This paper presents the RT-LAB Electrical Drive Simulator technology along with practical applications. The RT-LAB[Opal-RT Technologies inc.] simulation software enables the parallel simulation of electrical circuit on clusters of PC running QNX or RT-Linux operating systems at sample time below 10 ?s. Using standard Simulink models including SimPowerSystems models, RT-LAB build computation and communication tasks necessary to effectively make parallel simulation of electrical systems on low cost off-the-shelf PC technology. To accommodate the high bandwidth of electrical systems, the RT-LAB Electrical Drive Simulator comes with special Simulink-based modelisation tools, namely ARTEMIS[Opal-RT Technologies Inc.] and RT-Events[Opal-RT Technologies Inc.], that permits real-time simulation of electrical systems at practical time step of 10 ?s but with sub-?s equivalent precision through the use of interpolation techniques.