Into the 21st century, with the civil engineering technology to development, people build a large number of various types of reinforced concrete buildings and structures. In these reinforced concrete structures, structural cracks, the quality is a very common problem, a serious impact to the project has been the use and safety is a need to explore and resolve technical problems. In recent years, despite the cracks caused the industry's attention, but have not yet been solved.
低压备自投(Backup Automatic Transfer Switch)主要用于在主电源发生故障时,自动切换至备用电源,以确保用电设备的持续供电。其工作原理是根据正常电源故障后,母线失压,电源无流的特征,以及备用电源有电的情况下,自动投入备用电源。备自投根据电压等级和配电结构的不同,具体的逻辑也有所不同。