ABB Relion 670 series - Page 80

Table 37. Line differential protection L3CPDIF, L6CPDIF, LT3CPDIF , LT6CPDIF with 2 Mbits/s communication
Function Range or value Accuracy
Minimum operate current (20-200)% of IBase ±1.0% of I
r
at I ≤ I
r
±1.0% of I at I > I
r
SlopeSection2 (10.0-50.0)% -
SlopeSection3 (30.0-100.0)% -
EndSection 1 (20–150)% of IBase -
EndSection 2 (100–1000)% of IBase -
Unrestrained limit function (100–5000)% of IBase ±1.0% of I
r
at I ≤ I
r
±1.0% of I at I > I
r
Second harmonic blocking (5.0–100.0)% of fundamental ±1.0% of I
r
Note: fundamental magnitude = 100% of I
r
Fifth harmonic blocking (5.0–100.0)% of fundamental ±3.0% of I
r
Note: fundamental magnitude = 100% of I
r
*Inverse characteristics, see table
196,198 and table 200
16 curve types See table 196,198 and table 200
Critical impulse time 2 ms typically at 0 to 10 x I
dMin
-
Charging current compensation On/Off -
LT3CPDIF and LT6CPDIF (With in-zone transformer enabled and tIdMinHigh set to 0) :
*Operate time, restrained function at
0 to 10 x I
dMin
Min. = 25 ms
Max. = 40 ms
-
*Reset time, restrained function at 10
x I
dMin
to 0
Min. = 5 ms
Max. = 20 ms
-
*Operate time, unrestrained function
at 0 to 10 x I
dUnre
Min. = 5 ms
Max. = 20 ms
-
*Reset time, unrestrained function at
10 x I
dUnre
to 0
Min. = 15 ms
Max. = 35 ms
-
**Operate time, unrestrained negative
sequence function
Min. = 10 ms
Max. = 25 ms
-
**Reset time, unrestrained negative
sequence function
Min. = 10 ms
Max. = 30 ms
-
L3CPDIF and L6CPDIF (With tIdMinHigh set to 0):
*Operate time, restrained function at
0 to 10 x I
dMin
Min. = 10 ms
Max. = 20 ms
-
*Reset time, restrained function at 10
x I
dMin
to 0
Min. = 15 ms
Max. = 30 ms
-
*Operate time, unrestrained function
at 0 to 10 x I
d
Min. = 5 ms
Max. = 20 ms
-
*Reset time, unrestrained function at
10 x I
dUnre
to 0
Min. = 15 ms
Max. = 35 ms
-
Line differential protection RED670
1MRK 505 379-BEN N
Version 2.2
80 Hitachi Power Grids
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