ABB RELION REX640, Техническое руководство, Страница: 1772 / 1960

Figure 939: Transfer mode overview
Running evaluation
The transfer in progress is indicated by
TR_RUNNING
output. If any of the transfer
mode(s) is/are in progress, the
TR_RUNNING
output is TRUE. This output remains
TRUE until reset by any of the following conditions:
• The
COMPL_FAST, COMPL_1ST_PH, COMPL_FBBM, COMPL_RES
or
COMPL_TDLY
output is TRUE
• The TR_RUNNING signal is active for more than Max Trn run time setting
NOT_IDLE
output is TRUE when transfer is running or when transfer wait timer is
running. Transfer wait time is set with
Transfer wait time setting. Transfer wait time
indicates minimum time between successive transfers.
All transfer mode(s) are reset if
TR_RUNNING
output changes from TRUE
to FALSE.
If transfer is not successful and transfer is interrupted, this is indicated with
TR_CANCEL
output.
The transfer modes are explained in next chapters.
Transfer sequence
Bus transfer follows always certain sequence presented in
Figure 940
. Simultaneous
fast transfer (if enabled) is attempted first. If disabled or not successful, next
step is sequential fast transfer (if enabled). If disabled or not successful, function
attempts to perform 1
st
phase transfer. If not successful, residual voltage transfer
is attempted. If not successful, function attempts to execute time delayed transfer
(if enabled). If all previous transfer attempts are unsuccessful, finally function allows
busbar to be decoupled.
Control functions 1MRS759142 F
1772 REX640
Technical Manual