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There are many types of low-voltage electrical components, such as relays, circuit breakers and contactors. Low-voltage complete sets of equipment such as power distribution boxes, power boxes and energy metering boxes, etc., household and similar electrical appliances and industrial electrical appliances, and the assessment of damp heat. The test can be summarized into two types: constant damp heat test and alternating damp heat test. The following explains the application and reasons of the constant damp heat test chamber in the low-voltage electrical industry:
For samples where moisture is primarily due to adsorption, absorption, and diffusion, a constant damp heat chamber test is used to assess whether the dielectric material retains the desired electrical properties in humid atmospheric conditions. It is used to evaluate the environment of pollution level 2. The general use of this type of environment is only non-conductive pollution. Occasionally, due to condensation, it is short-lived. Because the condensation in the environment is not very large, the constant damp heat test is used. That is, a constant damp heat test chamber. Household and similar electrical appliances are generally used in pollution level 2 environments, as these standards for electrical assessments use a constant damp heat test.
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