Power Swing Detection Zmrpsb (68) - ABB Relion Technical Manual

1MRK 502 048-UUS A
Section 7
7.1
7.1.1
7.1.2
7.1.3
Technical manual
Impedance protection

Power swing detection ZMRPSB (68)

Identification
Function description
Power swing detection
Functionality
Power swings may occur after disconnection of heavy loads, upon severe fault clearing or
after tripping of big generation plants.
Power swing detection function ZMRPSB (68) is used to detect power swings and initiate
block of all distance protection zones. Occurrence of ground-fault currents during a power
swing inhibits the ZMRPSB (68) function to allow fault clearance.
Function block
ZMRPSB (68)
I3P* PICKUP
V3P* ZOUT
BLOCK ZIN
BLK_SS
BLK_I0
I0CHECK
EXT_PSD
ANSI09000058-1-en.vsd
ANSI09000058 V1 EN
Figure 61: ZMRPSB (78) 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
151