Frequency
Comparator
f < PuFrequency
Voltage
PICKUP
PICKUP
TRIP
Comparator
V < IntBlockLevel
BLOCK
Comparator
f > RestoreFreq
Block
OR
Time integrator
TimerOperation Mode
Selector
TimeDlyOperate
TimeDlyReset
TimeDlyRestore
RESTORE
100 ms
Pickup
&
Trip
Output
Logic
en05000726_ansi.vsd
TRIP
BLKDMAGN
ANSI05000726 V1 EN
Figure 103:
Simplified logic diagram for SAPTUF (81)
10.2
Overfrequency protection SAPTOF (81)
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
1MRK 511 365-UUS A
Section 10
Frequency protection
Phasor measurement unit RES670 2.1 ANSI
303
Technical manual
Summary of Contents for Relion 670 Series RES670
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