ABB Relion 670 Series Product Manual page 71

Busbar protection REB670
Version 2.2
Table 44. Four step directional negative phase sequence overcurrent protection NS4PTOC
Function
Operate current, step 1 - 4
Reset ratio
Independent time delay at 0 to 2 x I
step 1 - 4
Minimum operate time for inverse curves,
step 1 - 4
Inverse time characteristics, see table
165, table 166 and table 167
Minimum operate current, step 1 - 4
Relay characteristic angle (RCA)
Operate current for directional release
Minimum polarizing voltage
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 non-directional at 0 to
2 x I
set
Reset time, start non-directional at 2 x I
to 0
Operate time, start non-directional at 0 to
10 x I
set
Reset time, start non-directional at 10 x
I to 0
set
Critical impulse time
Impulse margin time
Transient overreach
Hitachi Power Grids
GUID-E83AD807-8FE0-4244-A50E-86B9AF92469E v7
Range or value
(1-2500)% of lBase
> 95% at (10-2500)% of IBase
, (0.000-60.000) s
set
(0.000 - 60.000) s
16 curve types
(1.00 - 10000.00)% of IBase
(-180 to 180) degrees
(1–100)% of IBase
(1–100)% of UBase
(0.50-1000.00) W/phase
(0.50–3000.00) W/phase
Min. = 15 ms
Max. = 30 ms
Min. = 15 ms
set
Max. = 30 ms
Min. = 5 ms
Max. = 20 ms
Min. = 20 ms
Max. = 35 ms
10 ms typically at 0 to 2 x I
15 ms typically
<10% at τ = 100 ms
© 2017 - 2021 Hitachi Power Grids. All rights reserved
Accuracy
at I £ I
±1.0% of I
r r
±1.0% of I at I > I
r
-
±0.2% or ±35 ms whichever is greater
±0.2% or ±35 ms whichever is greater
See table 165, table 166
±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
-
-
-
-
-
-
-
set
-
-
1MRK 505 373-BEN P
and table 167
71