A new full annulus turbine cascade at TU Dresden was designed and built for the experimental analysis of secondary flows in modern high-pressure turbine vanes at engine-relevant Mach numbers. To simulate appropriate inflow conditions to the vanes representative of a second stage of a high-pressure turbine the rig is equipped with inlet guide vanes and exchangeable inlet grids. These allow to set the turbulence level as well as conditioning of the boundary layer. This paper introduces the design and instrumentation of the rig and presents results of the commissioning phase. In the following experiments, the annular cascade is divided into four sectors to investigate different geometrical features like fillet radii and their influence on the secondary flows in one build. Utilizing this approach to save cost, flow uniformity around the annulus needs to be considered. The flow uniformity analysis based on commissioning results and Computational Fluid Dynamics simulations is presented.