ABB DPT-CB010系列双电源自动转换开关；DPT160-CB010 R63 4P
双电源切换系统类产品发展大体经历了三类：接触器类、塑壳断路器类/负荷隔离开关类、一体式自动转换开关电器类。
There are three kinds of product development in dual power switching system: contactor, molded case circuit breaker, load isolating switch and integrated automatic switching device.
接触器类
contactors
此类电源切换系统以接触器为切换执行部件，切换功能用中间继电器或逻辑控制模块组成二次回路完成控制功能，一般为非标产品，缺点是主回路接触器工作需要二次回路长期通电，容易产生温升发热、触点粘结、线圈烧毁等故障。因为是非标产品，其组成元器件较多，产品质量受元器件、制造工艺制约，故障率较高，现已逐渐被新产品代替。
This kind of switching power supply system with contactor ute switching components, switching function with intermediate relay logic control module or the two loop control function for non-standard products, disadvantage is the main circuit contactor needs two circuit energized for a long time, easy to produce temperature fever, contact bonding, coil burning fault. Because it is a non-standard product, it has many components and components, and the quality of products is restricted by components and manufacturing processes. The failure rate is relatively high, and now it is gradually replaced by new products.
