ABB Relion 620 Series - Power Protection; Underpower Protection DUPPDPR

Name Type Values (Range) Unit Description
Z_ANGLE_CA FLOAT32 -180.00...180.00 deg Phase-to-phase C-A im-
pedance phase angle
Z1_AMPL FLOAT32 0.00...200.00 xZn Positive sequence im-
pedance amplitude
Z1_ANGLE FLOAT32 -180.00...180.00 deg Positive sequence im-
pedance phase angle
UEXPDIS Enum
1=on
2=blocked
3=test
4=test/blocked
5=off
Status
4.7.1.9 Technical data
Table 690: UEXPDIS Technical data
Characteristic Value
Operation accuracy Depending on the frequency of the measured current and
voltage:
f = f
n
± 2 Hz
±3.0% of the set value or ±0.2% Zb
Start time , Typically 45 ms
Reset time Typically 30 ms
Reset ratio Typically 1.04
Retardation time Total retardation time when the impedance returns from the
operating circle <40 ms
Operate time accuracy ±1.0% of the set value or ±20 ms
Suppression of harmonics -50 dB at f = n × f
n
, where n = 2, 3, 4, 5,…
4.8 Power protection
4.8.1 Underpower protection DUPPDPR
4.8.1.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Underpower protection DUPPDPR P< 32U
1
f
n
= 50Hz, results based on statistical distribution of 1000 measurements
2
Includes the delay of the signal output contact
Protection functions 1MRS757644 H
728 620 series
Technical Manual