Parameter Values (Range) Unit Step Default Description
Curve parameter D 0.46...30.00 1 29.10 Parameter D for
customer program-
mable curve
Curve parameter E 0.0...1.0 1 1.0 Parameter E for
customer program-
mable curve
Table 544: NSPTOC Non group settings (Advanced)
Parameter Values (Range) Unit Step Default Description
Minimum operate
time
20...60000 ms 1 20 Minimum operate
time for IDMT
curves
Reset delay time 0...60000 ms 1 20 Reset delay time
4.4.1.8 Monitored data
Table 545: NSPTOC Monitored data
Name Type Values (Range) Unit Description
START_DUR FLOAT32 0.00...100.00 % Ratio of start time / op-
erate time
NSPTOC Enum
1=on
2=blocked
3=test
4=test/blocked
5=off
Status
4.4.1.9 Technical data
Table 546: NSPTOC Technical data
Characteristic
Value
Operation accuracy Depending on the frequency of the measured current: f
n
±2 Hz
±1.5% of the set value or ±0.002 × I
n
Start time , Minimum Typical Maximum
I
Fault
= 2 × set
Start value
I
Fault
= 10 × set
Start value
23 ms
15 ms
26 ms
18 ms
28 ms
20 ms
Reset time Typically 40 ms
Reset ratio Typically 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
Suppression of harmonics
DFT: -50 dB at f = n × 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 × I
n
,
Start value
multiples in range of 1.5...20.
Protection functions 1MRS757644 H
614 620 series
Technical Manual
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