ABB RELION REX640 Technical Manual page 1446

Section 9
Control functions
1440
Maximum Syn time has elapsed. In this automatic mode the closing signal CLOSE_CB
is activated automatically once all the closing conditions are satisfied.
If the closing conditions are fulfilled during a permitted check time set with Maximum
Syn time, ASNSCSYN gives synchro check permission to Circuit-breaker control
CBXCBR after the closing command signal is delivered. The simplified configuration
block diagram of ASNSCSYN with CLOSE_CB to CBXCBR is as shown in
772.
ASNSCSYN
CLOSE_CB
SYNC_OK
GUID-382A534F-984B-419C-AAD3-B1C935DB1FB1 V1 EN
Figure 772: Simplified configuration block diagram of ASNSCSYN in auto
synchronization mode operation
Alarms generation
In auto synchronization control mode, the closing command generation is activated by
either command input CL_COMMAND or by command parameter Synchronize CB.
After the closing command activation, if the conditions for closing CB are not fulfilled
within the set time of Maximum Syn time, a failed closing attempt alarm is given. The
CL_FAIL_AL alarm output signal is pulse-shaped and the pulse length is 500 ms.
CL_COMMAND or
Synchronize CB
CLOSE_CB
CL_FAIL_AL
GUID-6E8DD9A0-EA4F-4915-B617-EA724AA29280 V1 EN
Figure 773: Determination of checking time for closing
CBXCBR
AU_CLOSE
EXE_CL
SYNC_OK
t = Maximum Syn time
1MRS759142 C
Figure
I
t = 500 ms
REX640
Technical Manual