DOCA0257EN-00

Current Imbalance

Description

The current imbalance function measures the maximum percentage of deviation between the average current and the individual phase currents.

The current imbalance measurement is based on imbalance ratio calculated from the following formulas:

Calculated measurement

Formula

If Iavg ≥ IFLC

If Iavg ≤ IFLC

Where
  • Iavg = Average RMS phase current

  • ILx = RMS current in the phase with maximum deviation from Iavg

  • IFLC = Motor full load current setpoint

NOTE: Current imbalance is not available in single-phase mode.

Characteristics

The current imbalance function has the following characteristics:

Characteristic

Value

Unit

%

Resolution

1%

Refresh interval

100 ms

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