ABB RELION REX640 - 4.5.5.10 Technical data; 4.5.6 Positive-sequence undervoltage protection PSPTUV (ANSI 27 PS); 4.5.6.1 Identification; 4.5.6.2 Function block

4.5.5.9 NSPTOV Monitored data
Table 828: NSPTOV Monitored data
Name Type Values (Range) Unit Description
START_DUR FLOAT32 0.00...100.00 % Ratio of start time / op-
erate time
NSPTOV Enum
1=on
2=blocked
3=test
4=test/blocked
5=off
Status
4.5.5.10 Technical data
Table 829: 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
U
Fault
= 1.1 × set
Start value
U
Fault
= 2.0 × set
Start value
Minimum Typical Maximum
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,…
4.5.6 Positive-sequence undervoltage protection PSPTUV (ANSI
27PS)
4.5.6.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Positive-sequence undervoltage
protection
PSPTUV U1< 27PS
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 distribu-
tion of 1000 measurements
2
Includes the delay of the signal output contact
1MRS759142 F Protection functions
REX640
Technical Manual
879