RestoreFreq
, the RESTORE output is issued after the time delay
tRestore
. The design
of underfrequency protection SAPTUF is schematically described in figure
Frequency
Comparator
f < StartFrequency
Voltage
START
START
TRIP
Comparator
MinValFreqMeas
BLOCK
Comparator
f > RestoreFreq
Block
OR
Time integrator
TimerOperation Mode
Selector
tDelay
tReset
tRestore
RESTORE
Start
&
Trip
Output
Logic
IEC05000726-2-en.vsdx
TRIP
BLKDMAGN
IEC05000726 V2 EN
Figure 264:
Simplified logic diagram for SAPTUF
10.2
Overfrequency protection SAPTOF
10.2.1
Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Overfrequency protection
SAPTOF
f >
SYMBOL-O V1 EN
81
Section 10
1MRK502052-UEN B
Frequency protection
548
Technical manual
Summary of Contents for Relion REG670
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