Directional Earth-Fault Protection Defxpdef; Identification; Function Block - ABB RELION REX640 Technical Manual

1MRS759142 C
4.2.2
4.2.2.1
4.2.2.2
REX640
Technical Manual
Characteristic
1)
Start time
EFIPTOC
I
Fault
value
I
Fault
value
EFHPTOC and
EFLPTOC
I
Fault
value
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
Operate time accuracy in inverse time mode
Suppression of harmonics
Measurement mode = default (depends on stage), current before fault = 0.0 × I
1)
in one phase with nominal frequency injected from random phase angle, results based on statistical
distribution of 1000 measurements
2) Measured with static signal output (SSO)
3) Includes the delay of the signal output contact (SO)
Start value = 2.5 × I
4) Maximum

Directional earth-fault protection DEFxPDEF

Identification

Function description
Directional earth-fault protection, low
stage
Directional earth-fault protection, high
stage

Function block

GUID-9980487B-DA11-4847-88B6-C8957B8D8AFB V1 EN
Figure 221: Function block
Value
Minimum
2)
:
8 ms
= 2 × set Start
8 ms
Start
= 10 × set
23 ms
3)
:
Start
= 2 × set
Typically <40 ms
Typically 0.96
<30 ms
±1.0% of the set value or ±20 ms
±5.0% of the theoretical value or ±20 ms
RMS: No suppression
DFT: -50 dB at f = n × f
Peak-to-Peak: No suppression
Start value multiples in the range of 1.5...20
,
n
IEC 61850
identification
DEFLPDEF
DEFHPDEF
Section 4
Protection functions
Typical Maximum
11 ms 14 ms
9 ms 11 ms
26 ms 29 ms
, where n = 2, 3, 4, 5,...
n
, f = 50 Hz, fault current
n n
IEC 60617 ANSI/IEEE C37.2
identification device number
Io> -> 67G/N-1
51G/N-1
Io>> -> 67G/N-1
51G/N-2
4)
413