Section 4
Protection functions
Table 666:
NSPTOC Non group settings (Advanced)
Parameter
Minimum operate time
Reset delay time
4.4.1.9
4.4.1.10
740
Values (Range)
Unit
20...60000
ms
0...60000
ms
Monitored data
Table 667:
NSPTOC Monitored data
Name
START_DUR
NSPTOC
Technical data
Table 668:
NSPTOC Technical data
Characteristic
Operation accuracy
1)2)
Start time
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
Operate time accuracy in inverse time mode
Suppression of harmonics
1) Negative sequence current before fault = 0.0, f
measurements
2) Includes the delay of the signal output contact
3) Maximum
Start value = 2.5 × I
Step
Default
1
20
1
20
Type
Values (Range)
FLOAT32
0.00...100.00
Enum
1=on
2=blocked
3=test
4=test/blocked
5=off
Value
Depending on the frequency of the measured
current: f
±1.5% of the set value or ±0.002 × I
Minimum
Start
I
= 2 × set
23 ms
Fault
15 ms
value
Start
I
= 10 × set
Fault
value
Typically 40 ms
Typically 0.96
<35 ms
±1.0% of the set value or ±20 ms
±5.0% of the theoretical value or ±20 ms
DFT: -50 dB at f = n × f
= 50 Hz, results based on statistical distribution of 1000
n
,
Start value multiples in range of 1.5...20
n
1MRS759142 C
Description
Minimum operate time for IDMT curves
Reset delay time
Unit
Description
%
Ratio of start time /
operate time
Status
±2 Hz
n
n
Typical
Maximum
26 ms
28 ms
18 ms
20 ms
, where n = 2, 3, 4, 5,...
n
Technical Manual
3)
REX640