13.2 Input Specifications/Output Specifications/Measurement Specifications
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13
Chapter 13 Specifications
(17) Active power (P)
Measurement method Measured every 10 cycles (50 Hz) or 12 cycles (60 Hz) (approx. 200 ms).
During 400 Hz measurement, measured every 80 cycles using the 8-cycle waveform (approx. 200
ms).
Displayed item Active power for each channel and sum value for multiple channels
(for more information, see "13.8 Calculation Formula" (p.231))
Sink (consumption) : Unsigned
Source (regeneration) : Negative
Measurement range Combination of voltage × current range (see "13.9 Range Breakdown and Combination Accuracy"
(p.244)
)
Measurement accuracy DC: ±0.5% rdg. ±0.5% f.s. + current sensor accuracy (defined for CH4 only)
AC:
When the measurement frequency is set to 50 Hz/60 Hz:
±0.2% rdg.±0.1% f.s. + current sensor accuracy (The sum value
is the total value for channels be-
ing used.)
When the measurement frequency is set to 400 Hz:
±0.4% rdg.±0.6% f.s. +current sensor accuracy (The sum value is the
total value for channels be-
ing used.)
Effects of power factor 1.0% rdg. or less (with power factor of 0.5)
Phase difference between internal circuit voltage and current: ±0.2865°
Event threshold Comparison of power range absolute values
Event IN Start of approx. 200 ms aggregation in which the absolute value was greater than the threshold
Event OUT Start of approx. 200 ms aggregation in which the reading was less than (threshold - hysteresis)
following the EVENT IN state
Multiple-phase system treatment Separate by channel
Saved waveforms Event waveforms
(18) Efficiency (Eff)
Measurement method Calculated based on the ratio of channels' respective active power values
(For more information, see "13.8 Calculation Formula" (p.231)
)
Displayed item Eff1, Eff2
Measurement range 0.00 to 200.00[%]
Measurement accuracy ±1 dgt. for calculations derived from the various measurement values.
Event threshold N/A
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