Operating And Inhibit Conditions - ABB Relion 670 Series Technical Reference Manual

Section 6
Impedance protection
6.11.2.5
352
ZOUT_A
ZOUT_B
ZOUT_C
TRSP
0
0-tGF
I0CHECK
BLK_I0
BLK_SS
BLOCK
DET1of3 - int.
REL1PH
BLK1PH
DET2of3 - int.
REL2PH
BLK2PH
EXT_PSD
ANSI05000114 V2 EN
Figure 187: Simplified block diagram for ZMRPSB (68) function

Operating and inhibit conditions

Figure 187 presents a simplified logic diagram for the Power swing detection function
ZMRPSB (68). The internal signals DET1of3 and DET2of3 relate to the detailed logic
diagrams in figure 185 and figure
Selection of the operating mode is possible by the proper configuration of the
functional input signals REL1PH, BLK1PH, REL2PH, and BLK2PH.
The load encroachment characteristic can be switched off by setting the parameter
OperationLdCh = Disabled, but notice that the DFw and DRv will still be calculated
from RLdOutFw and RLdOutRv. The characteristic will in this case be only quadrilateral.
There are four different ways to form the internal INHIBIT signal:
OR
ZIN_A
ZIN_B
AND
ZIN_C
AND
10ms
AND
OR
0
0-tR1
AND
0
-loop
0-tR2
AND
0
-loop
AND
0
OR
0-tH
AND
186 respectively.
1MRK505222-UUS C
ZOUT
OR
INHIBIT
OR
OR
PICKUP
AND
en05000114-1-ansi.vsd
Technical reference manual
ZIN