Fora three-phaseR-L load fedbya 12-pulse cycloconverter, thisworkpresentsananalysisof theinterharmonicinput currentsbehaviourunderdifferentunbalancedload conditions. •Thepowersystemismodeledand embeddedin a real-time simulatorbasedona Dspaceplatform(RTDS). Theresultsare analizedwithexternalelectronicequipmentand allowtheexperimental verificationof new methodologyfordetectingabnormalload conditions.