Table 28. Non-directional EF protection (EFxPTOC)
Operation
accuracy
Depending on the frequency of the current measured: f
n
±2Hz
EFLPTOC ±1.5% of the set value or ±0.002 x I
n
EFHPTOC
and
EFIPTOC
±1.5% of set value or ±0.002 x I
n
(at currents in the range of 0.1…10 x I
n
)
±5.0% of the set value
(at currents in the range of 10…40 x I
n
)
Start time
1) 2)
Minimum Typical Maximum
EFIPTOC:
I
Fault
= 2 x set Start value
I
Fault
= 10 x set Start value
16 ms
11 ms
19 ms
12 ms
23 ms
14 ms
EFHPTOC and EFLPTOC:
I
Fault
= 2 x set Start value 22 ms 24 ms 25 ms
Reset time < 40 ms
Reset ratio Typical 0.96
Retardation time < 30 ms
Operate time accuracy in definite time mode ±1.0% of the set value or ±20 ms
Operate time accuracy in inverse time mode ±5.0% of the theoretical value or ±20 ms
3)
Suppression of harmonics RMS: No suppression DFT: -50dB at f =
n x f
n
, where n = 2, 3, 4, 5,…
Peak-to-Peak: No suppression
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 Function Value (Range) Step
Start value EFLPTOC 0.010...5.000 x I
n
0.005
EFHPTOC 0.10...40.00 x I
n
0.01
EFIPTOC 1.00...40.00 x I
n
0.01
Time multiplier EFLPTOC 0.05...15.00 0.05
EFHPTOC 0.05...15.00 0.05
Operate delay time EFLPTOC 40...200000 ms 10
EFHPTOC 40...200000 ms 10
EFIPTOC 20...200000 ms 10
Operating curve type
1)
EFLPTOC Definite or inverse time
Curve type: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
11, 12, 13, 14, 15, 17, 18, 19
EFHPTOC Definite or inverse time
Curve type: 1, 3, 5, 9, 10, 12, 15, 17
EFIPTOC Definite time
1) For further reference please refer to the Operating characteristics table at the end of the Technical data chapter
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