ABB Relion 670 Series Applications Manual page 335

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1MRK 511 401-UUS F

double busbar arrangement without transfer busbar or a single busbar arrangement with/without

transfer busbar.

ANSI04000478 V1 EN-US

Figure 135: Switchyard layout ABC_LINE (3)

The signals from other bays connected to the module ABC_LINE (3) are described below.

Signals from bypass busbar

To derive the signals:

These signals from each line bay (ABC_LINE, 3) except that of the own bay are needed:

For bay n, these conditions are valid:

Bay control REC670

Application manual

en04000478_ansi.vsd

All line disconnectors on bypass WA7 except in the own bay are open.

The switch status of disconnectors on bypass busbar WA7 are valid.

No transmission error from any bay containing disconnectors on bypass

The switch status for 789 is valid.

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