Section 9 Frequency Protection; Underfrequency Protection Saptuf; Identification; Functionality - ABB REG650 Technical Manual

1MRK 502 034-UEN -
Section 9
9.1
9.1.1
9.1.2
9.1.3
9.1.4
Technical Manual
Frequency protection

Underfrequency protection SAPTUF

Identification

Function description
Underfrequency protection

Functionality

Underfrequency occurs as a result of lack of generation in the network.
Underfrequency protection SAPTUF is used for load shedding systems, remedial
action schemes, gas turbine startup and so on.
SAPTUF is provided with an undervoltage blocking.

Function block

SAPTUF
U3P* TRIP
BLOCK START
RESTORE
BLKDMAGN
IEC09000282_1_en.vsd
IEC09000282 V1 EN
Figure 131: SAPTUF function block

Signals

Table 156: SAPTUF Input signals
Name Type
U3P GROUP
SIGNAL
BLOCK BOOLEAN
Frequency protection
IEC 61850 IEC 60617
identification identification
SAPTUF
SYMBOL-P V1 EN
Default Description
- Three phase group signal for voltage inputs
0 Block of function
Section 9
ANSI/IEEE C37.2
device number
81
f <
255