1. Eddy current problems caused by high current power lines

In the construction of power cables, some use steel brackets, some use steel protection tubes,  some use cable clamps  overhead laying. The steel (iron) closed loop around the power cable may form eddy currents. Eddy currents are greater especially in high current power cable systems. During the construction of power cables, measures must be taken to prevent the formation of steel (iron) closed loops around the cables to prevent the occurrence of eddy currents caused by the cables. Guangxi wire  cable

2. The problem of mechanical damage caused by the rotation of the power cord

Due to the large outer diameter of the power cable, it is difficult to transport  lay,  the requirements for the turning radius of the power cable are also relatively strict. During the construction of the power cable, if the turning angle is too large, it may cause mechanical damage to the inside of the conductor,  the mechanical damage is caused by the reduction of the insulation strength of the cable until failure occurs. The cable head was found to be faulty during construction. When making cable heads, all three cable heads are the same length. When connecting with the equipment, due to the limitation of the terrain, the middle phase cable head is too long  becomes an arch,  the root of the cable head is damaged  discharged. Then take measures to appropriately shorten the connection length of the middle-phase cable head in the equipment connection, so that the three-phase cable head is  affected by external force,  practice has proved that the operation effect is good. It can be seen that in the process of cable construction, the torque on the cable should be reduced as much as possible. When turning the cable  away  the cable, allow the cable to bend naturally to prevent internal mechanical damage.Guangxi cable

3. It is the moisture-proof problem of the power cord

Operational experience shows that the faults of medium  low voltage power cables are mostly the faults of the intermediate joints  terminal heads of the cables, while the faults of the intermediate joints  terminal heads are mostly caused by poor sealing  moisture intrusion, which will lead to a decrease in dielectric strength. The network mostly adopts the dendritic power supply mode,  the number of cable terminals is large. Therefore, sealing the cable end  the intermediate joint is one of the important measures to ensure the safe  reliable operation of the cable.

4. It is the grounding problem of medium  low voltage power cables

In the public medium  low voltage power cable network, since the three-phase loads are  equal, if the metal sheathed cable is used, the grounding problem of the metal sheath must be considered,  the grounding problem of the metal sheath must be considered. Take into account that the non-grounding point of the metal sheath must be guaranteed. The normal induced voltage should  be greater than 100V. We believe that in the medium  low voltage cable network, grounding electrodes (nets) should be set at all cable joints,  the metal sheath should be reliably grounded. Guangxi cable manufacturers

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