Developments made during the EU FP7-funded project iTesla towards automatic ways of transforming power systems from proprietary format to Modelica, served as a proof of concept for the adoption of Modelica as a common and standardized language for power system modelling and simulation. This work is a continuation of the progress made during the iTesla project. This paper presents a tool developed with the main purpose of providing users with an easy way to generate power system networks in Modelica and perform time-domain simulations. The tool is validated by generating Modelica systems for IEEE cases and comparing simulation outputs with a reference commercial tool (Eurostag).