HAT600P Series ATS Controller User Manual Page 42 of 58
14.3
SYNCHRONIZING CLOSE
Synchronizing close is transferring current power side to the other power supply under normal condition
of both S1 and S2. During this process synchronizing transfer is needed.
Parallel Mode
: When select parallel mode and the corresponding functions of input port, sync close
function is active, when select non-parallel mode, sync. close function cannot be executed.
Sync. Volt Difference
: Maximum volt difference between S1 and S2 at synchronization; if it is enabled,
volt difference won't be detected in synchronizing process.
Sync. Freq. Difference
: Maximum frequency difference between S1 and S2 at synchronization.
Sync. Phase Difference
: Maximum phase difference between S1 and S2 at synchronization. Usually
phase difference shall not be set too big. Otherwise, load impact will be too big at closing.
Fail To Sync Action
: Warning alarm or fault alarm can be set; after sync failure, it continues waiting for
sync until sync close is finished. For warning alarm when sync is completed or it exits from sync, alarm
shall be cleared; for fault alarm, it needs alarm reset key to clear the alarm.
Transfer On Sync Fail
: When this is enabled, after sync fails, non sync close will be conducted and no
sync failure alarm shall be issued.
Fail To Sync Delay
: Waiting time for sync; it shall issue sync failure alarm when it is overtime.
Breaker Feedback Time
: Pulse time for synchronizing close; at the time of synchronizing transfer, sync
close/open output delay starts; in the delay process if correct close status is detected, then stop the
close/open pulse output; if after delay is over, correct close status still cannot be detected, close/open
failure alarm shall be initiated.
Fig. 6 Sync Transfer Diagram
