ABB RELION RET670, Applications Manual

Page: 756 / 1016

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_DB No transmission error from the bay that contains the above information.
These signals from each bus-section disconnector bay (A1A2_DC) are also 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
disconnectors 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.
The logic is identical to the double busbar configuration described in section “Signals
in single breaker arrangement”.
15.3.7.4 Signals in breaker and a half arrangement
M15053-123 v4
The busbar grounding switch is only allowed to operate if all disconnectors of the bus-
section are open.
en04000512_ansi.vsd
Section 1 Section 2
A1A2_DC(BS)
B1B2_DC(BS)
BB_ES BB_ES
BH_LINE
(WA1)A1
(WA2)B1
B2
A2
BH_LINE
ANSI04000512 V1 EN-US
Figure 359: Busbars divided by bus-section disconnectors (circuit breakers)
The project-specific logic are the same as for the logic for the double busbar
configuration described in section “Signals in single breaker arrangement”.
Signal
BB_DC_OP All disconnectors on this part of the busbar are open.
VP_BB_DC The switch status of all disconnectors on this part of the busbar is valid.
EXDU_BB No transmission error from any bay that contains the above information.
Section 15
1MRK 504 163-UUS A
Control
750 Transformer protection RET670 2.2 ANSI
Application manual