YCQR-63 Automatic Transfer Switch The YCQR-63 automatic transfer switch is a two-station switching device commonly used for I and standby for II, suitable for AC systems with 50-60Hz and rated current of 6A-63A. The main function of this switch is to automatically switch to backup power II in case of main power failure common power supply I to ensure continuity of supply with switching speed less than 50 milliseconds, effectively solving problems caused by power outages. More info about our prod