ABB Relion 670 series, Technical Reference Manual

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en05000114-1-ansi.vsd
TRSP
I0CHECK
AND
BLK_I0
AND
BLK_SS
BLOCK
INHIBIT
ZOUT_C
ZOUT_B
ZOUT_A
DET1of3 - int.
REL1PH
BLK1PH
AND
DET2of3 - int.
REL2PH
BLK2PH
AND
EXT_PSD
AND
PICKUP
ZOUT
ZIN_A
ZIN_B
ZIN_C
ZIN
AND
OR
AND
AND
OR
OR
OR
OR
OR
-loop
-loop
0
0-tGF
10ms
0
0-tH
0
0
0-tR2
0-tR1
0
ANSI05000114 V2 EN
Figure 187: Simplified block diagram for ZMRPSB (68) function
6.11.2.5 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 186 respectively.
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
D
Fw and
D
Rv 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:
Section 6
1MRK505222-UUS C
Impedance protection
352
Technical reference manual