Scopo:
The dielectric breakdown voltage tester for solid insulating materials is mainly suitable for solid insulating materials such as wire sleeves, resins and glues, impregnated fiber products, mica and its products, plastic films, ceramics, glass, insulating paint, vulcanized rubber, cable paper, insulation For insulating media such as paint film, hard rubber, cardboard, etc., in air or liquid medium, measure the breakdown strength and withstand voltage time under power frequency (48~62Hz) or corresponding DC voltage. The power frequency dielectric breakdown strength tester for rubber and plastics is suitable for continuous and uniform boosting or step-by-step boosting. Apply AC/or DC voltage to the sample until breakdown, measure the breakdown voltage value, and calculate the sample. The breakdown strength; using the method of rapid boosting, the voltage is raised to the specified value, and the sample does not break down for a certain period of time, and the specified value at this time is the withstand voltage value of the sample.
Principio di prova:
1. The breakdown and withstand voltage test is to apply a certain voltage to the tested product and keep it for a certain period of time to consider the performance of the tested product's insulation to withstand various voltages. Although many insulation defects can be found in insulation resistance and absorption ratio test, leakage current and DC withstand voltage test, and dielectric loss angle measurement test, but because the test voltage is lower than the working voltage of the tested product, some insulation defects cannot be solved in time. It was found that in order to further expose equipment defects, check the insulation level of electrical equipment and ensure that it can be put into operation, it is necessary to conduct AC breakdown and withstand voltage tests.
2. È un metodo efficace e diretto per identificare la resistenza isolante delle apparecchiature elettriche ed è di importanza decisiva per giudicare se il materiale elettrico può essere messo in funzione. La tensione, la forma d'onda, la frequenza e la distribuzione della tensione all'interno dell'isolamento dell'oggetto testato sono in linea con le effettive condizioni operative. Pertanto, il test di rottura e tensione di resistenza CA / CC può trovare efficacemente i difetti più pericolosi e concentrati nelle apparecchiature elettriche. . Maggiore è la tensione di prova, maggiore è l'efficacia di trovare difetti di isolamento
