Fluke 434-II User Manual page 146

Fluke 434-II/435-II/437-II
Users Manual
Harmonics
Watt
VA
var
VA Harmonics
VA Unbalance
Power Factor
Cos ϕ
DPF
Energy / Energy Cost
Unbalance
Flicker
Transient capture
Inrush current
Mains Signaling
Time Synchronisation
27-8
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Calculated from 10/12-cycle gapless harmonic group measurements on
Voltage and Amps according to IEC 61000-4-7
Full and fundamental real power display. Calculates average value of
instantaneous power over 10/12 cycle period for each phase. Total Active
Power P = P + P + P .
T 1 2 3
Full and fundamental apparent power display. Calculates apparent power
using Vrms x Arms value over 10/12 cycle period.
Fundamental reactive power display. Calculates reactive power on
fundamental positive sequence components. Capacitive and inductive load is
indicated with capacitor and inductor icons.
Total disturbance power due to harmonics. Calculated for each phase and for
total system based upon total aparent power and fundamental real power.
Unbalance power for total sytem. Calculated using symetrical components
method for fundamental apparent power and total apparent power.
Calculated Watt / VA
Cosine of angle between fundamental voltage and current
Calculated fundamental Watt/VA
Power values are accumulated over time for kWh values.
Energy cost is calculated from user defined /kWh cost variable
The supply voltage unbalance is evaluated using the method of symmetrical
components according to IEC61000-4-30
According to IEC 61000-4-15 flickermeter—functional and design specification.
Includes 230 V / 50 Hz lamp and 120 V / 60 Hz lamp models.
Captures waveform triggered on signal envelope. Additionally triggers on dips,
swells, interruptions and Amps level as specified by IEC61000-4-30.
The inrush current begins when the Arms half cycle rises above the inrush
threshold, and ends when the Arms half cycle rms is equal to or below the
inrush threshold minus a user-selected hysteresis value.
The measurement is the square root of the mean of the squared Arms half
cycle values measured during the inrush duration.
Each half-cycle interval is contiguous and non-overlapping as recommended by
IEC 61000-4-30. Markers indicate inrush duration.
Cursors allow measurement of peak Arms half cycle.
Measurements are based on: either the corresponding 10/12-cycle rms value
interharmonic bin or the rms of the four nearest 10/12-cycle rms value
interharmonic bins per IEC 61000-4-30.
Limit setup for Monitor mode follows EN50160 standard limits.
Optional GPS430-II timesync module provides time uncertainty ≤ 20 ms or ≤
16.7 ms for time tagging of events and time aggregated measurements. When
synchronization is not available, time tolerance is ≤ 1 s/24h.
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