UNINTERRUPTIBLE POWER SUPPLY APPARATUS

An uninterruptible power supply apparatus includes a feed compensation circuit and a bypass circuit. The bypass circuit is provided in electrically parallel with the feed compensation circuit. The bypass circuit includes first to third switches and first to third circuits. The first to third switches are connected respectively to the first to third phases of a three-phase AC load. The first to third circuits are provided in electrically parallel with the first to third switches, respectively. The first circuit includes a first snubber circuit, a second snubber circuit, and a power line. The second circuit includes a first snubber circuit, a second snubber circuit, and a power line. The third circuit includes a first snubber circuit, a second snubber circuit, and a power line. Respective power lines of the first to third circuits are electrically connected to each other.