Since the interlamination short-circuits in stator cores can cause major damage to electrical machine a great emphasis is placed to detect such faults. One of the methods is ELCID (Electromagnetic Core Imperfection Detector) test [1], which is nowadays often used for testing of interlamination insulation in stator cores of large electrical generators and motors. To investigate this relatively young method a laboratory model of stator core was built, which enables measurements and analyses of intentional short-circuits in the core. Interlamination faults were also simulated and analysed using FEM. Both investigation results were compared and presented.