Non-Directional Ef Protection (Efxptoc); Non-Directional Ef Protection (Efxptoc) Main Settings - ABB REF615 Product Manual

Feeder Protection and Control
REF615
Product version: 2.0
Table 28. Non-directional EF protection (EFxPTOC)
Operation Depending on the frequency of the current measured: f
accuracy
EFLPTOC
EFHPTOC
and
EFIPTOC
Start time 1) 2)
EFIPTOC:
I
Fault
I
Fault
EFHPTOC and EFLPTOC:
I
Fault
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
Operate time accuracy in inverse time mode
Suppression of harmonics
1) Measurement mode = default (depends on stage), current before fault = 0.0 x In, fn = 50 Hz, earth-fault current
with nominal frequency injected from random phase angle, results based on statistical distribution of 1000
measurements
2) Includes the delay of the signal output contact
3) Maximum Start value = 2.5 x In, Start value multiples in range of 1.5 to 20
Table 29. Non-directional EF protection (EFxPTOC) main settings
Parameter
Start value
Time multiplier
Operate delay time
Operating curve type
1)
1) For further reference please refer to the Operating characteristics table at the end of the Technical data chapter
26
= 2 x set Start value
= 10 x set Start value
= 2 x set Start value
Function
EFLPTOC
EFHPTOC
EFIPTOC
EFLPTOC
EFHPTOC
EFLPTOC
EFHPTOC
EFIPTOC
EFLPTOC
EFHPTOC
EFIPTOC
±1.5% of the set value or ±0.002 x I
±1.5% of set value or ±0.002 x I
(at currents in the range of 0.1...10 x I
±5.0% of the set value
(at currents in the range of 10...40 x I
Minimum Typical
16 ms 19 ms
11 ms 12 ms
22 ms 24 ms
< 40 ms
Typical 0.96
< 30 ms
±1.0% of the set value or ±20 ms
±5.0% of the theoretical value or ±20 ms
3)
RMS: No suppression DFT: -50dB at f =
n x f , where n = 2, 3, 4, 5,...
n
Peak-to-Peak: No suppression
Value (Range)
0.010...5.000 x I
n
0.10...40.00 x I
n
1.00...40.00 x I
n
0.05...15.00
0.05...15.00
40...200000 ms
40...200000 ms
20...200000 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
1MRS756379 D
±2Hz
n
n
n
)
n
)
n
Maximum
23 ms
14 ms
25 ms
Step
0.005
0.01
0.01
0.05
0.05
10
10
10
ABB