Harmonics and interharmonics are caused by modern electronic power conditioning modules. Such, mostly non-linear, modules to control loads and to reduce power consumption is the source of voltage at unwanted frequencies superposed on the supply voltage.

Voltage fluctuations caused by varying load currents may influence the luminance or the spectral distribution of lighting systems. The impression of the unsteadiness of visual sensation induced by this light stimulus is called flicker.

• Real-time data acquisition

• Internal hard disk for data storage

• 16-Bit A/D converter

• Wide-range current input

• Wide-range voltage input

• Built-in lumped flicker impedance

• High-sophisticated analyzing capability

• USB interface for control and data transfer

Benefits

The fully compliant harmonics and flicker analyzer

The DPA 500N is a fully compliant analyzer for harmonics and flicker as per the latest IEC/EN 61000-3-2, IEC/EN 61000-3-3 and JIS C 61000-3-2 requirements. It follows the design specifications as per IEC/EN 61000-4-7:2002 and Am.1:2008 (for Class A instruments) and IEC/EN 61000-4-15:2010.

Based on a real-time kernel and equipped with its own harddisk it allows to record the measuring data continuously without any gaps or overlapping. The rectangular measurement window is synchronized to each group of 10 or 12 cycles of the mains supply frequency (50Hz or 60Hz) by means of a digital PLL (Phase Lock Loop). A wide-range current input (up to 50A) avoids loss of measured data due to range switching that would occur when using different shunt resistors.

The classification of the measurement can be selected at any time, before or after the measurement has been performed. During all measurements the AC supply voltage is measured simultaneously with the current.

The built-in flicker impedance, which is automatically selected when doing flicker measurement, makes the DPA 500N a complete single-box unit for both harmonics and flicker analysis.

By means of an external current clamp (optional) the current range can be extended up to 140Arms and more.

Software

dpa.control - The control and analysing software for Harmonics and Flicker

dpa.control is the software tool needed for the operation of the harmonics and flicker analysing system. It offers all features to control the DPA 500N, to upload the recorded measuring data and for the classification and analysis. It includes analysis as per the latest standards as well as procedures following the former standard requirements. An easy Fail/Pass function allows fast analysis while detailed data is available for extended analysis and EUT evaluation purposes.

dpa.control offers a powerful documentation capability with direct export to Word.

Other Models

DPA 500 Harmonics and Flicker Analyzer Series

EM TEST offers two models of analyzers for harmonics and flicker for single phase applications (DPA 500N) and three-phase applications (DPA 503). The three-phase analyzer DPA503 can be used for single phase analysis as well.

Auxiliary Devices

ACS 500N6 - Single phase AC voltage source 6kVA

The ACS 500N6 single phase AC voltage source is used to provide a pure AC supply voltage for harmonics and flicker analysis as recommended by IEC/EN 61000-3-2, IEC/EN 61000-3-3 and JIS C 61000-3-2. It offers a rated power of 6kVA and the output voltage ranges up to 300V.

The ACS 500N6 AC voltage source is controlled by dpa.control.

ACS 500N3 - Single phase AC voltage source 3kVA

The ACS 500N3 single phase AC voltage source is used to provide a pure AC supply voltage for harmonics and flicker analysis as recommended by IEC/EN 61000-3-2, IEC/EN 61000-3-3 and JIS C 61000-3-2. It offers a rated power of 3kVA and the output voltage ranges up to 300V. This AC voltage source is used for low-power applications.

The ACS 500N3 AC voltage source is controlled by dpa.control.