The insulation performance of the AAC cable is one of the important evaluation indicators for the quality of the cable.The so-called insulation is a safety measure that uses non-conductive materials to isolate or wrap charged objects to protect against electric shock. Good insulation is the most basic and reliable means to ensure the safe operation of electrical equipment and lines and prevent personal electric shock.
Insulation can generally be divided into three categories: gas insulation, liquid insulation and solid insulation. In practical applications, solid insulation is still the most widely used and most reliable insulating material.
Under the action of strong electricity, the insulating material may be broken down and lose its insulating performance. Among the above three insulating materials, after the gas insulating material is broken down, once the external factors (strong electric field) are removed, its inherent electrical insulation performance can be restored by itself; and the solid insulating material is irreversibly and completely lost after being broken down. Improve its electrical insulation properties. Therefore, the insulation selection of electrical circuits and equipment must match the voltage level, and must be compatible with the use environment and operating conditions to ensure the safety of insulation.
In addition, due to corrosive gas, vapor, moisture, conductive dust, and mechanical operation, the insulation performance of the insulating material may be reduced or even destroyed. Moreover, the long-term effects of environmental factors such as sunlight, wind and rain can also make insulating materials age and gradually lose their insulating properties.