Abstract
In dealing with electrical fire cases, it is necessary to trace the quality of various electrical products running on the line. It is a very effective and direct way to test the electrical life of the samples of the same specifications and models. The research of electrical life test characteristics can reflect the structural problems, movement performance and other characteristics of the product, which provides a basis for understanding the working state of the product and analyzing the failure reasons. In this paper, a kind of small shell type special contactor commonly used in low-voltage distribution system is taken as the research object, and the variation trend of characteristic parameters such as arcing time, arcing energy and opening phase angle with the operation times of electrical life test is analyzed. Through the establishment of key characteristic quantity database of electrical life, we can better analyze the product performance and grasp the operation status, and provide strong data support for the traceability work caused by its quality problems in electrical fire cases.
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