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HAT552/HAT553 DUAL POWER ATS CONTROLLER USER MANUAL
HAT552/HAT553 ATS Controller 2020-05-14 Version 1.1 Page 23 of 35
11.2.1
AUTO TRANS./RESTORE
When Auto Trans./Restore is set, A power is master; if A power is normal, then A power closes; if A
power is abnormal, B power is normal, then A power opens, B power closes; if A power recovers normal,
then B power opens, A power closes.
Fig. 3 Auto Trans./Restore Flow Chart