Electrical engineering; basic environmental testing procedures; guidance to test Kc: sulphur dioxide SO<(Index)2> (high concentration) for electrical contacts and connections; indentical with IEC 68-2-49, edition 1983

This standard addresses fundamental environmental testing procedures within the field of electrical engineering, specifically focusing on test Kc which outlines the guidelines for sulfur dioxide exposure. The document establishes a methodological framework for evaluating the resistance of electrical contacts and connecting components to corrosive effects induced by sulfur dioxide gas. It defines the conditions under which such tests should be conducted, including the concentration of the gas, the duration of exposure, and the temperature and humidity levels required to simulate specific environmental stress. The procedure aims to assess the durability and reliability of electrical connections in environments where sulfur dioxide is present, providing a basis for comparing material performance and design robustness. By following the specified protocol, engineers can determine the suitability of components for application in areas with potential atmospheric contamination from sulfur dioxide. The guidance included ensures consistency in testing approaches across different laboratories and manufacturing settings, facilitating uniform evaluation of product quality and operational safety under defined corrosive conditions.