ABB RELION REX640, Technical Manual, Page: 1610 / 1960

The general busbar arrangement across any NSCB is shown in
Figure 884
. For each
NSCB, the numbers for Bus A1, Bus A2, Bus B1 and Bus B2 must be set. These bus
numbers for non-source CB 1 are set in
NonSrc1 bus A1 Num, NonSrc1 bus A2 Num,
NonSrc1 bus B1 Num and NonSrc1 bus B2 Num, respectively. Each of these settings
can be set to values "Bus 1"..."Bus 15" or to "Not Configured".
Bus A2
Non Source CB
Bus A1
Bus A2
Non Source CB
Bus B2
Bus A1
Bus B1
Single busbar arrangement Double busbar arrangement
ISO A1 ISO B1
ISO A2
ISO B2
ISO A1
ISO A2
Figure 884: Different busbar arrangement across any non-source CB
The general busbar arrangement across any SCB is shown in
Figure 885
. For each
source CB, the Bus A and Bus B numbers are to be set. These bus numbers for
source CB 1 are set in
Src1 bus A Num and Src1 bus B Num, respectively. Each of
these settings can be set to values "Bus 1"..."Bus 15" or to "Not Configured".
Bus A
Source CB
Bus B
Source
Bus A
Source CB
Single busbar arrangement Double busbar arrangement
ISO A ISO B
ISO A
Source
Figure 885: Different busbar arrangement for any source CB
The subnetwork group identification is based on the set busbar arrangement
across each CB and the connection status input received from the corresponding
Control functions 1MRS759142 F
1610 REX640
Technical Manual