43
—
Table 34. Three-phase non-directional overcurrent protection (PHxPTOC)
Characteristic Value
Operation accuracy
EFLPTOC
n
EFHPTOC
and
EFIPTOC
n
n
)
n
)
Start time
Minimum Typical Maximum
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
RMS: No suppression
n
Peak-to-Peak: No suppression
n
, f
n
= 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
1) For further reference, see the Operation characteristics table
—
Table 35. Non-directional earth-fault protection (EFxPTOC) main settings
Parameter Function Value (range) Step
Start value
EFLPTOC
n
EFHPTOC
n
EFIPTOC
n
Time multiplier EFLPTOC and EFHPTOC
Operate delay time
EFLPTOC and EFHPTOC
EFIPTOC
EFLPTOC
Definite or inverse time
EFHPTOC
Definite or inverse time
EFIPTOC Definite time
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