With the increasing adoption of dc power distribution in both residential and commercial electrical installations, the demand for a universal power electronics interface between single-phase or three-phase ac systems and dc is becoming more critical. While 230 Vrms and 400 Vrms are standard on the ac side, 350 Vdc has emerged as the most established standard for buildings, following the NPR9090 and Current/OS protocols. In addition, besides adhering to standards, it is essential to provide reliable solutions capable of operating under faulty conditions. To address these needs, this paper proposes a universal interlinking converter (ac-dc). The proposed solution operates with both single-phase and threephase systems using a single hardware platform and remains functional under fault conditions, such as the loss of a phase or neutral wire. Furthermore, experimental results are presented to validate this proposal.