Identification - ABB REG650 Technical Manual

1MRK 502 043-UUS B
10.3.1
10.3.2
10.3.3
10.3.4
Technical Manual

Identification

Function description
Rate-of-change frequency protection
Functionality
Rate-of-change frequency protection function (SAPFRC,81) gives an early indication
of a main disturbance in the system. SAPFRC (81) can be used for generation
shedding, load shedding and remedial action schemes. SAPFRC (81) can discriminate
between positive or negative change of frequency.
SAPFRC (81) is provided with an undervoltage blocking.
Function block
SAPFRC (81)
V3P* TRIP
BLOCK PICKUP
RESTORE
BLKDMAGN
ANSI09000281-1-en.vsd
ANSI09000281 V1 EN
Figure 139: SAPFRC (81) function block
Signals
Table 177: SAPFRC (81) Input signals
Name Type
V3P GROUP
SIGNAL
BLOCK BOOLEAN
IEC 61850 IEC 60617
identification identification
SAPFRC
df/dt > <
SYMBOL-N V1 EN
Default Description
- Three phase group signal for voltage inputs
0 Block of function
Section 10
Frequency protection
ANSI/IEEE C37.2
device number
81
299