ABB Relion 670 series - Page 676

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-US
Figure 363: Simplified logic diagram for SAPTUF (81)
10.1.8 Technical data
M13360-1 v13
Table 385: SAPTUF (81) technical data
Function Range or value Accuracy
Trip value, pickup function, at symmetrical three
phase voltage
(35.00-75.00) Hz ±2.0 mHz
Trip time, pickup at f
set
+ 0.02 Hz to f
set
- 0.02
Hz
fn = 50 Hz
Min. = 80 ms
-
Max. = 95 ms
fn = 60 Hz
Min. = 65 ms
Max. = 80 ms
Reset time, pickup at f
set
- 0.02 Hz to f
set
+ 0.02
Hz
Min. = 15 ms
Max. = 30 ms
-
Trip time, definite time function at f
set
+ 0.02 Hz
to f
set
- 0.02 Hz
(0.000-60.000)s ±0.2% or ±100 ms whichever is
greater
Table continues on next page
Section 10 1MRK 502 066-UUS B
Frequency protection
670
Technical manual