Important indicators for testing the quality of wire and cable（二）
Sitong cable quality first, customer supreme principle invite you to pay attention to todays new information. 4. Insulation strength test: The insulation strength of wire and cable refers to the ability of the insulation structure and the insulation material to withstand the electric field without breakdown damage. In order to check the quality of the wire and cable products and ensure the safe operation of the products, all insulation type wires and cables are generally tested for insulation st
Sitong cable "quality first, customer supreme principle” invite you to pay attention to today's new information.
4. Insulation strength test:
The insulation strength of wire and cable refers to the ability of the insulation structure and the insulation material to withstand the electric field without breakdown damage. In order to check the quality of the wire and cable products and ensure the safe operation of the products, all insulation type wires and cables are generally tested for insulation strength. . The dielectric strength test can be divided into a withstand voltage test and a breakdown test. The voltage of time is generally higher than the rated working voltage of the sample, the specific voltage value and the withstand voltage time, which are specified in the product standard. Through the withstand voltage test, the reliability of the product operating under the working voltage can be tested and the seriousness of the insulation can be found. Defects, but also some shortcomings of the production process.
5. Aging and stability test:
The aging test is a stability test that maintains stable performance under the action of stress (mechanical, electrical, and thermal). Heat aging test: A simple heat aging test is a test of the aging characteristics of a test product under the action of heat. The test sample is placed in an environment above a certain temperature of the rated working temperature, so that at a higher temperature T, Shorter life.
6. Thermal stability test:
The thermal stability test is that the cable is heated by the current while still receiving a certain voltage. After a certain period of heating, some sensitive performance parameters are measured to evaluate the stability of the insulation. The insulation stability test is divided into two types: long-term stability test or short-term accelerated aging test.
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