User Documentation

140
Devices – Energy Analyser 550
2008050000/03/02-2018
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4.4.3 Measurement
The Energy Analyser 550 has 4 measurement channels used to measure the current (I1..I4) and 4 measure-
ment channels used to measure the voltage (V1..V4 against Vref). Measured voltage and measured current
for the measurement channels 1-4 must derive from the same network.
• Baseline measurement
• The baseline measurement uses the measurement channels 1-3.
• Use the measurement channels 1-3 in three-phase systems.
• Supporting measurement
• The supporting measurement only uses measurement channel 4.
• Use measurement channel 4 when measuring in single-phase systems or in three-phase systems with
symmetrical loads.
• The frequency setting and the setting for the relevant voltage are pulled automatically from the baseline
measurement settings.
4.4.3.1 Half wave effective values
• A half wave effective value is a measurement value that corresponds with the formation of a full wave
over a measurement period.
• For half wave effective values, measurement results are generated every 10 ms (50 Hz) or every 8.3 Hz
(60 Hz).
• Half wave effective values CANNOT be used in Jasic programs.
• Calculated full wave effective values
• Voltage, UL1-N, UL2-N, UL3-N, UL4-N
• Current, IL1, IL2, IL3, IL4
• Calculation of the half wave effective values.
4.4.3.2 Base frequency
The Energy Analyser 550 operates in networks with base frequencies from 15 to 440 Hz.
Ifaxedbasefrequencyof50Hzor60HzhasbeensetintheEnergyAnalyser550,thenthevoltagequal-
itywillbemeasuredinaccordancewithEN61000-4-30ClassA,andickercalculatedinaccordancewith
EN 61000-4-15.
If automatic frequency recognition has been selected, voltage quality will be measured in accordance with
EN 61000-4-30 Class S (as there is no synchronisation of the 10 minute measurement windows), and no
ickeriscalculatedinaccordancewithEN61000-4-15.