ABB RES670 Product Manual page 33

Phasor measurement unit RES670 ANSI
Customized
Product version: 1.2
Table 24. Four step negative sequence overcurrent protection NS4PTOC (46I2)
Function
Operate value, negative
sequence current, step 1-4
Reset ratio
Timers
Inverse characteristics, see table
66, table 67 and table 68
Minimum operate current for step
1 - 4
Operate value, negative current
for directional release
Relay characteristic angle
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, pickup function
Reset time, pickup function
Critical impulse time, pickup
function
Impulse margin time, pickup
function
Transient overreach
ABB
Range or value
lBase
(1-2500)% of
> 95%
(0.000-60.000) s
18 curve types
IBase
(1.00 - 10000.00)% of
IBase
(1–100)% of
(-180 to 180) degrees
VBase
(1–100)% of
IBase
(2-100)% of
(0.50-1000.00) W/phase
(0.50–3000.00) W/phase
25 ms typically at 0.5 to 2 x I
set
25 ms typically at 2 to 0.5 x I
set
10 ms typically at 0 to 2 x I
set
15 ms typically
<10% at τ = 100 ms
1MRK511254-BUS B
Accuracy
± 1.0% of I at I £ I
n n
± 1.0% of I at I > I
n
-
± 0.5% ± 10 ms
See table 66, table 67 and table
68
± 1.0% of I at I < I
n n
± 1.0% of I at I > I
n
± 1.0% of I
n
± 2.0 degrees
± 0.5% of V
n
±1.0% of I
n
-
-
-
-
-
-
-
33