ABB RED615 - Admittance-Based Earth-Fault Protection (EFPADM) Main Settings; Wattmetric-Based Earth-Fault Protection (WPWDE)

Table 37. Admittance-based earth-fault protection (EFPADM) main settings
Parameter Function Value (Range) Step
Voltage start value EFPADM 0.01...2.00 × U
n
0.01
Directional mode EFPADM 1 = Non-directional
2 = Forward
3 = Reverse
Operation mode EFPADM 1 = Yo
2 = Go
3 = Bo
4 = Yo, Go
5 = Yo, Bo
6 = Go, Bo
7 = Yo, Go, Bo
Operate delay time EFPADM 60...200000 ms 10
Circle radius EFPADM 0.05...500.00 mS 0.01
Circle conductance EFPADM -500.00...500.00 mS 0.01
Circle susceptance EFPADM -500.00...500.00 mS 0.01
Conductance forward EFPADM -500.00...500.00 mS 0.01
Conductance reverse EFPADM -500.00...500.00 mS 0.01
Conductance tilt Ang EFPADM -30...30° 1
Susceptance forward EFPADM -500.00...500.00 mS 0.01
Susceptance reverse EFPADM -500.00...500.00 mS 0.01
Susceptance tilt Ang EFPADM -30...30° 1
Table 38. Wattmetric-based earth-fault protection (WPWDE)
Characteristic
Value
Operation accuracy Depending on the frequency of the measured current: f
n
±2 Hz
Current and voltage:
±1.5% of the set value or ±0.002 × I
n
Power:
±3% of the set value or ±0.002 × P
n
Start time
1)2)
Typically 63 ms
Reset time Typically 40 ms
Reset ratio Typically 0.96
Operate time accuracy in definite time mode ±1.0% of the set value or ±20 ms
Operate time accuracy in IDMT mode ±5.0% of the set value or ±20 ms
Suppression of harmonics -50 dB at f = n × f
n
, where n = 2,3,4,5,…
1) Io varied during the test. Uo = 1.0 × U
n
= phase to earth voltage during earth fault in compensated or un-earthed network. The residual power value before fault = 0.0 pu, f
n
= 50 Hz, results
based on statistical distribution of 1000 measurement.
2) Includes the delay of the signal output contact.
Line Differential Protection and Control
1MRS756500 K
RED615
Product version: 5.0 FP1
38 ABB