HAT553V ATS Controller User Manual Page 24 of 32
10.2.3
AUTO TRANS./NON RESTORE (INACTIVE FOR MUTUAL BACKUP)
When Auto Trans./Non Restore is set, and Mutual Backup is inactive, A power is master. If A power is
normal, and A power closes, when A power is abnormal, B power is normal, then A power opens, B
power closes; if A power recovers normal, then switch keeps at B power close status; when B power is
abnormal, B power opens; even through A power is normal, A power doesn't close.
Fig. 4 Auto Trans./Non Restore (Inactive for Mutual Backup) Flow Chart
NOTE
: Master power (A power) close needs to transfer to manual mode and by button operation close, otherwise in auto
mode, switch only transfers between open and backup power (B power) position.
10.2.4
NONE OPEN TRANSFER
When none open transfer is enabled, controller will not execute open operation. Detailed setting method:
in parameter setting interface, enter "switch setting" interface, find "None Open Transfer" Enable and set
it enabled. The following illustrates control logics by the example of "A power master", "A Mains B Gen".
A power is normal, A power closes; When A power is abnormal, B power is normal, controller issues B
power close order; switch directly transfers from A power loading to B power loading. A power open
steps in the middle are omitted.
