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ANSI16000040-1-en.vsdx
RESTORE
Voltage
pickup
PICKUP
TRIP
block
If
[StartFreqGrad<0
AND
df/dt < StartFreqGrad]
OR
[StartFreqGrad>0
AND
df/dt > StartFreqGrad]
Then
PICKUP
V < IntBlockLevel
BLKDMAGN
Rate-of-change
of Frequency
BLOCK
OR
BLKREST
>
f > RestoreFreq
tRestore
restore
AND
BLKTRIP
trip
AND
pickup
Pickup
&
Trip
output
logic
Definite timer
tReset
tDealy
Frequency
ANSI16000040 V1 EN-US
Figure 110:
Simplified logic diagram for SAPFRC (81)
1MRK 511 408-UUS A
Section 10
Frequency protection
Phasor measurement unit RES670 2.2 ANSI
317
Technical manual
Summary of Contents for Relion RES670
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