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HAT552/HAT553 DUAL POWER ATS CONTROLLER USER MANUAL
HAT552/HAT553 ATS Controller 2020-05-14 Version 1.1 Page 22 of 35
11 SWITCH OPERATION RUNNING
11.1 MANUAL OPERATION RUNNING
Press manual/auto transfer key
, and manual status indicator is illuminated; Controller is in manual
status (HAT553).
Press manual key
, and manual status indicator is illuminated; Controller is in manual status
(HAT552).
After the switch transfer key is pressed, switch transfers immediately; In the process of transferring, the
related indicator flashes; When the switch is transferred to the position, the related indicator is
illuminated always.
Table 21 Manual Transfer Key
Icon
Key Name
Function Description
A Power Close
Press and if load is in open status, A power closes, and load is
supplied by A power.
B Power Close
Press and if load is in open status, B power closes, and load is
supplied by B power.
Open Key
Press and load is disconnected (HAT553).
11.2 AUTO OPERATION RUNNING
Press manual/auto transfer key
, and auto status indicator is illuminated; Controller is in auto status
(HAT553).
Press auto key
, auto status indicator is illuminated; Controller is in auto status (HAT552).
In auto mode, controller will transfer switch based on the status of A power and B power, transfer priority
and auto trans./restore status to ensure supply for load. The following illustrates control logics by the
example of "A power master" and "A Mains B Gen".