< p="">    Polymer Cable Tray Common four major types of failures, as well as troubleshooting reasons:
    The first type of fault: the entire cable is blown or a phase is blown. This type of fault causes the current relay on the power distribution cabinet to operate, and the cable is at the fault. Bad very serious. The reason may be that the polymer cable tray has poor thermal insulation properties or is not flame retardant. The polymer polymer cable tray produced by Shandong Hanming does not produce harmful substances at high temperature, and has good heat insulation and insulation and flame retardancy.
    The second type of fault: all phases of the cable are short-circuited. Similarly, such faults cause the current relay and voltage relay on the power distribution cabinet to operate, and the cable is also seriously damaged at the fault point. The reason may be that the structure of the polymer cable bridge itself has a negative effect on the cable. The polymer polymer cable tray produced by Shandong Hanming has a smooth inner wall and will not cause damage to the cable skin when it is laid (no bolt connection is required). The third type of fault: only one phase of the polymer cable tray Open circuit, current relay action, damage at the fault point is lighter but the exposure is more obvious. It may be that the phase current is too large or caused by the quality of the cable. In this case, the high-molecular polymer cable tray produced by Shandong Hanming is applied. The double-layer hollow structure designed according to the mechanical principle can effectively block heat and prevent heat transfer to the cable, and protect the cable skin from overheating.     The fourth type of fault: the internal short circuit of the cable, the appearance does not see traces, such faults are generally caused by the quality of the cable is relatively rare. In this case, it is recommended to replace the high-quality cable with the high-molecular polymer cable tray produced by Shandong Hanming, which is safer and more reliable.
    The polymer cable tray is organically blended with special polymer materials and other characteristic plastic additives according to the requirements of international standards, so that it has engineering polymer materials conforming to various application places. The product has flame retardant, acid and alkali resistant oxidation and good physical and chemical properties, and is the first choice in future construction engineering applications.