Low Frequency Measuring Test System
12Pages

Emission Measurements Low Frequency Measuring System Brief Overview of Phenomena . . Applicable Standards . . . . . . . . . . . . . . . . . . . 3 Test System Overview . . Generator Specifications . . EMC PARTNER’s Product Range . . . . . . . . . . . . . . 11 Emission Measurements: LF Measuring System

Brief Overview of Phenomena Low Frequency (LF) Measuring System measures and simulates disturbances in the 230V/50Hz and 115V/60Hz public power supplies. The following phenomena can be tested: Emission - Harmonics The increasing use of electronic equipment fitted with switch mode power supplies has led to an increase in distortion of the public power supply. Such loads draw non sinusoidal current, which contains harmonic frequencies at multiples of the 50Hz and 60Hz supply frequencies. This can lead to significant currents flowing in the neutral conductor resulting in cable and transformer...

Applicable Standards International Electrotechnical Committee (IEC) IEC 61000-3-2 (Ed.3.2: 2009): Limits - Limits for harmonic current emissions (equipment input current <= 16 A per phase) IEC 61000-3-3 (Ed.2.0: 2008): Limits - Limitation of voltage changes, voltage fluctuations and flicker in public low-voltage supply systems, for equipment with rated current <= 16 A per phase and not subject to conditional connection IEC 61000-4-7 (Ed.2.1: 2009): Testing and measurement techniques - General guide on harmonics and interharmonics measurements and instrumentation, for power supply systems...

Test System Overview Test System Features LF Measuring System has many unique and outstanding features: - Utilises public power main - Light weight and transportable - Unique power amplifier design (patent pending) - 4000VA rated system - 250V maximum EUT supply - 16A per phase maximum EUT current - Power source continuously monitored for compliance - Discrete components for flicker impedance - Flicker measurements Pst and Plt - dmax measurements - Automatic Pass/Fail indication - Powerful analysis software - Lower cost solution compared to conventional systems - System verification...

System Components The Low Frequency measuring system is a compact solution to determine harmonic and flicker emissions generated by equipment connected to the public power main. HAR1000-1P is the single phase version and comprises a power amplifier, line impedance network, harmonics and flicker measurement, all in a single unit. HAR-EXT1000 added to HAR1000-1P provides full three phase capability. The hardware is controlled from a powerful user interface software (HARCS). Power Amplifier Using a novel technique to correct power main distortion reduces size, weight and cost compared to...

Harmonic Measurement System Definition of the equipment classes This can be configured to measure in accordance with the latest standard require- ments (including amendment 14) and also the previous version. Providing an easy comparison of measurement results obtained from previous and new samples. Dual analysers simultaneously monitor the AC supply output and the distortion resulting from the EUT. Both voltage and current harmonics are measured and displayed for analysis purposes in Altai tunc* tmt sitfwu ui* Gr|H alf I <._>_A|V| ♦] ►.III HflnniFntan | fVtwf iwaan | I'v.w*.- r«,t*> j...

Flicker Measurement System The flicker analyser is a part of the system hardware and is compliant to the latest requirements of IEC61000-4-15. Specifically this means that dmax is the result of an average from 22 measurements taken from a total of 24. Verification of the flicker measurement system can be made using 33.3Hz modulation for 50Hz and also 40Hz modulation for60Hz supplies. The inrush current capability enables measurement of IdudlUm Ifta II.Ill SHniiami FbkAf i.Pni: nji.r Graphic representation of cumulative prob- ability function. The real time flicker value is displayed...

HARCS Recorder. Up to 8 different measure- ment parameters can be stored in the record- er. When a test is completed, data from the recorder can be "re-run" to assist in analysis HARCS ANASIM. Included in the HARCS pack- age is the simulation program ANASIM. Verification. Perform a quick system verifica- tion for harmonics and flicker using internally generated signals. Harmonic Simulation Emission Measurements: LF Measuring System

Generator Specifications Power Amplifier Power rating Amplifier bandwidth Voltage range (230V) Voltage range (115V) Continuous current Usable supply frequencies Inrush current Load change regulation Total Harmonic Distortion (THD) Response time 0 to 100% load change Voltage harmonic distortions Source impedance Harmonic Measurement System Current and Voltage harmonic range Harmonic class measurements Frequency measurement accuracy Voltage drop across current shunt Current ranges Current measurement accuracy Parameter measurement and display FFT of EUT current Fluctuationg harmonics 1st to...

Simultaneous display of three phase HAR1000-1P can be enhanced with the following accessories: Adds two further phases to the HAR1000-1P. Simple connection without any hardware modifications mean this powerful extension can be added at any time to an existing single phase system. -ffliv » - IJF>* THOU- IM* SI Easy selection of test sequences (left) Immunity measurement of one phase system in real time (right) HARCS Immunity Software This package can be added to the single phase system. It extends the system's emis- sion capability to include power line immunity tests such as harmonic...

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