Section 7
Impedance protection
7.1
Power swing detection ZMRPSB (68)
7.1.1
Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Power swing detection
ZMRPSB
Zpsb
SYMBOL-EE V1 EN
68
7.1.2
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.
7.1.3
Function block
ANSI09000058-1-en.vsd
ZMRPSB (68)
I3P*
V3P*
BLOCK
BLK_SS
BLK_I0
I0CHECK
EXT_PSD
PICKUP
ZOUT
ZIN
ANSI09000058 V1 EN
Figure 61:
ZMRPSB (78) function block
1MRK 502 048-UUS A
Section 7
Impedance protection
151
Technical manual
Содержание Relion
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