Today's power supplies power regulation systems cause harmonics and interharmonics being fed back into the public supply system. EM TEST offers dedicated solutions for measuring and analysing harmonics and flicker for your needs:

Application

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.

The DPA500N harmonics and flicker analyzer is used for single phase applications.

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 61000-4-15:2003.

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.

Standards

Application

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.

The DPA 503N is used for 3-phase applications but also supports single phase applications.

Benefits

The fully compliant harmonics and flicker analyzer

The DPA 503N 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 as well as IEC/EN 61000-3-11 and IEC/EN 61000-3-12 requirements. The DPA 503N has six independent input channels; three for voltage and three for current. It follows the design specifications as per IEC/EN 61000-4-7:2002 and Am.1:2008 (for Class A instruments) for harmonics analyzers and IEC/EN 61000-4-15:2003 for flicker meters.

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 synchronised 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 140A) 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

Standards

Application

ACS 500N6 is a single phase AC source, specifically designed for harmonics and flicker testing. It meets the corresponding specifications as per EN/IEC 61000-3-2 and EN/IEC 61000-3-3 as well as JIS C 61000-3-2.

ACS 500N6 provides the perfect sinusoidal and stable voltage signal specified to perform fully compliant harmonics and flicker measurements/analysis despite of the mains supply frequency and steadyness of the voltage.

Benefits

Sinusoidal Voltage for Harmonics and Flicker Measurements

As per standard requirements a pure voltage is needed for measurements of harmonics and flicker. The output voltage of the ACS 500N6 is guaranteed to be sinusoidal with a very low distortion (THD) of less than 0.1% regardless of the load. Furthermore the voltage is kept stable within 0.1% independent of the load, even if the load is variable.

No matter what the condition of the mains supply might be ACS 500N6 fulfills the high standard for purety and stability of both the sinuoidal voltage signal and the frequency. With a power of 6kVA it is well dimensioned for measurements as per EN/IEC 61000-3-2 and EN/IEC 61000-3-3 as well as JIS C 61000-3-2 up to 16A.

The ACS 500N6 is electronically protected against overtemperature, overcurrent, overvoltage and undervoltage.

Used with an EM TEST DPA 500 Series harmonics and flicker analyzer ACS 500N6 is fully remote controlled by dpa.control software via RS232 interface.

Standards

Application

ACS 500N3 is a single phase AC source, specifically designed for harmonics and flicker testing. It meets the corresponding specifications as per EN/IEC 61000-3-2 and EN/IEC 61000-3-3 as well as JIS C 61000-3-2.

ACS 500N3 provides the perfect sinusoidal and stable voltage signal specified to perform fully compliant harmonics and flicker analysis despite of the mains supply frequency and steadyness of the voltage.

Benefits

Sinusoidal Voltage for Harmonics and Flicker Measurements

As per standard requirements a pure voltage is needed for measurements of harmonics and flicker. The output voltage of the ACS 500N3 is guaranteed to be sinusoidal with a very low distortion (THD) of less than 0.1% regardless of the load. Furthermore the voltage is kept stable within 0.1% independent of the load, even if the load is variable.

No matter what the condition of the mains supply might be ACS 500N3 fulfills the high standard for purety and stability of both the sinuoidal voltage signal and the frequency. With its power of 3,000VA it can be used for measurements as per EN/IEC 61000-3-2 and EN/IEC 61000-3-3 as well as JIS C 61000-3-2 on DUTs with small power consumption, not exceeding 10A of nominal current for resistive load.

The ACS 500N3 AC voltage source is electronically protected against overtemperature, overcurrent, overvoltage and undervoltage.

Used with EM TEST DPA 500 Series harmonics and flicker analyzers ACS 500N3 is fully remote controlled by dpa.control software via RS232 interface.

Standards

Application

ACS 500N2.2 is a single phase AC source, specifically designed for test applications as per IEC 61000-4-16 in combination with the CWS 500N4 common-mode disturbance simulator. It also meets the requirements fo IEC/EN 61000-3-2 and IEC/EN 61000-3-3. The galvanically isolated input guarantees the test signal to be separated from the mains supply voltage.

By means of the ACS 500N2.2 the capabilities of the CWS 500N4 can be expanded for tests at 16.66Hz as well as 50Hz and 60Hz independent from the actual mains supply frequency delivering a max. output voltage of 330V.

Standards

Application

The AIF 503N-series are three-phase flicker impedances with a nominal current from 16A up to 75A per phase offering two different impedance values. Zref is used as the flicker impedance as per IEC/EN 61000-3-3 and specified by IEC 60725. Ztest is used for equipment being intended for connection to a public low-voltage distribution system having a service current supply capability of more than 100A specified in IEC/EN 61000-3-11.

Benefits

Three-phase Flicker Impedance for Measurements up to 75A

The AIF 503N-series unifies the required impedance values for two applications (except for the AIF 503N16 model). It offers a flicker impedance with the values in accordance with IEC 60725 for flicker measurements as per IEC/EN 61000-3-3. It also includes a second impedance used for flicker measurements on DUTs with a rated current above 16A which are intended to be connected to a public low-voltage distribution system with a service current of more than 100A.

The inductors used are non-saturable air coils and are manually matched to the specified value.

The AIF 503N-series is used along with the DPA503N for single phase as well as for three phase measurements. The AIF 503N-series is fully remote controlled by dpa.control software. LED indicators on the front panel show the actual mode of use. The AIF 503N32/-N63/-N75 are delivered in a rack on wheels there is space to house the DPA503N for best user convenience.

Standards