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
Figure 886
, source 2 is electrically connected to the grid,
so the monitored data SRC2_GRI_CON 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.
9.8.4.2 Coordinator
Three instances of ASNSCSYN can be configured for the synchronization of three
NSCBs in a single relay. 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 887
.
Control functions
1MRS759142 F
1614 REX640
Technical Manual
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