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ABB REG650 Technical Manual page 341

Generator protection

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1MRK 502 048-UEN A

LN1QOPEN

LN1QCLD

B1QOPEN

B1QCLD

LN2QOPEN

LN2QCLD

B2QOPEN

B2QCLD

UB1OK

UB1FF

UB2OK

UB2FF

ULN1OK

ULN1FF

ULN2OK

ULN2FF

BLOCK

IEC05000780 V2 EN

Figure 167:

Simplified logic diagram for the voltage selection function for a bus circuit breaker in a 1 1/2 breaker

arrangement

Technical manual

AND

AND

AND

AND

AND

AND

line2Voltage

bus2Voltage

OR

OR

OR

OR

OR

AND

line1Voltage

OR

AND

AND

AND

Section 12

Control

LN1SEL

LN2SEL

B2SEL

invalidSelection

lineVoltage

selectedFuseOK

AND

USELFAIL

AND

en05000780-2.vsd

335

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