1.5 kW / 230 V single-phase, naturally cooled
The Delta VFD015E21A is a VFD-E series variable frequency drive sized for 1.5 kW (2 HP) motor output from a 230 V single-phase mains input — the wall-mount format that drops into small-panel fan, pump, conveyor and mixer retrofits where only single-phase utility is available. Natural-cooling construction with no integrated fan means mounting orientation and surrounding clearances matter more than on a force-ventilated unit of equivalent power.
Sizing, motor match and the 230 V single-phase envelope
Listed motor capacity is 1.5 kW at the 015 frame size, with the '21' designator fixing input as 230 V single phase — so it pairs with 230 V three-phase induction motors common on small machine tools, fans and pumps fed from a single-phase service. The standard 'A' version variant, not an economy or high-spec trim, keeps the parameter set aligned with the broader VFD-E family for commissioning software compatibility.
Within the VFD-E family: where this code sits
Within Delta's VFD-E line, the VFD015E21A shares the 1.5 kW / 2 HP frame with the VFD015E43A (460 V three-phase input) and the VFD015E23A (230 V three-phase input) — same horsepower, different mains supply, so substitution across them is a wiring-level decision driven by what the panel already feeds. The smaller VFD007E21A sits one frame down at 0.75 kW / 1 HP on the same 230 V single-phase input.