ABB RELION RET670 User Manual

For a busbar grounding switch on bypass busbar C, these conditions are valid:
789OPTR (bay 1)
BB_DC_OP
VP_BB_DC
EXDU_BB
en04000510_ansi.vsd
AND
AND
AND
789OPTR (bay n)
. . .
. . .
. . .
VP789TR (bay 1)
VP789TR (bay n)
EXDU_BB (bay 1)
EXDU_BB (bay n)
. . .
. . .
. . .
. . .
. . .
. . .
ANSI04000510 V1 EN-US
Figure 357: Signals from bypass busbar to busbar grounding switch
15.3.7.3 Signals in double-breaker arrangement
M15053-83 v4
The busbar grounding switch is only allowed to operate if all disconnectors of the bus
section are open.
en04000511_ansi.vsd
Section 1
Section 2
A1A2_DC(BS)
B1B2_DC(BS)
BB_ESBB_ES
DB_BUS
(WA1)A1
(WA2)B1 B2
A2
DB_BUS
ANSI04000511 V1 EN-US
Figure 358: Busbars divided by bus-section disconnectors (circuit breakers)
To derive the signals:
Signal
BB_DC_OP All disconnectors of this part of the busbar are open.
VP_BB_DC The switch status of all disconnectors on this part of the busbar are valid.
EXDU_BB No transmission error from any bay that contains the above information.
These signals from each double-breaker bay (DB_BUS) are needed:
1MRK 504 163-UUS A Section 15
Control
Transformer protection RET670 2.2 ANSI 749
Application manual

ABB RELION RET670 Specifications

General

Brand	ABB
Model	RELION RET670
Category	Protection Device
Language	English