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
