ABB Relion 670 Series Product Manual page 66

Line differential protection RED670 2.0
Product version: 2.0
Table 46. Four step negative sequence overcurrent protection NS4PTOC
Function
Operate value, negative
sequence current, step 1-4
Reset ratio
Independent time delay for
step 1, 2, 3, and 4 at 0 to 2 x I
set
Inverse characteristics, see
table 131, table 132 and table
133
Minimum operate current for
steps 1 - 4
Relay characteristic angle
Operate value, negative
current for directional release
Minimum polarizing voltage
Minimum polarizing current
Real part of negative sequence
source impedance used for
current polarization
Imaginary part of negative
sequence source impedance
used for current polarization
Operate time, start function at
0 to 2 x I
set
Reset time, start function at 2
to 0 x I
set
Critical impulse time, start
function
Impulse margin time, start
function
Transient overreach
66
Range or value
(1-2500)% of lBase
IBase
> 95% at (10-2500)% of
(0.000-60.000) s
16 curve types
IBase
(1.00 - 10000.00)% of
(-180 to 180) degrees
IBase
(1–100)% of
UBase
(1–100)% of
IBase
(2-100)% of
(0.50-1000.00) W/phase
(0.50–3000.00) W/phase
Min = 15 ms
Max = 30 ms
Min = 15 ms
Max = 30 ms
10 ms typically at 0 to 2 x I
set
15 ms typically
<10% at τ = 100 ms
1MRK505310-BEN C
Accuracy
± 1.0% of I at I £ I
r r
± 1.0% of I at I > I
r
-
± 0.2% or ± 35 ms whichever is
greater
See table 131, table 132 and table
133
± 1.0% of I at I ≤ I
r r
± 1.0% of I at I > I
r
± 2.0 degrees
For RCA ± 60 degrees:
± 2.5% of I at I ≤ I
r r
± 2.5% of I at I > I
r
± 0.5% of U
r
±1.0% of I
r
-
-
-
-
-
-
-
ABB