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Power Recorder
Specifications for the System: Recorder and Power Analyze Software
51
Voltage and Current Measurement Accuracy
RMS Voltage
Measurement Type............................................. True rms calculated continuously: every cycle, every 1/2 cycle, and
every 10 or 12 cycles at 50 or 60 Hz respectively, as required by IEC
61000-4-30.
Measurement Uncertainty................................... AC: ± 0.2 % reading ± 0.1 % full scale above 50 V rms
DC: ± 0.5 % reading ± 0.2 % full scale above 50 V dc
If the ac component of a dc signal is below 40 V rms, the dc
uncertainty specification may have an offset.
RMS Current
Measurement Type............................................. True rms calculated continuously: every cycle, every 1/2 cycle, and
every 10 or 12 cycles at 50 or 60 Hz respectively, as required by
standards
Measurement Uncertainty................................... ± (0.1 % full scale + 0.5 % reading + current sensor accuracy, valid for
5 % to 100 % of current sensor range
Current Accuracy ................................................Ferromagnetic Clamps
± (0.1 % full scale + 0.2 % reading + current sensor accuracy), valid for
5 % to 100 % of current sensor range
Flexible Current Probes
± (0.1 % full scale + 0.5 % reading + current sensor accuracy), valid for
5 % to 100 % of current sensor range
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