ABB RELION RET670 Applications Manual page 752

Section 15
Control
746
Signal
DCOPTR The bus-section disconnector is open.
VPDCTR The switch status of bus-section disconnector DC is valid.
EXDU_DC No transmission error from the bay that contains the above information.
If no bus-section disconnector exists, the signal DCOPTR, VPDCTR and EXDU_DC
are set to 1 (TRUE).
If the busbar is divided by bus-section circuit breakers, the signals from the bus-section
coupler bay (A1A2_BS) rather than the bus-section disconnector bay (A1A2_DC)
must be used. For B1B2_BS, corresponding signals from busbar B are used. The same
type of module (A1A2_BS) is used for different busbars, that is, for both bus-section
circuit breakers A1A2_BS and B1B2_BS.
Signal
189OPTR 189 is open.
289OPTR 289 is open.
VP189TR The switch status of 189 is valid.
VP289TR The switch status of 289 is valid.
EXDU_BS No transmission error from the bay BS (bus-section coupler bay) that contains the
above information.
For a busbar grounding switch, these conditions from the A1 busbar section are valid:
189OPTR (bay 1/sect.A1)
. . .
. . .
. . .
189OPTR (bay n/sect.A1)
DCOPTR (A1/A2)
VP189TR (bay 1/sect.A1)
. . .
. . .
. . .
VP189TR (bay n/sect.A1)
VPDCTR (A1/A2)
EXDU_BB (bay 1/sect.A1)
. . .
. . .
. . .
EXDU_BB (bay n/sect.A1)
EXDU_DC (A1/A2)
ANSI04000506 V1 EN-US
Figure 353: Signals from any bays in section A1 to a busbar grounding switch in
the same section
For a busbar grounding switch, these conditions from the A2 busbar section are valid:
BB_DC_OP
AND
VP_BB_DC
AND
EXDU_BB
AND
en04000506_ansi.vsd
Transformer protection RET670 2.2 ANSI
1MRK 504 163-UUS A
Application manual