The difference between the automatic conversion of dual power supply

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.
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.
The PC level adopts integral conversion structure, excitation drive, simple and reliable, fast action time and general 100-200MS. The contact is silver alloy, the contact separation speed is large, and specially designed arc extinguishing chamber. Small volume, CB level 1/2. has short time current resistance.
The CB level is based on two circuit breakers, and is controlled by the controller to realize the automatic conversion of the 2 power supply with the mechanical linkage electric drive mechanism.