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Power Recorder
Specifications for the System: Recorder and Power Analyze Software
51
Transient Voltage (Impulse)
Measurement Type............................................. Waveshape sampling, not peak detect
Full Scale............................................................ 8000 V pk
Sample Resolution.............................................. 200 nS
Measurement Uncertainty................................... ± 5 % reading ± 20 V (test parameters: 1000 V dc, 1000 V rms,
100 kHz)
Dip (Sag) and Swell Measurements
Voltage Swell (rms swell)
Measurement Type............................................. True rms (one cycle calculation by overlapping each half cycle)
(voltage between lines is measured for 3P3W lines and phase voltage
is measured for 3P4W lines)
Displayed Data ................................................... Amplitude and duration of swell
Measurement Accuracy ...................................... Same as rms voltage
Voltage Dip (RMS sag)
Measurement Type............................................. True rms (one cycle calculation by overlapping each half cycle)
(voltage between lines is measured for 3P3W lines and phase voltage
is measured for 3P4W lines)
Displayed Data ................................................... Amplitude and duration of dip or interruption
Measurement Accuracy ...................................... Same as rms voltage
Voltage Dropout (Interruption)
Measurement Type............................................. Same as Voltage Dip
Power and PF Measurement
Calculated per IEEE1459 for best performance when distortions exist
Measurement Type............................................. True rms calculated continuously: every cycle, and every 10 or 12
cycles at 50 or 60 Hz respectively, as required by standards
Measurement Accuracy ...................................... ± 0.2 % reading ± 0.1 % full scale + current sensor accuracy
Frequency
Measurement Range .......................................... 42.5 to 69 Hz
Measurement Source ......................................... Same as PLL synchronization source
Measurement Accuracy ...................................... ± 10 mHz (10 to 110 % of range, with sine wave)
Reactive Power
Accuracy............................................................. ± 0.2% reading ± 0.1 % full scale + current sensor accuracy
Power Factor
Measurement Range .......................................... -1.000 (leading) to 0.000 to +1.000 (lagging)
Measurement Accuracy ...................................... ± 1 digit from the calculation of each measured value (± 3 digits for
total)
Displacement Power Factor
Measurement Method......................................... Calculated from the phase difference between voltage fundamental
and current fundamental
Measurement Range .......................................... -1.000 (leading) to 0.000 to + 1.000 (lagging)
Measurement Accuracy ...................................... ± 0.5 % reading ± 2 % full scale ± 1 digit
Voltage Unbalance and Phase Sequence
Measurement Method......................................... Positive sequence voltage divided by negative sequence voltage, per
IEC 61000-4-30
Harmonic Voltage and Current
Analysis Window................................................. rectangular
Analysis Order .................................................... 1st to 50th order
Measurement Accuracy ...................................... Voltage / Current: 1st to 20th orders: ± 0.5 % reading ± 0.2 % full scale
21st to 50th orders: ± 1 % reading ± 0.3 % full scale (current sensor
accuracy must be included for current and power)
Measurement Method......................................... IEC 61000-4-7:2002
Inter-harmonic Voltage and Current (Intermediate Harmonics)
Analysis Window................................................. rectangular
Analysis Orders .................................................. 0.5 to 49.5th order
Measurement Method......................................... IEC 61000-4-7:2002
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