ABB Relion 650 Series Technical Manual page 152

Bay control
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Section 8
Control
LN1QOPEN
LN1QCLD
B1QOPEN
B1QCLD
LN2QOPEN
LN2QCLD
B2QOPEN
B2QCLD
UB1OK
UB1FF
UB2OK
UB2FF
ULN1OK
ULN1FF
ULN2OK
ULN2FF
BLOCK
IEC05000780 V2 EN-US
Figure 60:
Simplified logic diagram for the voltage selection function for a bus circuit breaker in a 1 1/2
breaker arrangement
146
AND
AND
AND
AND
AND
AND
line2Voltage
bus2Voltage
OR
OR
OR
OR
OR
AND
line1Voltage
OR
AND
AND
AND
1MRK 511 424-UEN B
LN1SEL
LN2SEL
B2SEL
invalidSelection
lineVoltage
selectedFuseOK
AND
USELFAIL
AND
en05000780-2.vsd
Bay control REC650 2.2 IEC
Technical manual

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