AND
AND
OR
OR
VL1FF
VL1OK
VB1FF
VB1OK
VB2FF
VB2OK
BUS1_CL
BUS1_OP
LINE1_CL
LINE1_OP
selectedFuseOK
BLOCK
line1Voltage
L1SEL
AND
AND
VSELFAIL
VL2FF
VL2OK
OR
AND
AND
AND
AND
AND
B1SEL
bus1Voltage
busVoltage
AND
AND
AND
BUS2_CL
BUS2_OP
LINE2_CL
LINE2_OP
bus2Voltage
L2SEL
AND
AND
B2SEL
line2Voltage
lineVoltage
invalidSelection
OR
en05000781_ansi.vsd
OR
OR
NOT
NOT
ANSI05000781 V1 EN
Figure 313:
Simplified logic diagram for the voltage selection function for the tie circuit breaker in breaker-and-a-
half arrangement.
Fuse failure supervision
External fuse failure signals or signals from a tripped fuse switch/MCB are connected
to binary inputs that are configured to the inputs of SESRSYN (25) function in the
IED. Alternatively, the internal signals from fuse failure supervision can be used when
available. There are two alternative connection possibilities. Inputs labelled OK must
be connected if the available contact indicates that the voltage circuit is healthy. Inputs
1MRK505222-UUS C
Section 12
Control
625
Technical reference manual
Содержание Relion 670 series
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