ABB RELION REX640 Technical Manual page 879

1MRS759142 F
4.5.5.9 NSPTOV Monitored data
Table 828: NSPTOV Monitored data
Name Type
START_DUR FLOAT32
NSPTOV Enum
4.5.5.10 Technical data
Table 829: NSPTOV Technical data
Characteristic
Operation accuracy
Start time
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite
time mode
Suppression of harmonics
4.5.6 Positive-sequence undervoltage protection PSPTUV (ANSI
27PS)
4.5.6.1 Identification
Function description
Positive-sequence undervoltage
protection
1
Negative-sequence voltage before fault = 0.0 × U
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
REX640
Technical Manual
Values (Range)
0.00...100.00
1=on
2=blocked
3=test
4=test/blocked
5=off
1, 2
U = 1.1 × set
Fault
Start value
U = 2.0 × set
Fault
Start value
Unit
%
Value
Depending on the frequency of the voltage measured:
f
n
±1.5% of the set value or ±0.002 × U
Minimum Typical
33 ms 35 ms
24 ms 26 ms
Typically 40 ms
Typically 0.96
<35 ms
±1.0% of the set value or ±20 ms
DFT: -50 dB at f = n × f , where n = 2, 3, 4, 5,...
n
IEC 61850 IEC 60617
identification identification
PSPTUV U1<
, f = 50 Hz, negative-sequence overvoltage
n n
Protection functions
Description
Ratio of start time / op-
erate time
Status
n
Maximum
37 ms
28 ms
ANSI/IEEE C37.2
device number
27PS
879