Necessity of cable intermediate joints in power transportation

Due to the limited manufacturing length of power cables, a complete power line can only be formed by connecting each power cable to ensure the normal transportation of power, and the insulation performance and core connection effect of the connection between the cable and the cable should not be lower than the cable itself. This tool for connecting power cables is called a power cable joint.

The cable intermediate connection is the part that connects the cable with the cable or equipment, that is, the cable intermediate joint. Short circuit faults caused by animals allow safe and reliable operation of circuits.

The cable terminal and the cable intermediate joint are collectively referred to as cable accessories. The cable accessories should be able to operate safely for a long time like the cable body, and have the same service life as the cable. A good cable accessory should have the following properties:

1. The wire core is well connected: the main reason is that the connection resistance is small and the connection is stable, can withstand the impact of the current, and the contact resistance after long-term operation is not greater than 1.2 times the resistance of the same length of the cable core body, and it should also have a certain mechanical strength , Vibration and corrosion resistance.

2. Good insulation performance: The insulation performance of the cable accessories should not be lower than the cable body, the dielectric loss of the insulating material used should be low, and the structure should be able to deal with the sudden change of the electric field in the cable accessories. There are measures to change the distribution of the electric field.

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