Frame A drive for 0.5 HP loads on a 480 V bus
The Delta VFD1A5MH43ANSAA is a Frame A variable frequency drive sized for 0.5 HP (0.4 kW) motors on a 3-phase 380–480 V supply — the smallest chassis in this 480 V family and the right fit when the load is a small pump, fan, or conveyor where panel depth, not torque margin, drives the choice.
1.4 kVA output on Normal Duty, 1.8 A continuous
Rated output capacity is 1.4 kVA with 1.8 A continuous output current — the figure that gates which induction motor the drive can run without tripping on I²t during acceleration. The drive's input draw sits at 2.1 A in Heavy Duty and 2.5 A in Normal Duty, so upstream breaker or fuse selection needs to honour both profiles depending on which duty the application lives in. Operating voltage window is 323–528 Vac (–15 % to +10 % of the 380–480 V nominal), which keeps the drive on-line through the brownout and swell conditions common on industrial feeders fed by long cable runs or lightly regulated transformers.
Carrier frequency and the noise/heat trade
Carrier frequency is adjustable from 2–15 kHz with a 4 kHz factory default — pushing it up quiets motor whine but increases IGBT switching losses and derates continuous output; the default is the conservative starting point for commissioning, not the quietest setting. Natural cooling (no internal fan) and an IP20 open-chassis rating mean the drive lives inside an enclosure, not on the machine surface, and convection is the only path for IGBT heat out of the heatsink.