Abstract: Abstract: In this study, the noise reduction measures of outdoor substation (converter station) are mainly noise insulation cover and barrier. The main components of the above measures are carbon steel, glass cotton and rock wool. The electric fire is mainly composed of insulating oil and polymer combustion,and the heating rate and maximum temperature are higher than the standard fire, which has more severe influence on the material.Electric fire, mineral cotton materials will occur heat shrinkage,powdering, basically no impact on fire, but steel structure and galvanized steel plate even at 1 000 ℃ still have strength, although softening deformation, but will not break, still hinder the fire work. "High-temperature melt-down granular plate" and "High- temperature melt-down structure based on thermoplastic PA6 material" improved the fire protection conditions, and its final time service performance needs to be further accumulated in the application of test data. Low noise of transformer equipment will be the final trend of the development of electrical equipment technology.

Key words: noise redaction material BOX- In acoustic shield, electric fire, high temperature failure, performance of materials