ABB Relion 670 Series Technical Reference Manual page 434

Section 7
Current protection
0.6
X
IDirPU
X
0.4
polMethod=Voltage
polMethod=Dual
polMethod=Current
BLOCK
ANSI07000067 V4 EN
Figure 215: Simplified logic diagram for directional supervision element with integrated directional comparison step
428
These signals must be used for communication based fault teleprotection
communication schemes (permissive or blocking).
Simplified logic diagram for directional supervision element with integrated directional
comparison step is shown in figure 208:
| |
IopDir
a
a>b
b
a
a>b
b
OR
OR
IPol
T
0.0
F
RNPol
X
Complex
Number
XNPol
AND
REVERSE_Int
AND
FORWARD_Int
AngleRCA
VPolMin
IPolMin
VPol
T
I3PDIR
0.0
F
VTPol
VIPol
STAGE1_DIR_Int
T
STAGE2_DIR_Int
0.0
F
STAGE3_DIR_Int
STAGE4_DIR_Int
1MRK505222-UUS C
PUREV
PUFW
FWD
AND FORWARD_Int
AND
REVERSE_Int
RVS
OR
AND
ANSI07000067-4-en.vsd
Technical reference manual