ABB RELION 670 Series Technical Manual page 676

Section 10
Frequency protection
Block
Voltage
Frequency
ANSI05000726 V1 EN-US
Figure 363: Simplified logic diagram for SAPTUF (81)
10.1.8 Technical data
Table 385: SAPTUF (81) technical data
Function
Trip value, pickup function, at symmetrical three
phase voltage
Trip time, pickup at f
Hz
Reset time, pickup at f
Hz
Trip time, definite time function at f
to f - 0.02 Hz
set
Table continues on next page
670
Comparator
V < IntBlockLevel
Comparator
f < PuFrequency
Comparator
f > RestoreFreq
+ 0.02 Hz to f - 0.02
set set
- 0.02 Hz to f
set set
+ 0.02 Hz
set
OR
Time integrator
TimerOperation Mode
Selector
TimeDlyOperate
TimeDlyReset
TimeDlyRestore
Range or value
(35.00-75.00) Hz
Min. = 80 ms
fn = 50 Hz
Max. = 95 ms
Min. = 65 ms
fn = 60 Hz
Max. = 80 ms
+ 0.02 Min. = 15 ms
Max. = 30 ms
(0.000-60.000)s
1MRK 502 066-UUS B
BLOCK
Pickup
&
PICKUP
Trip
Output
Logic
TRIP
RESTORE
en05000726_ansi.vsd
Accuracy
±2.0 mHz
±0.2% or ±100 ms whichever is
greater
BLKDMAGN
PICKUP
TRIP
100 ms
M13360-1 v13
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Technical manual