Does the insulation resistance of the Cord Unshielded Patch Cord still meet the requirements after the constant damp heat test?

The constant damp heat test is a performance test used to evaluate the long-term use of electronic components and cables in high temperature and high humidity environments. Its purpose is to simulate the extreme environmental conditions that may be encountered in actual use to verify the stability and reliability of the product under these conditions. The test is usually carried out at (40±2)℃ and (85±5)%RH for 168 hours (7 days) or longer, depending on the product standards and test requirements.

The insulation resistance of the Cord Unshielded Patch Cord meets the requirements when it leaves the factory, and after 168 hours of constant damp heat test, its insulation resistance must still be maintained above 100MΩ. This requirement not only reflects the high standards of the product in the design stage, but also reflects its emphasis on electrical safety in actual applications.

Insulation resistance is a measure of the ability to prevent leakage current between a conductor and the ground or between conductors. The higher the value, the better the insulation performance, the smaller the leakage current, and the higher the electrical safety. 100MΩ is a common reference value used to evaluate whether the insulation performance of the cable meets basic safety standards. If the insulation resistance drops below 100MΩ, it means that the insulation material may have lost some of its insulation ability due to moisture, aging or material degradation, and there is a risk of leakage.

In the constant damp heat test, high temperature and high humidity environment will have a significant impact on the insulation material. First, hygroscopicity is one of the main issues. High humidity causes the insulation material to absorb moisture, thereby reducing its insulation performance. The penetration of moisture will weaken the insulation resistance of the material and increase the risk of leakage current, which in turn affects the safety and stability of the electrical system. Secondly, material aging is particularly obvious in high temperature environments.

High temperature will accelerate the chemical and physical aging process of the insulation material, resulting in a decrease in its mechanical properties and elasticity, and may cause damage to the material structure, thereby reducing its long-term performance. Finally, increased conductivity is also an impact that cannot be ignored. When the insulation material absorbs moisture, a conductive path may be formed inside it, resulting in a significant increase in leakage current, and may even cause a short circuit or equipment failure. These effects work together to make the insulation material more susceptible to performance degradation in high temperature and high humidity environments, so the constant damp heat test is a key test method to evaluate its long-term reliability.

Therefore, the purpose of this test is to verify the stability of the insulating material in long-term use and ensure that it can maintain good insulation performance in harsh environments.

During the design and manufacturing process of this product, the impact of high temperature and high humidity environment on insulation performance has been considered. Passing relevant tests shows that its insulating material has good moisture resistance and heat resistance. In actual applications, even in high temperature and high humidity environments, the jumper can still maintain good electrical performance, ensuring the safety and stability of signal transmission.