
3
3.9 STARTING CURRENTOROVERCURRENT(TRUE INRUSH) MEASUREMENT
.............................................................................................................................................31
3.10 POWER MEASUREMENTS W, VA, VAR,PF AND DPF ...........................................33
3.10.1 Measurement of single-phase power............................................................ 33
3.10.2 Balanced three-phase power measurement.................................................. 34
3.10.3 Four quadrant diagram ............................................................................... 35
3.11 ENERGY METERINGMEASUREMENT...................................................................36
3.12 FREQUENCYMEASUREMENT(HZ).........................................................................39
3.12.1 Frequency measurement in voltage.............................................................. 40
3.12.2 Frequency measurement in current.............................................................. 41
3.13 MEASUREMENT OF THE TOTALHARMONICDISTORTION (THD) AND
DISPLAYOF THE ORDERS OF HARMONICS..........................................................41
3.13.1 Measurement of the THD in voltage............................................................ 41
3.13.2 Measurement of the THD in current ............................................................ 42
3.13.3 Display of the 25 orders of harmonics and of the frequency of the
fundamental ................................................................................................. 43
3.14 RECORDINGOF MEASUREMENTDATA/CAMPAIGNS .....................................44
3.15 PROCESSINGOF THE DATA ONAPCWITH THE PAT SOFTWARE.................44
4CHARACTERISTICS............................................................................................... 58
4.1 REFERENCE CONDITIONS .........................................................................................58
4.2 CHARACTERISTICSUNDER THE REFERENCE CONDITIONS..........................58
4.2.1 DC voltage measurement............................................................................. 58
4.2.2 AC voltage measurement ............................................................................. 59
4.2.3 AC+DC voltage measurement..................................................................... 59
4.2.4 DC current measurement............................................................................. 60
4.2.5 AC current measurement ............................................................................. 61
4.2.6 AC+DC intensity measurement.................................................................... 61
4.2.7 True-Inrush measurement............................................................................ 62
4.2.8 Calculation of the crest factor (CF)............................................................. 62
4.2.9 Calculation of the RIPPLE in DC................................................................ 62
4.2.10 Continuity measurement .............................................................................. 63
4.2.11 Resistance measurement.............................................................................. 63
4.2.12 Active DC power measurements .................................................................. 64
4.2.13 Active AC power measurements................................................................... 64
4.2.14 Active AC+DC power measurements........................................................... 66
4.2.15 Measurement of apparent AC power ........................................................... 66
4.2.16 Measurement of apparent AC+DC power................................................... 67
4.2.17 Measurement of reactive AC power............................................................. 67
4.2.18 Measurement of reactive AC+DC power..................................................... 68
4.2.19 Calculation of the power factor (PF)........................................................... 69
4.2.20 Calculation of the displacement power factor (DPF).................................. 69
4.2.21 Frequency measurements............................................................................. 70
4.2.22 Characteristics in THDr .............................................................................. 70
4.2.23 Characteristics in THDf............................................................................... 71
4.2.24 Harmonic measurement characteristics....................................................... 71