal official website.