Non-Directional Earth-Fault Protection (Efxptoc); Non-Directional Earth-Fault Protection (Efxptoc) Main Settings - ABB REX640 Product Manual

REX640
Product version: 1
Table 56. Non-directional earth-fault protection (EFxPTOC)
Characteristic
Operation accuracy
Start time 1)
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)
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 Start value multiples in the range of 1.5...20
4) Maximum ,
n
Table 57. Non-directional earth-fault protection (EFxPTOC) main settings
Parameter
Start value
Time multiplier
Operate delay time
1)
Operating curve type
1) For further reference, see the Operation characteristics table
46
EFLPTOC
EFHPTOC
and
EFIPTOC
2)
EFIPTOC :
Start value
I = 2 × set
Fault
Start value
I = 10 × set
Fault
3)
EFHPTOC and EFLPTOC :
Start value
I = 2 × set
Fault
, f = 50 Hz, fault current in one phase with nominal frequency injected from random phase angle, results based
n n
Function
EFLPTOC
EFHPTOC
EFIPTOC
EFLPTOC and EFHPTOC
EFLPTOC and EFHPTOC
EFIPTOC
EFLPTOC
EFHPTOC
EFIPTOC
Value
Depending on the frequency of the measured current: f
±1.5% of the set value or ±0.002 × I
±1.5% of the set value or ±0.002 × I
(at currents in the range of 0.1...10 × I
±5.0% of the set value
(at currents in the range of 10...40 × I
Minimum Typical
8 ms 11 ms
8 ms 9 ms
23 ms 26 ms
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 , where n = 2, 3, 4, 5,...
n
Peak-to-Peak: No suppression
Value (Range)
0.010...5.000 × I
n
0.10...40.00 × I
n
1.00...40.00 × I
n
0.025...15.000
40...300000 ms
20...300000 ms
Definite or inverse time
Curve type: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 18, 19
Definite or inverse time
Curve type: 1, 3, 5, 9, 10, 12, 15, 17
Definite time
1MRS759144 A
±2 Hz
n
n
n
)
n
)
n
Maximum
14 ms
11 ms
29 ms
4)
Step
0.005
0.01
0.01
0.005
10
10
ABB