Views: 0 Author: Site Editor Publish Time: 2023-03-17 Origin: Site
At present, DTL copper and aluminum cable lugs are mainly used in outdoor cable installation, and DTL copper and aluminum cable lugs are mainly used for failure. The main reasons for the fusing of DTL copper and aluminum cable lugs are as follows: 1. The quality does not meet the requirements of national standards. 2. The installation process is not precise. 3. Uneven load distribution. Next, I will explain it in detail.
Here is the content list:
What are the problems with the quality of DTL copper and aluminum cable lugs?
What problems will occur during the installation of DTL copper and aluminum cable lugs?
Why does the load distribution of DTL copper and aluminum cable lugs get uneven?
We took 8 commonly used DTL copper and aluminum cable lugs as an example to compare the relevant size indicators with national standards and found that the quality of the currently used DTL copper and aluminum cable lugs has the following problems: the screw holes are too large, which reduces the contact area of the DTL copper and aluminum cable lugs. The fixing bolts are easily loosened; the outer tube diameter of the DTL copper and aluminum cable lug becomes thinner, and the tube wall becomes thinner; the inner depth of the tube becomes shallower and the wire insertion part becomes shorter; the copper length of the copper-aluminum transition part is shortened; the width of the contact surface part is reduced, the contact area is reduced; the thickness of the contact surface is reduced.
During the installation process, whether the DTL copper and aluminum cable lug and the equipment clamp can be connected well is also one of the conditions to ensure a safe power supply. After the outdoor cable head DTL copper and aluminum cable lug fuse occurred, after careful inspection, it was found that the contact part of the lead clamp and the terminal had a melting point, which is also the second reason for poor contact.
In the process of power transmission, if the load of each phase of the DTL copper and aluminum cable lug is not uniform, the load of one or two phases will be below, and the load of the other phase or two will be high. The long-term excessive load current will increase the probability of cable line failure, accelerate the aging of the cable, shorten the service life of the cable, and cause the external contacts of the DTL copper and aluminum cable lug head to overheat and damage. The hazard of the load on the cable line is already obvious.
In addition to the above three reasons, lightning strikes and line faults in summer are also another reason for the fusion of the DTL copper and aluminum cable lugs of the cable outdoor cable head. Ease Industries & Investments Co., Ltd pays great attention to product quality. Welcome to choose our company.
