QB2OPTR(QB220OTR) (bay 1/sect.B2)
BB_DC_OP
VP_BB_DC
EXDU_BB
en04000509.vsd
QB2OPTR(QB220OTR) (bay n/sect.B2)
. . .
. . .
. . .
VPQB2TR(VQB220TR) (bay 1/sect.B2)
VPQB2TR(VQB220TR) (bay n/sect.B2)
VPDCTR (B1/B2)
EXDU_BB (bay n/sect.B2)
. . .
. . .
. . .
. . .
. . .
. . .
&
&
&
DCOPTR (B1/B2)
EXDU_BB (bay 1/sect.B2)
EXDU_DC (B1/B2)
IEC04000509 V1 EN-US
Figure 355: 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)
BB_DC_OP
VP_BB_DC
EXDU_BB
en04000510.vsd
&
&
&
QB7OPTR (bay n)
. . .
. . .
. . .
VPQB7TR (bay 1)
VPQB7TR (bay n)
EXDU_BB (bay 1)
EXDU_BB (bay n)
. . .
. . .
. . .
. . .
. . .
. . .
IEC04000510 V1 EN-US
Figure 356: Signals from bypass busbar to busbar earthing switch
15.4.7.3 Signals in double-breaker arrangement
M15053-83 v4
The busbar earthing switch is only allowed to operate if all disconnectors of the bus
section are open.
Section 15 1MRK 506 369-UEN B
Control
686 Line distance protection REL670 2.2 IEC
Application manual
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