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The Series Type Hybrid Circuit Breaker (S-HCB) is a circuit breaker designed to turn off a DC based grid with a turn off speed that is comparable to a solid-state circuit breaker, having on state losses comparable to a mechanical circuit breaker, and taking advantage of a zero-crossing current signal during fault mitigation using a reverse bias voltage generating transformer. This type of circuit breaker is especially unique by having a reverse bias voltage generating transformer placed in series with a mechanical switch when most hybrid circuit breakers (HCB) will have current controlling components placed in parallel to a mechanical switch. This circuit breaker design is intended to push the use of DC grids as opposed to AC ones as DC based grids are more efficient but lack as effective circuit protection as the common AC based grids. Implementing this circuit breaker to the growing DC grid demand requires flexibility in its design as the DC grid standard is still in its infancy. To prove that the S-HCB can push DC grids as an alternative to AC grids, this thesis will explain how and why the S-HCB is effective in its defense against short circuits within a DC grid through circuit analysis, simulation, and experimentation of the S-HCB at medium voltages (MV) and multiple fault current ratings all while being tested under superconducting conditions. The results show that the S-HCB can be implemented in multiple power levels of DC grids. To further show off the flexibility of the circuit breaker design, a scalability study is also presented to promote the possibility of the S-HCB being able to work beyond the ratings shown through built prototypes covered in this paper. The data and design strategies are then used to frame future S-HCB designs at different grid voltages and nominal current ratings so that the S-HCB can be implemented to grids beyond the scope of the experiments presented in this paper. S-HCB is a flexible circuit topology that can be used in a variety of DC based systems while having incredibly low on state losses and having one of the fastest response times in the circuit breaker field given its MV scaling.