The reasons for the reduction of automobile cable insulation are as follows:
1. External damage
From the analysis of operation in recent years, especially in the rapid economic development of today, a considerable number of automobile cable failures are caused by mechanical damage.
2. Insulation damp
This situation is also very common, generally in the buried or row in the car cable joints. For example: car cable joint production is not qualified and in humid climate conditions to do joint, will make the joint water or mixed with water vapor, for a long time under the action of the electric field to form water branches, gradually damage the insulation strength of the car cable and cause failure.
3. Chemical corrosion
Automobile cable directly buried in the area of acid and alkali action, often cause automobile cable armor, lead skin or outer protective layer is corroded, protective layer due to long-term chemical corrosion or electrolytic corrosion, resulting in protective layer failure, insulation reduction, will also lead to automobile cable failure.
4. The connector is faulty
Automobile cable joints are the weakest links in automobile cable lines, and faults caused by direct personnel faults (bad construction) often occur. In the process of making automobile cable joints, if the joints are not pressed tightly, insufficient heating and other reasons, the insulation of automobile cable ends will be reduced, resulting in accidents.
5. Long-term overload operation
Overload operation, due to the thermal effect of current, load current through the automobile cable will inevitably lead to conductor heating, at the same time, the skin effect of charge and steel armor eddy current loss, dielectric loss will also produce additional heat, so as to increase the temperature of automobile cable. Long-term overload operation, high temperature will accelerate the aging of insulation, resulting in insulation breakdown. Especially in the hot summer, the temperature rise of the automobile cable often leads to the weak insulation of the automobile cable is the first to be broken down, so in the summer, the fault of the automobile cable is particularly many.
6. Environment and temperature
The external environment and heat source of automobile cables may also cause excessive temperature, insulation breakdown, or explosion and fire of automobile cables.
News
2023-03-21
What are the reasons for the decrease in insulation of automobile cables?
