Sinusoidal Voltage for Harmonics and Flicker Measurements

As per standard requirements a pure AC voltage is needed for measurements of harmonics and flicker. The output voltage of the ACS 503N-series are 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 the ACS 503N-series fulfills the high standard for purity and stability of both the sinuoidal voltage signal and the frequency. With its power ranging from 15,000VA up to 90,000VA (depending on the model) they allow to measure DUTs with a nominal current from 16A up to 75A as per IEC/EN 61000-3-2, IEC/EN 61000-3-3 and JIS C 61000-3-2. 

The ACS 503N-series AC voltage sources are electronically protected against overtemperature, overcurrent, overvoltage and undervoltage. Used with EM TEST DPA 503N harmonics and flicker analyzers the ACS 503N-series is fully remote controlled by the dpa.control software via RS232 interface.

Model overview

Available ACS 503N-models

ACS 503N16 - 3-Phase AC voltage source, 16kVA
ACS 503N30 - 3-Phase AC voltage source, 30kVA
ACS 503N60 - 3-Phase AC voltage source, 60kVA
ACS 503N90 - 3-Phase AC voltage source, 90kVA

Auxiliary Devices

DPA 503N - Digital Power Analyzer for harmonics & flicker testing

AIF 503N-series - Flicker impedances acc. to IEC/EN 61000-3-3


The AIF 503N-series are three-phase flicker impedances 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.