ABB Relion 670 Series Product Manual page 82

Generator protection REG670
Version 2.2
Table 57. 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
182, table 183 and table 184
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
set
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
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GUID-E83AD807-8FE0-4244-A50E-86B9AF92469E v6
Range or value
lBase
(1-2500)% of
> 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
(-180 to 180) degrees
IBase
(1–100)% of
(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
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
© Copyright 2017 Hitachi Power Grids. All rights reserved
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
±0.2% or ±35 ms whichever is greater
See table 182, table
IBase
±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 502 074-BEN M
183 and table 184
Hitachi Power Grids