4PRO ATS-250A-4P-iRC Automatic Transfer Changeover Switch 250A 120/208V 50Hz 60Hz

- 3 working positions: main power ON - backup power OFF; main power OFF - backup power ON; main and backup power OFF; - double complex contacts/ horizontal pulling mechanism/micro motor energy pre-storage and microcomputer control technology; - reliable mechanical interlock and electric interlock; - "Zero Position" technology. Device can be set to Zero Position under emergency situations with two way power supply cut off meeting the fire linkage requirements; - singleness motor drive providing smooth, reliable, low noise operation;