ABB Relion 670 Series Applications Manual page 394

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Table of Contents

QB7OPTR (bay 1)

QB7OPTR (bay n)

VPQB7TR (bay 1)

VPQB7TR (bay n)

EXDU_BB (bay 1)

EXDU_BB (bay n)

IEC04000510 V1 EN-US

Figure 198: 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

IEC04000511 V1 EN-US

Figure 199: Busbars divided by bus-section disconnectors (circuit breakers)

To derive the signals:

These signals from each double-breaker bay (DB_BUS) are needed:

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

All disconnectors of this part of the busbar are open.

The switch status of all disconnectors on this part of the busbar are valid.

No transmission error from any bay that contains the above information.

QB1 is open.

QB2 is open.

The switch status of QB1 is valid.

The switch status of QB2 is valid.

No transmission error from the bay that contains the above information.

en04000510.vsd

en04000511.vsd

1MRK 511 401-UEN Rev. K

M15053-83 v4

Bay control REC670

Application manual

Relion rec670