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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

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)

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

Figure 276: Signals from bypass busbar to busbar earthing switch

15.3.7.3 Signals in double-breaker arrangement

The busbar earthing switch is only allowed to operate if all disconnectors of the bus

section are open.

1MRK 502 071-UEN - Section 15

Control

Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062 543

Application manual

ABB REG670 Applications Manual

Other manuals for ABB REG670