Signals In Double-Breaker Arrangement - ABB REG670 Applications Manual

1MRK 502 071-UEN -
15.3.7.3
Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062
Application manual
QB2OPTR(QB220OTR) (bay 1/sect.B2)
QB2OPTR(QB220OTR) (bay n/sect.B2)
DCOPTR (B1/B2)
VPQB2TR(VQB220TR) (bay 1/sect.B2)
VPQB2TR(VQB220TR) (bay n/sect.B2)
VPDCTR (B1/B2)
EXDU_BB (bay 1/sect.B2)
EXDU_BB (bay n/sect.B2)
EXDU_DC (B1/B2)
IEC04000509 V1 EN
Figure 275: Signals from any bays in section B2 to a busbar earthing switch in the
same section
For a busbar earthing switch on bypass busbar C, these conditions are valid:
QB7OPTR (bay 1)
. . .
. . .
. . .
QB7OPTR (bay n)
VPQB7TR (bay 1)
. . .
. . .
. . .
VPQB7TR (bay n)
EXDU_BB (bay 1)
. . .
. . .
. . .
EXDU_BB (bay n)
IEC04000510 V1 EN
Figure 276: Signals from bypass busbar to busbar earthing switch

Signals in double-breaker arrangement

The busbar earthing switch is only allowed to operate if all disconnectors of the bus
section are open.
. . .
. . .
. . .
. . .
. . .
. . .
. . .
. . .
. . .
&
&
&
Section 15
Control
BB_DC_OP
&
VP_BB_DC
&
EXDU_BB
&
en04000509.vsd
BB_DC_OP
VP_BB_DC
EXDU_BB
en04000510.vsd
543