51
—
Table 64. Three-phase thermal protection for feeders, cables and distribution transformers (T1PTTR) main settings
Parameter Function Value (range) Step
Env temperature Set
Current reference
n
Temperature rise
Time constant
Maximum temperature
Alarm value
Reclose temperature
Current multiplier
Initial temperature
—
Table 65. High-impedance differential protection (HIxPDIF)
Characteristic Value
Operation accuracy
Depending on the frequency of the measured current: f
n
n
Start time
Minimum Typical Maximum
I
Fault
I
Fault
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
n
, f
n
= 50 Hz, 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
—
Table 63. Three-phase thermal protection for feeders, cables and distribution transformers (T1PTTR)
Characteristic Value
Operation accuracy
Depending on the frequency of the measured current: f
n
n
(at currents
n
)
Operate time accuracy
—
Table 62. Frequency protection (FRPFRQ) main settings
Parameter Function Value (range) Step
Operation mode FRPFRQ
-
Start value Freq> FRPFRQ
n
Start value Freq< FRPFRQ
n
FRPFRQ
n
Operate Tm Freq FRPFRQ
FRPFRQ
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