12.2 Measurement Specifications
189
Reactive Power
Measurement method
Calculated using apparent power S and active power P.
Display item
Reactive power of each channel and its sum for multiple channels. (For de-
tails, see the formula.(page 202))
Measurement range
Depends on the voltage x current range combination. (See the power range
configuration table (page 193).)
Measurement accuracy
±1 dgt. for calculations derived from the various measurement values. (sum
is ±3 dgt.)
Polarity display
For phase lag (LAG: current is slower than voltage): no symbol
For lead phase (LEAD: current is faster than voltage): "-"
Power Factor
Measurement method
Calculated from RMS voltage U, RMS current I, and active power P.
Display item
Power factor of each channel or its sum for multiple channels. (For details,
see the formula.(page 202))
Measurement range
-1.000 (lead) to 0.000 to +1.000 (lag)
Measurement accuracy
±1 dgt. for calculations derived from the various measurement values. (sum
value is ±3 dgt.)
Polarity display
For phase lag (LAG: current is slower than voltage): no symbol
For lead phase (LEAD: current is faster than voltage): "-"
Displacement Power Factor
Measurement method
Calculated from the phase difference between the fundamental voltage
wave and the fundamental current wave.
Display item
Displacement power factor of each channel and its sum value for multiple
channels. (For details, see the formula.(page 203))
Measurement range
-1.000 (lead) to 0.000 to +1.000 (lag)
Measurement accuracy
At 50/60 Hz measurement, ±0.5% rdg. ±0.2% f.s. ±1 dgt. (sum value is ±3 dgt.)
At 400 Hz measurement, ±0.5% rdg. ±0.6% f.s. ±1 dgt. (sum value is ±3 dgt.)
Polarity display
For phase lag (LAG: current is slower than voltage): no symbol
For lead phase (LEAD: current is faster than voltage): "-"
Voltage Unbalance Factor
Measurement method
Calculated using various components of the three-phase fundamental volt-
age wave (line-to-line voltage) for three-phase 3-wire (3P3W3M) and three-
phase 4-wire connections. (For details, see the formula. (page 203))
Total display area
0.00% to 100.00%
Current Unbalance Factor
Measurement method
Calculated using various components of the three-phase fundamental cur-
rent wave (line-to-line current) for three-phase 3-wire (3P3W3M) and three-
phase 4-wire connections. (For details, see the formula. (page 204))
Display range
0.00% to 100.00%
K Factor (multiplication factor)
Measurement method
Calculated using the harmonic RMS current of the 2nd to 50th orders. (For
details, see the formula. (page 206))
Display range
0.00 to 500.00
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