Directional Supervision Element With Integrated Directional Comparison Function - ABB RED650 Technical Manual

1MRK 505 394-UEN A
BLKTR
EMULTX
IMinx
X
|I
INxMult
X
INx>
BLOCK
2ndHarm_BLOCK_Int
HarmRestrainx=Off
DirModex=Off
DirModex=Non-directional
DirModex=Forward
DirModex=Reverse
IEC10000008 V5 EN-US
Figure 85: Simplified logic diagram for residual overcurrent step x, where x = step 1, 2, 3 or 4
8.4.7.8
Line differential protection RED650 2.2 IEC
Technical manual
Characteristx=DefTime
T
b
a>b
F
a
|
OP
a
a>b
b
T
F
Characteristx=Inverse
OR
STEPx_DIR_Int
OR
AND
FORWARD_Int
AND
REVERSE_Int
The protection can be completely blocked from the binary input BLOCK. Output
signals for respective step, and STINx and TRINx, can be blocked from the binary
input BLKSTx. The trip signals from the function can be blocked from the binary
input BLKTR.
Directional supervision element with integrated directional
comparison function
At least one of the four residual overcurrent steps shall be set as
directional in order to enable execution of the directional
supervision element and the integrated directional comparison
function.
The protection has an integrated directional feature. As the operating quantity
current I is always used, the polarizing method is determined by the parameter
op
setting polMethod. The polarizing quantity will be selected by the function in one
of the following three ways:
1. When polMethod = Voltage, UPol will be used as polarizing quantity.
2. When polMethod = Current, IPol will be used as polarizing quantity.
3. When polMethod = Dual, UPol + IPol · ZNPol will be used as polarizing
quantity.
AND
AND
Inverse
AND
tx
min
t
OR
Current protection
tx
AND
OR t
AND
Section 8
TRINx
STINx
IEC10000008.vsd
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