Signals From Bus-Coupler - ABB RELION RET670 Applications Manual

Section 15
Control
15.3.2.3
720
These signals from each line bay (ABC_LINE, 3) except that of the own bay are
needed:
Signal
789OPTR 789 is open
VP789TR The switch status for 789 is valid.
EXDU_BPB No transmission error from the bay that contains the above information.
For bay n, these conditions are valid:
789OPTR (bay 1)
789OPTR (bay 2)
. . .
. . .
789OPTR (bay n-1)
VP789TR (bay 1)
VP789TR (bay 2)
. . .
. . .
VP789TR (bay n-1)
EXDU_BPB (bay 1)
EXDU_BPB (bay 2)
. . .
. . .
EXDU_BPB (bay n-1)
ANSI04000477 V1 EN-US
Figure 324: Signals from bypass busbar in line bay n

Signals from bus-coupler

If the busbar is divided by bus-section disconnectors into bus sections, the busbar-
busbar connection could exist via the bus-section disconnector and bus-coupler within
the other bus section.
BB7_D_OP
AND
VP_BB7_D
AND
EXDU_BPB
AND
en04000477_ansi.vsd
Transformer protection RET670 2.2 ANSI
1MRK 504 163-UUS A
M13560-31 v4
Application manual