ABB RELION RET670, Applications Manual

Page: 733 / 1016

The following signals from each bus-section disconnector bay (A1A2_DC) are needed.
For B1B2_DC, corresponding signals from busbar B are used. The same type of
module (A1A2_DC) is used for different busbars, that is, for both bus-section
disconnector A1A2_DC and B1B2_DC.
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 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),
have to 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
S1S2OPTR No bus-section coupler connection between bus-sections 1 and 2.
VPS1S2TR The switch status of bus-section coupler BS is valid.
EXDU_BS No transmission error from the bay that contains the above information.
For a bus-coupler bay in section 1, these conditions are valid:
en04000483_ansi.vsd
AND
VP_BBTR
EXDU_12
AND
BBTR_OP
OR
AND
BBTR_OP (sect.1)
DCOPTR (A1A2)
DCOPTR (B1B2)
BBTR_OP (sect.2)
VP_BBTR (sect.1)
VPDCTR (A1A2)
VPDCTR (B1B2)
VP_BBTR (sect.2)
EXDU_12 (sect.1)
EXDU_DC (B1B2)
EXDU_12 (sect.2)
EXDU_DC (A1A2)
ANSI04000483 V1 EN-US
Figure 330: Signals to a bus-coupler bay in section 1 from any bays in each section
For a bus-coupler bay in section 2, the same conditions as above are valid by changing
section 1 to section 2 and vice versa.
1MRK 504 163-UUS A
Section 15
Control
Transformer protection RET670 2.2 ANSI 727
Application manual