13.2 Input Specifications/Output Specifications/Measurement Specifications
196
(2) Frequency cycle (Freq_wav)
Measurement method Reciprocal method
Calculated as the reciprocal of the accumulated wh
ole-cycle time during one U1 (reference chan-
nel) cycle.
Frequency is given per waveform.
When set to a measurement frequency of 400 Hz, calculated
as the reciprocal of the accumulated
whole-cycle time during 8 cycles.
Average frequency is given for 8 waveforms.
Displayed item Worst frequency cycle value between EVENT IN and EVENT OUT (max. deviation).
Measurement range When the measurement frequency is set to 50 Hz/60 Hz :70.000 Hz
When the measurement frequency is set to 400 Hz : 440.00 Hz
Measurement accuracy When the measurement frequency is set to 50 Hz/60 Hz:
±0.200 Hz or
less (for input from 10% f.s. to 110% f.s.)
When the measurement frequency is set to 400 Hz:
±2.00 Hz or less (for input from 10% f.s. to 110% f.s.)
Event threshold Specified as deviation of 0.1 Hz to 9.9 Hz in 0.1 Hz increments.
Event IN The time when the waveform exceeded the positive threshold or fallen below the negative thresh-
old for the first time
Event OUT The time when the waveform returned to the range between the negative threshold plus 0.1 Hz
and the positive threshold minus 0.1 Hz
Note: Equivalent to 0.1 Hz frequency hysteresis.
Multiple-phase system treatment None
Saved waveforms Event waveforms
(3) RMS voltage refreshed each half-cycle (Urms1/2)
Measurement method True RMS type, compliant with IEC61000-4-30
When the measurement frequency is set to 50 Hz/60 Hz, RMS voltage values are calculated using
sample data for 1 waveform derived by overlapping the voltage waveform every half-cycle. When
the measurement frequency is set to 400 Hz, the RMS voltage value is calculated for each voltage
waveform. The line voltage is used for 3-phase 3-wire (3P3W3M) connections, while the phase
voltage is used for 3-phase 4-wire connections.
Displayed item RMS voltage refreshed each half-cycle
Measurement range 600.00 V
Measurement accuracy When the measurement frequency is set to 50 Hz/60 Hz:
With 10 V to 660 V input:
Specified as 0.2% of nominal voltage with a nominal input voltage (
Udin) of at least 100 V.
With input outside the range of 10 V to 660 V or a nominal input voltage (Udin) of less than 100 V:
±0.2% rdg. ±0.08
% f.s.
When the measurement frequency is set to 400 Hz: ±0.4% rdg.±
0.50% f.s.
Event threshold See the Dip, Swell, and Interruption sections.
Event IN See the Dip, Swell, and Interruption sections.
Event OUT See the Dip, Swell, and Interruption sections.
Multiple-phase system treatment None
Saved waveforms None
Constraints With a 400 Hz measurement frequency, measured values recorded on the event voltage fluctua-
tion graph consist of RMS voltage values for each waveform.
To Next Page
Loading...
