Name
Values (Range)
Unit
Step
Default
Description
tPRCrv4
0.005 - 3.000
-
0.001
0.500
Parameter PR for customer programmable
curve step 4
tTRCrv4
0.005 - 100.000
-
0.001
13.500
Parameter TR for customer programmable
curve step 4
tCRCrv4
0.1 - 10.0
-
0.1
1.0
Parameter CR for customer programmable
curve step 4
7.5.6
Technical data
Table 207:
NS4PTOC (46I2) technical data
Function
Range or value
Accuracy
Operate value, negative
sequence current, step 1-4
(1-2500)% of
lBase
±
1.0% of I
n
at I
£
I
n
±
1.0% of I at I > I
n
Reset ratio
> 95%
-
Timers
(0.000-60.000) s
±
0.5%
±
10 ms
Inverse characteristics, see
, table
and table
18 curve types
See table
and
Minimum operate current for
step 1 - 4
(1.00 - 10000.00)% of
IBase
± 1.0% of I
n
at I < I
n
± 1.0% of I at I > I
n
Operate value, negative current
for directional release
(1–100)% of
IBase
± 1.0% of I
n
Relay characteristic angle
(-180 to 180) degrees
±
2.0 degrees
Minimum polarizing voltage
(1–100)% of
VBase
±
0.5% of V
n
Minimum polarizing current
(2-100)% of
IBase
±1.0% of I
n
Real part of negative sequence
source impedance used for
current polarization
(0.50-1000.00)
W
/phase
-
Imaginary part of negative
sequence source impedance
used for current polarization
(0.50–3000.00)
W
/phase
-
Operate time, pickup function
25 ms typically at 0.5 to 2 x I
set
-
Reset time, pickup function
25 ms typically at 2 to 0.5 x I
set
-
Critical impulse time, pickup
function
10 ms typically at 0 to 2 x I
set
-
Impulse margin time, pickup
function
15 ms typically
-
Transient overreach
<10% at τ = 100 ms
-
1MRK505222-UUS C
Section 7
Current protection
435
Technical reference manual
Summary of Contents for Relion 670 series
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