EVCOME EV charging stations for better life---Top EV charging stations manufacturers & suppliers in China.
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EVCOME EV charging stations for better life---Top EV charging stations manufacturers & suppliers in China.
The drag chain cable is a highly flexible special cable that can move back and forth with the drag chain and is not easy to wear and tear. It is widely used due to its good tensile properties, strength and flexibility. But even so, in some cases, the insulation layer of the drag chain cable will still be broken, and evcome cable will analyze the cause and countermeasure of the failure for you! 1. The overvoltage is broken down. The insulation layer is ruptured due to atmospheric overvoltage or internal overvoltage, especially the internal overvoltage of the system can cause multiple cables to rupture at the same time. An effective measure to deal with this situation is to install lightning arresters to improve the automatic protection level of the system. Second, the mechanical damage is broken down. Heavy objects damage the cable, excavators accidentally damage the cable, excessive bending during laying, severe extrusion of the cable during transportation, and excessive cable tension may cause cable insulation damage or even breakage. Aerial cables can be used to cover cables laid along the wall, and set up obvious geographical marks to prevent soil near the cable line. 3. Insulation breakdown due to moisture. The construction technology of the cable head is poor or the internal protective layer is damaged, so that water invades the inside of the cable: due to long-term vibration and fatigue cracking, the lead-clad cable is laid near the earthquake source; the cable sheath is corroded, causing holes; Holes or cracks that could lead to moisture and penetration of cables. In these cases, the maintenance of the outer layer of the cable should be strengthened, and asphalt should be regularly applied to the outer protective layer. Four, insulation aging is broken down. During long-term operation, due to poor heat dissipation or overload, the electrical and mechanical properties of the insulating material will deteriorate, and the insulating layer will become brittle or broken. The preventive withstand voltage test of the cable entry should be carried out regularly. When the cable insulation cannot meet the requirements of safe operation, it should be replaced with a new cable in time. Five, improper construction was broken down. Due to poor construction methods and poor quality materials used, the cable head and the weak links in between failed and the insulation was destroyed. In order to prevent this situation, the installation quality of the cable head should be improved. During the production and installation of the cable head, the insulation bag should be tight without gaps. At the same time, dry treatment should be carried out to prevent air bubbles and water from entering the cable head, and the insulation treatment at the edge of the lead sleeve should be strengthened. .
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