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 or trip 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
ANSI06000264-2-en.vsd
ZMRPSB (68)
I3P*
V3P*
BLOCK
BLK_SS
BLK_I0
BLK1PH
REL1PH
BLK2PH
REL2PH
I0CHECK
TRSP
EXT_PSD
PICKUP
ZOUT
ZIN
ANSI06000264 V2 EN
Figure 35:
ZMRPSB (68) function block
1MRK 511 365-UUS A
Section 7
Impedance protection
Phasor measurement unit RES670 2.1 ANSI
145
Technical manual
Содержание Relion 670 Series RES670
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