
3
3.9 STARTING CURRENTOROVERCURRENT(TRUE INRUSH) MEASUREMENT
.............................................................................................................................................29
3.10 POWER MEASUREMENTS W, VA, VAR,PFAND DPF ...........................................31
3.10.1 Measurement of single-phase power............................................................ 31
3.10.2 Balanced three-phase power measurement.................................................. 32
3.10.3Four quadrant diagram ............................................................................... 33
3.11 ENERGY METERINGMEASUREMENT ...................................................................34
3.12 FREQUENCYMEASUREMENT (HZ).........................................................................37
3.12.1 Frequency measurement in voltage.............................................................. 37
3.12.2 Frequency measurement in current.............................................................. 38
3.13 MEASUREMENT OF THE TOTALHARMONICDISTORTION (THD) AND
DISPLAYOF THE ORDERS OF HARMONICS..........................................................39
3.13.1 Measurement of the THD in voltage............................................................ 39
3.13.2 Measurement of the THD in current............................................................ 40
3.13.3 Display of the 25 orders of harmonics and of the frequency of the
fundamental ................................................................................................. 40
3.14 RECORDINGOF MEASUREMENTDATA/CAMPAIGNS .....................................41
3.15 PROCESSINGOF THEDATAON APCWITH THE PAT SOFTWARE.................42
4CHARACTERISTICS............................................................................................... 55
4.1 REFERENCE CONDITIONS .........................................................................................55
4.2 CHARACTERISTICSUNDER THE REFERENCE CONDITIONS..........................55
4.2.1 DC voltage measurement............................................................................. 55
4.2.2 AC voltage measurement ............................................................................. 56
4.2.3 AC+DC voltage measurement ..................................................................... 56
4.2.4 DC current measurement............................................................................. 57
4.2.5 AC current measurement ............................................................................. 57
4.2.6 AC+DC intensity measurement.................................................................... 58
4.2.7 True-Inrush measurement............................................................................ 58
4.2.8 Calculation of the crest factor (CF)............................................................. 59
4.2.9 Calculation of the RIPPLE in DC................................................................ 59
4.2.10 Continuity measurement .............................................................................. 59
4.2.11 Resistance measurement.............................................................................. 60
4.2.12 Active DC power measurements .................................................................. 60
4.2.13 Active AC power measurements................................................................... 61
4.2.14 Active AC+DC power measurements........................................................... 62
4.2.15 Measurement of apparent AC power ........................................................... 62
4.2.16 Measurement of apparent AC+DC power................................................... 63
4.2.17 Measurement of reactive AC power............................................................. 63
4.2.18 Measurement of reactive AC+DC power..................................................... 64
4.2.19 Calculation of the power factor (PF)........................................................... 64
4.2.20 Calculation of the displacement power factor (DPF).................................. 65
4.2.21 Frequency measurements............................................................................. 65
4.2.22 Characteristics in THDr .............................................................................. 66
4.2.23 Characteristics in THDf............................................................................... 66
4.2.24 Harmonic measurement characteristics....................................................... 67