ABB DPT-CB010系列双电源自动转换开关；DPT63-CB010 C25 3P
PC级的是电磁驱动，切换迅速（120毫秒-250毫秒），具有灭弧室，体积小是一款真正双电源开关，价格更低一点，适合切换时间要求不是很高。
PC level is the electromagnetic drive, switching quickly (120 milliseconds -250 milliseconds), with the arc chamber, small size is a real double power switch, lower price, suitable for switching time requirements are not very high.
CB级的是由两个断路器、电动机、机械连锁组成，切换时间1000毫秒-2500毫秒，安全没有保障，但价格低廉。
The CB level is made up of two circuit breakers, motors and mechanical chains. The switching time is 1000 milliseconds -2500 milliseconds. The safety is not guaranteed, but the price is low.
PC级采用一体式转换结构，励磁驱动，简单可靠，动作时间快，一般MS。触头为银合金，触头分离速度大，有专门设计的灭弧室。体积小，CB级的1/2.具有耐短时电流。
The PC level adopts an integrated conversion structure, which is excitation driven, simple and reliable, and has a fast action time and a general MS. The contact is silver alloy, and the contact separation speed is large, specially designed arc extinguishing chamber. Small volume, CB level 1/2. has short time current resistance.
CB级是由两台断路器为基础，由控制器控制带有机械连锁的电动传动机构来实现2路电源的自动转换。
The CB level is based on two circuit breakers. It controls the automatic transmission of the 2 power supply by the controller.