ABB RELION REX640 Technical Manual page 1462

Section 9
Control functions
1456
Table 1387: Settings of ASCGAPC of SCB3 for given example
Settings
ASC CB Num1
Number of sources
Number of NonSrc CB
The subnetwork numbers of eight power sources are available in monitored data
SBNW_SRC1...SBNW_SRC8. The subnetwork numbers of NSCBs are available in
monitored data SBNW_NSCB1...SBNW_NSCB17. The subnetwork numbers of
busbars are available in monitored data SBNW_BB1...SBNW_BB15.
The monitored data SRC1_GRI_CON...SRC8_GRI_CON give the grid connection
status of source 1...source 8. In
grid, so the monitored data SRC2_GRID_NW is TRUE. Also, zero subnetwork
number is assigned to all the open CBs. Hence SCB 1 and NSCB3 are assigned zero
as subnetwork number.
The CB status is assumed uncertain in abnormal conditions (communication failure,
bad quality of the data received from any ASGCSYN or ASNSCSYN) or when the CB
status inhibit input is received via SRC1_ASC_DAT...SRC8_ASC_DAT or
NS1_ASC_DAT...NS17_ASC_DAT signal. When the status of the CB is uncertain,
the group including this CB or the groups connected across this CB are assigned zero
as the subnetwork number. For example, if the SCB1 status is uncertain, then source
1, source 3, SCB1, SCB3, NSCB4, Bus 3 and Bus 4 are assigned zero as subnetwork
number.
All subnetwork numbers are displayed as zero when ASC CB Num1 =
"Sourcex", x= 1...8.
Coordinator
Three instances of ASNSCSYN can be configured for the synchronization of three
NSCBs. The CB number can be set using settings ASC CB Num1, ASC CB Num2 and
ASC CB Num3. The function allows only NSCBs to be synchronized at a time. If
synchronization is initiated for one of the three breakers, Coordinator sends the
synchronized status to all the sources via ASC_SRC1_DAT...ASC_SRC8_DAT
signal and to all the non-sources via ASC_NS_DAT signal. The rest of the operation
is explained in Figure 783.
Suggested values
Source CB 3
3
4
Figure 782, source 2 is electrically connected to the
1MRS759142 C
Description
ASC1 host circuit breaker
number 3
Total number of sources present
in system
Number of bus coupler or grid
transformer CB in the system
REX640
Technical Manual