ABB RELION REX640 Technical Manual page 825

1MRS759142 F
4.4.1.9 NSPTOC Monitored data
Table 741: NSPTOC Monitored data
Name Type
START_DUR FLOAT32
NSPTOC Enum
4.4.1.10 Technical data
Table 742: NSPTOC Technical data
Characteristic
Operation accuracy
Start time
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode ±1.0% of the set value or ±20 ms
Operate time accuracy in inverse time mode
Suppression of harmonics
4.4.2 Directional negative-sequence overcurrent protection
DNSPDOC (ANSI 67Q)
4.4.2.1 Identification
Function description
Directional negative-sequence over-
current protection
1
Negative sequence current before fault = 0.0, f
of 1000 measurements.
2
Includes the delay of the signal output contact.
3 Start value = 2.5 × I
Maximum
REX640
Technical Manual
Values (Range)
0.00...100.00
1=on
2=blocked
3=test
4=test/blocked
5=off
1, 2
I = 2 × set
Fault
value
I = 10 × set
Fault
value
Start value multiples in range of 1.5...20.
,
n
Unit
%
Value
Depending on the frequency of the measured
current: f
n
±1.5% of the set value or ±0.002 × I
Minimum
Start
23 ms
15 ms
Start
Typically 40 ms
Typically 0.96
<35 ms
±5.0% of the theoretical value or ±20 ms
DFT: -50 dB at f = n × f
IEC 61850 IEC 60617
identification identification
DNSPDOC I2> ->
= 50 Hz, results based on statistical distribution
n
Protection functions
Description
Ratio of start time / op-
erate time
Status
n
Typical Maximum
26 ms 28 ms
18 ms 20 ms
, where n = 2, 3, 4, 5,...
n
ANSI/IEEE C37.2
device number
67Q
3
825