5
5.1.3 Flexible current probes ...........................................................................................106
5.2 Flicker .............................................................................................................107
5.3 Power measurement.......................................................................................107
5.3.1 Active power...........................................................................................................108
5.3.2 Reactive power.......................................................................................................108
5.3.3 Reactive power and three-wire systems..................................................................111
5.3.4 Reactive power and reactive energy meters ...........................................................112
5.3.5 Apparent power ......................................................................................................113
5.3.6 Distortion power DBand effective nonfundamental apparent power SeN ..................114
5.3.7 Power Factor..........................................................................................................115
5.4 Harmonics.......................................................................................................115
5.4.1 Harmonics characteristics in three-phase systems..................................................117
5.4.2 THD........................................................................................................................118
5.5 Unbalance.......................................................................................................118
5.6 Detection of voltage dips, swells and interruptions..........................................120
5.7 CBEMA and ANSI curves................................................................................121
5.8 Averaging the measurement results................................................................123
6Technical specification ......................................................................... 125
6.1 Inputs ..............................................................................................................125
6.2 Sampling and real time clock ..........................................................................126
6.3 Measured parameters –accuracy, resolution and ranges ..............................126
6.3.1 Reference conditions..............................................................................................126
6.3.2 Measurement uncertainty within rated temperature range.......................................126
6.3.3 Voltage...................................................................................................................127
6.3.4 Current ...................................................................................................................127
6.3.5 Frequency ..............................................................................................................128
6.3.6 Harmonics ..............................................................................................................128
6.3.7 Power and energy...................................................................................................128
6.3.8 Estimating the uncertainty of power and energy measurements..............................129
6.3.9 Flicker.....................................................................................................................131
6.3.10 Unbalance..............................................................................................................131
6.4 Event detection –voltage and current RMS....................................................131
6.4.1 Event detection hysteresis......................................................................................131
6.5 Recording........................................................................................................132
6.6 Power supply...................................................................................................133
6.7 Supported mains types ...................................................................................133
6.8 Supported current probes ...............................................................................134
6.9 Communication...............................................................................................134
6.10 Environmental conditions and other technical data.........................................134
6.11 Safety and electromagnetic compatibility........................................................135
6.12 Standards........................................................................................................135
7Accessories............................................................................................ 136
7.1 Standard equipment........................................................................................136
7.2 Optional accessories.......................................................................................136
7.2.1 C-4(A) probes.........................................................................................................139
7.2.2 C-5(A) probes.........................................................................................................140
7.2.3 C-6(A) probes.........................................................................................................142
7.2.4 C-7(A) probes.........................................................................................................144
7.2.5 Probes F-1(A), F-2(A), F-3(A).................................................................................145
