ABB Relion 650 Series Technical Manual page 271

1MRK 506 326-UUS B
8.3.6.3 Design
BLOCK
freqNotValid
Rate-of-Change
of Frequency
Frequency
ANSI08000009 V1 EN-US
Figure 135: Schematic design of Rate-of-change frequency protection SAPFRC (81)
8.3.7 Technical data
Table 201: SAPFRC (81) technical data
Function
Operate value, pickup function
Operate value, restore enable frequency
Timers
Operate time, pickup function
Line distance protection REL650
Technical manual
Comparator
If
[PUFreqGrad<0
PICKUP
AND
df/dt < PUFreqGrad]
OR
[PUFreqGrad>0
AND
df/dt > PUFreqGrad]
Then
PICKUP
Comparator
f > RestoreFreq
© Copyright 2011 ABB Power Grids. All rights reserved
BLOCK
OR
Definite Time Delay
tTrip
tRestore
Range or value
(-10.00-10.00) Hz/s
(45.00 - 65.00) Hz
(0.000 - 60.000) s
At 50 Hz: 100 ms typically
At 60 Hz: 80 ms typically
Frequency protection
BLKDMAGN
Pickup
&
Trip
Output
Logic
100 ms
RESTORE
ANSI08000009_en_1.vsd
Accuracy
± 10.0 mHz/s
± 2.0 mHz
<130 ms
-
Section 8
M14970-34 v5
PICKUP
TRIP
M14976-1 v5
265