Drive module for harmonic-sensitive HVAC lines
Frame R11 carries the power stage; the module mounts as a standalone unit in the panel. UL listing gives two duty bands: light-overload at 477 A (400 Hp) and heavy-duty at 414 A (350 Hp). The heavy-duty figure governs continuous motor load; light-overload covers fan and pump curves with intermittent peak demand. Frequency range is 47.5 to 63 Hz, covering 50/60 Hz mains with tolerance for weak grids or generator supply.