Section 7 Impedance Protection; Power Swing Detection Zmrpsb; Identification; Functionality - ABB RET650 Technical Manual

1MRK 504 135-UEN A
Section 7
7.1
7.1.1
7.1.2
7.1.3
Technical manual
Impedance protection

Power swing detection ZMRPSB

Identification

Function description
Power swing detection

Functionality

Power swings may occur after disconnection of heavy loads or trip of big generation
plants.
Power swing detection function ZMRPSB is used to detect power swings and initiate
block of all distance protection zones. Occurrence of earth-fault currents during a
power swing inhibits the ZMRPSB function to allow fault clearance.

Function block

ZMRPSB
I3P* START
U3P* ZOUT
BLOCK ZIN
BLKI01
BLKI02
I0CHECK
EXTERNAL
IEC09000058-1-en.vsd
IEC09000058 V1 EN
Figure 50: ZMRPSB function block
Impedance protection
IEC 61850 IEC 60617
identification identification
ZMRPSB
Zpsb
SYMBOL-EE V1 EN
Section 7
ANSI/IEEE C37.2
device number
68
123