ABB REL650 series Technical Manual page 236

Section 7
Current protection
0.6
X
IDirPU
X
0.4
polMethod=Voltage
polMethod=Dual
polMethod=Current
BLOCK
ANSI07000067 V4 EN
Figure 103: Simplified logic diagram for directional supervision element with integrated directional comparison step
230
1. PUFW=1 when operating quantity magnitude Iop x cos(φ - AngleRCA) is bigger than
setting parameter IDirPU and directional supervision element detects fault in
forward direction.
2. PUREV=1 when operating quantity magnitude Iop x cos(φ - AngleRCA) is bigger
than 60% of setting parameter IDirPU and directional supervision element detects
fault in reverse direction.
These signals shall be used for communication based ground-fault teleprotection
communication schemes (permissive or blocking).
Simplified logic diagram for directional supervision element with integrated directional
comparison step is shown in figure 103:
|
|
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
1MRK 506 335-UUS A
PUREV
PUFW
FWD
AND FORWARD_Int
AND
REVERSE_Int
RVS
OR
AND
ANSI07000067-4-en.vsd
Technical manual