Loading ...
Loading ...
Loading ...
Operation
Methods of Measurement/Formulas 3
3-13
Associated PC Software Settings:
messsystem4.bmp
Note
The power quality assessment according to EN50160 can be performed for
the phase-to-phase voltages of system 1 and system 2 respectively; the
preset limit values apply to both evaluations.
We have to enter the phase-to-phase voltage as the rated voltage V
N
in
‘Settings – Nominal/Limit Values’ (e.g. 400 V in the 230 V P-N network).
Methods of Measurement/Formulas
Parameter Aggregation
Signal Sampling
The device samples measurement signals at a nominal frequency of 10.24 kHz at nominal
power frequencies of 50 Hz and 60 Hz respectively.
The sampling frequency is synchronized to the power frequency on the reference channel
CH1, the signal level has to be at least 10 % of the input range. The required PLL (Phase
Locked Loop) is realized in the firmware of the instrument.
The synchronization range is according to IEC 61000-4-30 class A:
• Range for 50 Hz systems: 50 Hz ±15 % (42.5 Hz - 57.5 Hz)
• Range for 60 Hz systems: 60 Hz ±15 % (51 Hz - 69 Hz)
• Resolution: 16 ppm
Aggregations
The time aggregation2:02:05 PM of the measurement values is according to IEC 61000-
4-30 class A, section 4.5 based on 10/12 cycle values (10 cycles for 50 Hz and 12 cycles
for 60 Hz nominal frequency).
The following time aggregations are available:
• Half cycle, full cycle updated every half cycle, 200 ms (precisely: 10/12 cycle
values), 3 s (precisely: 150/180 cycles), 10 minutes, 2 hours, Free interval ( ≥ 10
seconds)
• Half cycle and full cycle values are based on the zero crossings of the
fundamental
1.888.610.7664 sales@GlobalTestSupply.com
Fluke-Direct.com
Loading ...
Loading ...
Loading ...