Technical Data; Rate-Of-Change Frequency Protection Sapfrc - ABB RET650 Technical Manual

Section 10
Frequency protection
10.2.8
10.3
238
BLOCK
BLKTRIP
Comparator
U < IntBlockLevel
Voltage
Frequency Comparator
f > StartFrequency
IEC05000735 V1 EN
Figure 107: Schematic design of overfrequency protection SAPTOF

Technical data

Table 163: SAPTOF technical data
Function
Operate value, start function
Reset ratio
Operate time, start function
Reset time, start function
Timer

Rate-of-change frequency protection SAPFRC

OR
Time integrator
Definite Time Delay
TimeDlyOperate
TimeDlyReset
Range or value
(35.00-75.00) Hz
>0.999
At 50 Hz: 200 ms typically at f
+0.5 Hz
At 60 Hz: 170 ms typically at f
+0.5 Hz
At 50 and 60 Hz: 55 ms typically at f
to f -0.5 Hz
set
(0.000-60.000)s
1MRK 504 135-UEN A
BLOCK
BLKDMAGN
Start
&
Trip
Output
Logic
START
TRIP
en05000735.vsd
Accuracy
± 2.0 mHz at
symmetrical three-
phase voltage
-
-0.5 Hz to f -
set set
-0.5 Hz to f
set set
+0.5 Hz -
set
<250 ms
Technical manual
START
TRIP