Multifrequency Admittance-Based Earth-Fault Protection Mfadpsde - ABB RELION 620 Series Technical Manual

Protection functions
Name Type
ANGLE FLOAT32
ANGLE_RCA FLOAT32
RES_POWER FLOAT32
WPWDE Enum
4.2.7.11 Technical data
Table 467: WPWDE Technical data
Characteristic
Operation accuracy
1 2
Start time ,
Reset time
Reset ratio
Operate time accuracy in definite time mode
Operate time accuracy in IDMT mode
Suppression of harmonics
4.2.8 Multifrequency admittance-based earth-fault protection
MFADPSDE
4.2.8.1 Identification
Description
Multifrequency admittance-based
earth-fault protection
1
Io varied during the test, Uo = 1.0 × U
ted or unearthed network, the residual power value before fault = 0.0 pu, f
based on statistical distribution of 1000 measurements.
2
Includes the delay of the signal output contact.
480
Values (Range) Unit
-180.00...180.00 deg
-180.00...180.00 deg
-160.000...160.000 xPn
1=on
2=blocked
3=test
4=test/blocked
5=off
Value
Depending on the frequency of the measured current: f
Current and voltage:
±1.5% of the set value or ±0.002 × I
Power:
±3% of the set value or ±0.002 × P
Typically 63 ms
Typically 40 ms
Typically 0.96
±1.0% of the set value or ±20 ms
±5.0% of the set value or ±20 ms
-50 dB at f = n × f
IEC 61850
identification
MFADPSDE
= phase-to-earth voltage during earth fault in compensa-
n
Description
Angle between polar-
izing and operating
quantity
Angle between operat-
ing angle and charac-
teristic angle
Calculated residual ac-
tive power
Status
n
n
, where n = 2,3,4,5,...
n
IEC 60617 ANSI/IEEE C37.2
identification device number
Io> ->Y 67YN
= 50 Hz, results
n
Technical Manual
1MRS757644 H
±2 Hz
n
620 series