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Input Specications/Output Specications/Measurement Specications
27. Power factor and displacement power factor measurement specications PF, DPF
Measurement method Power Factor: Calculated from apparent power S and active power P
Displacement Power Factor: Calculated according to fundamental wave active power
and reactive power (Data update: Every 1 s)
Lag phase (LAG: current lags more than the voltage): Positive
Lead phase (LEAD: current leads more than the voltage): Negative
Displayed items Power factor/Displacement power factor on each channel
Sum of values on multiple channels
(For details, see Calculation Formula.)
Display selection RMS calculation / fundamental wave calculation (Both of them are stored.)
28. Harmonic voltage and harmonic current measurement specications Uharm, Iharm
Measurement method Uses IEC61000-4-7 Ed2.1: 2009
Following the harmonic analysis, indicated added the harmonics components that are
adjacent to the integer order interharmonic components. (For details, see Calculation
Formula.)
Analysis window width 10 cycles/12 cycles
Window point count Rectangular 2 048 points
Displayed items From 0th to 50th order
Options for RMS and content percentage
For content percentage, when the RMS is 0, all orders should be set to 0%.
Measurement range • Harmonic voltage
RMS value: 1000.0 V
Content percentage: 100%
• Harmonic current
RMS value: Depends on the current sensor in use
Content percentage: 500%
Measurement accuracy • Voltage
Dened by the declared input voltage of 100 V to 440V
0th order: Same as Voltage DC value
1st order: Same as RMS voltage
2nd order or higher: ±10.0% rdg. when the value is more than 1% of the declared input
voltage, and the value should be ±0.05% of the declared input voltage when the value
is less than 1% of the declared input voltage.
• Current
0th order: same as Current DC value
1st to 20th order: ±0.5% rdg.±0.2% f.s. + (current sensor accuracy)
21st to 30th order: ±1.0% rdg.±0.3% f.s. + (current sensor accuracy)
31st to 40th order: ±2.0% rdg.±0.3% f.s. + (current sensor accuracy)
41st to 50th order: ±3.0% rdg.±0.3% f.s. + (current sensor accuracy)
(Note: While using 2000 A range of Model CT7742, f.s. tolerance should be 2.5 times
the value)