ABB Relion 650 Series Technical Manual page 144

Section 5
Impedance protection
Function
Reset ratio, residual voltage
Operate value, residual current
Reset ratio, residual current
Timers
Operating mode
5.7 Power swing detection ZMRPSB (68)
5.7.1 Identification
Function description
Power swing detection
5.7.2 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
selected distance protection zones. Occurrence of ground-fault currents during a power swing
inhibits the ZMRPSB (68) function to allow fault clearance.
5.7.3 Function block
I3P*
V3P*
BLOCK
BLK_SS
BLK_I0
I0CHECK
EXT_PSD
ANSI09000058 V1 EN-US
Figure 78: ZMRPSB (78) function block
138
Range or value
> 95%
(10 - 200)% of IBase
> 95%
(0.000 - 60.000) s
No Filter, NoPref
Cyclic: 1231c, 1321c
Acyclic: 123a, 132a, 213a, 231a,
312a, 321a
ZMRPSB (68)
PICKUP
ZOUT
ZIN
ANSI09000058-1-en.vsd
© Copyright 2011 ABB Power Grids. All rights reserved
Accuracy
-
± 1,0% of I
± 1,0% of I for I > I
-
± 0,5% ± 10 ms
IEC 61850 IEC 60617
identification identification
ZMRPSB
Zpsb
SYMBOL-EE V1 EN-US
1MRK 506 326-UUS B
for I < I
n n
n
ANSI/IEEE C37.2
device number
68
Line distance protection REL650
Technical manual
IP14499-1 v3
M14853-1 v3
M13873-3 v8
M13884-3 v5