ABB RED650, Technical Manual

Page: 203 / 926

X
Inverse
OR
|I
OP
|
STINx
TRINx
AND
T
F
HarmRestrainx=Off
INx>
BLKSTx
BLOCK
OR
2ndHarm_BLOCK_Int
INxMult
Characteristx=Inverse
Characteristx=DefTime
DirModex=Off
DirModex=Non-directional
DirModex=Forward
DirModex=Reverse
AND
AND
FORWARD_Int
REVERSE_Int
OR
OR STEPx_DIR_Int
IEC10000008.vsd
X
T
F
a
b
a>b
b
a
a>b
IMinx
AND
BLKTR
AND
AND
tx
min
tx
AND
t
t
EMULTX
IEC10000008 V5 EN-US
Figure 85: Simplified logic diagram for residual overcurrent step x, where x = step 1, 2, 3 or 4
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.
8.4.7.8 Directional supervision element with integrated directional
comparison function
M13941-179 v11
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
op
is always used, the polarizing method is determined by the parameter
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.
1MRK 505 394-UEN A
Section 8
Current protection
Line differential protection RED650 2.2 IEC 197
Technical manual