4.4.4.9 Technical data
Table 446: NSPTOV Technical data
Characteristic
Value
Operation accuracy Depending on the frequency of the voltage
measured: f
n
±1.5% of the set value or ±0.002 × U
n
Start time
1)2)
Minimum Typical Maximum
U
Fault
= 1.1 × set
Start
value
U
Fault
= 2.0 × set
Start
value
33 ms
24 ms
35 ms
26 ms
37 ms
28 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
Suppression of harmonics DFT: -50 dB at f = n × f
n
, where n = 2, 3, 4, 5,…
1) Negative-sequence voltage before fault = 0.0 × U
n
, f
n
= 50 Hz, negative-sequence overvoltage with
nominal frequency injected from random phase angle, results based on statistical distribution of 1000
measurements
2) Includes the delay of the signal output contact
4.4.4.10 Technical revision history
Table 447: NSPTOV Technical revision history
Technical revision
Change
B Internal change
C Internal improvement.
D Internal improvement.
4.4.5 Positive-sequence undervoltage protection PSPTUV
4.4.5.1 Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Positive-sequence undervoltage
protection
PSPTUV U1< 47U+
Section 4 1MRS758755 A
Protection functions
430 REC615 and RER615
Technical Manual
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