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 282:
Simplified logic diagram for SAPTUF (81)
9.1.3
Function block
ANSI06000279-2-en.vsd
SAPTUF (81)
V3P*
BLOCK
BLKTRIP
BLKREST
TRIP
PICKUP
RESTORE
BLKDMAGN
FREQ
ANSI06000279 V2 EN
Figure 283:
SAPTUF (81) function block
9.1.4
Input and output signals
Table 285:
SAPTUF (81) Input signals
Name
Type
Default
Description
V3P
GROUP
SIGNAL
-
Voltage connection
BLOCK
BOOLEAN
0
Block of function
BLKTRIP
BOOLEAN
0
Blocking operate output.
BLKREST
BOOLEAN
0
Blocking restore output.
1MRK505222-UUS C
Section 9
Frequency protection
555
Technical reference manual
Summary of Contents for Relion 670 series
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