The Helios TSSW 5 is a compact, built-in transformer designed for direct installation into fuse boards. Supplied without an external housing, it includes a base ring and terminal strip for straightforward integration. This unit provides five voltage outputs — 0, 80, 130, 170, and 230 volts — allowing for precise control of fan speeds. Ideal for applications requiring efficient and space-saving fan speed regulation, the TSSW 5 ensures reliable performance within electrical control panels.