| Power Recorder |
| Specifications for the System: Recorder and Power Analyze Software |
| |
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 |
| |
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 |
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