ABB RELION REX640 Technical Manual page 1078

Protection functions
4.8.3.9 DQPTUV Monitored data
Table 1016: DQPTUV Monitored data
Name Type
START_DUR FLOAT32
Q FLOAT32
DQPTUV Enum
4.8.3.10 Technical data
Table 1017: DQPTUV Technical data
Characteristic
Operation accuracy
Start time
Reset time
Reset ratio
Operate time accuracy
Suppression of harmonics
4.8.4 Underpower factor protection MPUPF (ANSI 55U)
4.8.4.1 Identification
Function description
Underpower factor protection
1
Start value = 0.05 × S
times, results based on statistical distribution of 1000 measurements
2
Includes the delay of the signal output contact
1078
Values (Range)
0.00...100.00
-160.000...160.000
1=on
2=blocked
3=test
4=test/blocked
5=off
1, 2
, reactive power before fault = 0.8 ×
n
Unit
%
xSn
Value
Depending on the frequency of the measured
current and voltage:
f ±2 Hz
n
Reactive power range |PF| <0.71
Power:
±3.0 % or ±0.002 × Q
Voltage:
±1.5 % of the set value or ±0.002 × U
Typically 46 ms
<50 ms
Typically 0.96
±1.0 % of the set value or ±20 ms
DFT: -50 dB at f = n × f
IEC 61850 IEC 60617
identification identification
MPUPF PF<
Start value , reactive power overshoot 2
1MRS759142 F
Description
Ratio of start time / op-
erate time
Reactive power
Status
n
n
, where n = 2, 3, 4, 5,...
n
ANSI/IEEE C37.2
device number
55U
REX640
Technical Manual