TAVRIDA ELECTRIC Rec15, Technical Manual

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51
Frequency measured from Source
– side
13
, Hz F- 40-60 at 50Hz
40-70 at 60Hz 0.01 Hz
 
Single-phase power factor PFa, PFb, PFc -1
… 1
0.01

Three-phase power factor PF3ph -1
… 1
0.01

Phase-to-earth voltages measured from side, kV Ua+, Ub+, Uc+
0 … 30
0.1 kV

Phase-to-earth voltages measured from Source - side, kV Ua-, Ub-, Uc-
0 … 30
0.1 kV

Phase-to-phase voltages measured from side, kV Uab+, Ubc+, Uac+
0 … 30
0.1 kV

Phase-to-phase voltages measured from Source - side, kV Uab-, Ubc-, Uac- 0
… 30
0.1 kV

Positive sequence active power, kW P1 -65535
…
65535
1 kW

Single-phase active power, kW Pa, Pb, Pc -
65535 …
65535
1 kW

Three-phase active power, kW P3ph -
65535 …
65535
1 kW

Single-phase reactive power, kVAr Qa, Qb, Qc -
65535 …
65535
1 kVAr

Three-phase reactive power, kVAr Q3ph -
65535 …
65535
1 kVAr

Single-phase active energy, kWh Wa, Wb, Wc
0 … 9999999
1 kWh

Three-phase active energy, kWh W3ph
0 … 9999999
1 kWh

Single-phase reactive energy, kVArh Ea, Eb, Ec
0 … 9999999
1 kVArh

Three-phase reactive energy, kVArh E3ph
0 … 9999999
1 kVArh

Phase angle difference between U1+ and U1-, degrees PhAngDifU1
0 … 180 or
“Undefined”
1 degree

Angle between Un and In, degrees An -
179 … 180 or
“Undefined”
1 degree
 
Signal filtering effectively rejects higher harmonics. Phase current measuring channels are additionally
equipped with inrush filters.
Inrush Filter
Reclosers described in the current product guide incorporate a unique inrush filter. This allows filtering of
magnetizing currents occurring at energizing transformers or distribution feeders with step-down-transformers.
In contrast to the widely used inrush restraint, which blocks the operation of protection for the period of inrush,
the filter leaves all protection active and sensitive to faults for the whole period of line energizing.
The advantages are:
•
This feature makes it possible to select the settings of current-based protection elements based on actual
load and fault levels, not considering any side effects due to transformer load energizing;
•
If, after maintenance closing or performing backfeed restoration for a faulty feeder part, the fault clearing
time is significantly reduced as all protection elements operate correctly without any delays.
Figure 26 and Figure 27 demonstrate the comparison of current measurement results at load energizing
captured by the recloser without and with inrush filter enabled.
Figure 26
Basic frequency phase currents RMS. No inrush filter applied