Camille Bauer LINAX PQ3000 Operating Instructions Manual

Also see for SINEAX AM2000: Operating instructions Device handbook

Contents

Camille Bauer LINAX PQ3000 Operating Instructions Manual Manual pdf 73 page image

PM 1001608 000 06 Device handbook LINAX PQ3000-PQ5000 73/90A2 Harmonic analysisThe harmonic analysis is performed according IEC 61000-4-7 over 10 cycles at 50Hz resp. 12 cycles at60Hz. If a measured quantity is available depends on the selected system.Measurementpresemax1L2L3Lb3Lu3Lu.A4LuTHD Voltage U1N/U ● ● √ √ √THD Voltage U2N ● ● √ √THD Voltage U3N ● ● √THD Voltage U12 ● ● √ √ √THD Voltage U23 ● ● √ √ √THD Voltage U31 ● ● √ √ √THD Current I1/I ● ● √ √ √ √ √ √THD Current I2 ● ● √ √ √ √THD Current I3 ● ● √ √ √TDD Current I1/I ● ● √ √ √ √ √ √TDD Current I2 ● ● √ √ √ √TDD Current I3 ● ● √ √ √Harmonic contents 2nd...50th U1N/U ● ● √ √ √Harmonic contents are availableup to the 89th (50Hz) or 75th(60Hz) on the Modbus interfaceHarmonic contents 2nd...50th U2N ● ● √ √Harmonic contents 2nd...50th U3N ● ● √Harmonic contents 2nd...50th U12 ● ● √ √ √Harmonic contents 2nd...50th U23 ● ● √ √ √Harmonic contents 2nd...50th U31 ● ● √ √ √Harmonic contents 2nd...50th I1/I ● ● √ √ √ √ √ √Harmonic contents 2nd...50th I2 ● ● √ √ √ √Harmonic contents 2nd...50th I3 ● ● √ √ √● Available via communication interface onlyHarmonicsHarmonics are multiples of the fundamental resp. system frequency. They arise if non-linear loads, suchas RPM regulated drives, rectifiers, thyristor controlled systems or fluorescent lamps are present in thepower system. Thus undesired side effects occur, such as additional thermal stress to operationalresources or electrical mains, which lead to an advanced aging or even damage. Also the reliability ofsensitive loads can be affected and unexplainable disturbances may occur. In industrial networks theimage of the harmonics gives good information about the kind of loads connected. See also:► Increase of reactive power due to harmonic currentsTDD (Total Demand Distortion)The complete harmonic content of the currents is calculated additionally as Total Demand Distortion,briefly TDD. This value is scaled to the rated current resp. rated power. Only this way it's possible toestimate the influence of the current harmonics on the connected equipment correctly.Maximum valuesThe maximum values of the harmonic analysis arise from the monitoring of THD and TDD. The maximumvalues of individual harmonics are not monitored separately, but are stored if a maximum value of THD orTDD is detected. The image of the maximum harmonics therefore always corresponds to the dedicatedTHD resp. TDD.The accuracy of the harmonic analysis strongly depends on the quality of the current and voltagetransformers possibly used. In the harmonics range transformers normally change both, theamplitude and the phase of the signals to measure. It's valid: The higher the frequency of theharmonic, the higher its damping resp. phase shift.