Hioki PQ3100 - Reactive Power Measurement Specifications; Energy and Energy Cost Measurement Specifications

165
Input Specications/Output Specications/Measurement Specications
24. Reactive power measurement specications Q
Measurement method RMS value calculation: Calculated from apparent power S and active power P
Fundamental wave calculation: Calculated from fundamental wave voltage and current.
Lag phase (LAG: current lags the voltage): Unsigned
Lead phase (LEAD: current leads the voltage): Negative
Displayed items Reactive power 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.)
Measurement range Depends on the voltage × current range combination (see Power range conguration
table)
Measurement accuracy During RMS calculation: ±1 dgt. for calculations derived from the various measured
values. (sum is ±3 dgt.)
During fundamental wave calculation: ±0.3% rdg.±0.1% f.s. + Current sensor
specications (reactive factor=1) in fundamental wave frequency of 45 Hz to 66 Hz
(Note: While using 2000 A range of Model CT7742, f.s. tolerance should be 2.5 times
the value)
Inuence of Reactive
Factors
(During fundamental
wave calculation)
1.0% rdg. or less (40 Hz to 70 Hz at a reactive factor of 0.5)
Phase difference between voltage and current of the internal circuit: ± 0.2865°
25. Active energy, reactive energy, apparent energy measurement specications
WP+, WP−; WQ_LAG, WQ_LEAD; WS
Measurement method Integrated from active power separately by consumption and regeneration
Integrated from reactive power separately by lag and lead
Integration from apparent power
Electric energy is measured from the start of recording
Data update: Every 1 s
Integration starts at the same time as the recording, and ends with the last TREND
update
Displayed items • Active energy
WP+ (consumption), WP- (regeneration)
Sum of values on multiple channels (For details, see Calculation Formula.)
• Reactive energy
WQ_LAG (lag), WQ_LEAD (lead)
Sum of values on multiple channels (For details, see Calculation Formula.)
• Apparent energy: WS
Sum of values on multiple channels (For details, see Calculation Formula.)
• Elapsed time
Measurement range Depends on the combination of voltage range, current range, and elapsed time. (See
Power range conguration table.)
Measurement accuracy Active energy: Active power measurement accuracy ±10 dgt.
Reactive energy: Reactive power measurement accuracy ±10 dgt.
Apparent energy: Apparent power measurement accuracy ±10 dgt.
Cumulative time accuracy: ±10 ppm±1 s (23°C [73°F])
26. Energy cost measurement specications Ecost
Measurement method Calculated by multiplying active energy (consumption) WP+ by the unit energy cost (per
kilowatt-hour).
Data update: Every 1 s
Displayed items Energy cost
Measurement accuracy ±1 dgt. relative to calculations from measured values
14
Specications