4.4.1.8 Monitored data
Table 362: NSPTOC Monitored data
Name Type Values (Range) Unit Description
START_DUR FLOAT32 0.00...100.00 % Ratio of start time /
operate time
NSPTOC Enum 1=on
2=blocked
3=test
4=test/blocked
5=off
Status
4.4.1.9 Technical data
Table 363: NSPTOC Technical data
Characteristic Value
Operation accuracy Depending on the frequency of the current
measured: f
n
±2 Hz
±1.5% of the set value or ±0.002 x I
n
Start time
1)2)
Minimum Typical Maximum
I
Fault
= 2 x set
Start
value
I
Fault
= 10 x set
Start
value
22 ms
14 ms
24 ms
16 ms
25 ms
17 ms
Reset time < 40 ms
Reset ratio Typical 0.96
Retardation time < 35 ms
Operate time accuracy in definite time mode ±1.0% of the set value or ±20 ms
Operate time accuracy in inverse time mode
±5.0% of the theoretical value or ±20 ms
3)
Suppression of harmonics DFT: -50 dB at f = n x f
n
, where n = 2, 3, 4, 5,…
1) Negative sequence current before fault = 0.0, f
n
= 50 Hz, results based on statistical distribution of
1000 measurements
2) Includes the delay of the signal output contact
3) Maximum
Start value
= 2.5 x I
n
,
Start value
multiples in range of 1.5 to 20
4.4.1.10 Technical revision history
Table 364: NSPTOC Technical revision history
Technical revision
Change
B Minimum and default values changed to 40 ms
for the
Operate delay time
setting
C Step value changed from 0.05 to 0.01 for the
Time multiplier
setting
1YHT530004D05 D Section 4
Protection functions
615 series 451
Technical Manual
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