Directional Earth-Fault Protection (F)Defxpdef - ABB RELION REC615 Technical Manual

Protection functions
Table 336: (F)EFLPTOC Technical revision history
Technical revision
B
C
D
E
F
G
4.2.2

Directional earth-fault protection (F)DEFxPDEF

4.2.2.1 Identification
Function description
Directional earth-fault protection,
low stage
Directional earth-fault protection,
high stage
4.2.2.2 Function block
Io
Uo
I
U
BLOCK
ENA_MULT
RCA_CTL
Figure 140: Function block
4.2.2.3 Functionality
The earth-fault function (F)DEFxPDEF is used as directional earth-fault protection
for feeders.
The function starts and operates when the operating quantity (current) and
polarizing quantity (voltage) exceed the set limits and the angle between them
is inside the set operating sector. The operate time characteristic for low stage
(F)DEFLPDEF and high stage DEFHPDEF can be selected to be either definite time
(DT) or inverse definite minimum time (IDMT).
294
FDEFLPDEF
OPERATE
START
2
2
Change
The minimum and default values changed to
40 ms for the
Start value step changed to 0.005
Added a setting parameter for the "Measured
Io" or "Calculated Io" selection
Step value changed from 0.05 to 0.01 for the
Time multiplier setting
Internal improvement
Internal improvement
IEC 61850 IEC 60617
identification identification
(F)DEFLPDEF Io> ->
DEFHPDEF Io>> ->
DEFHPDEF
OPERATE
Io
Uo START
I
2
U
2
BLOCK
ENA_MULT
RCA_CTL
1MRS758755 C
Operate delay time setting
ANSI/IEEE C37.2
device number
67N-1
67N-2
REC615 & RER615
Technical Manual