Contained within a 9U deployable rack, these two commercial power supplies (1 rail at 1200W/50A/60V/1600VA and 4 rails shared at 420W/24A/70V/650VA) can be taken practically anywhere. In order to protect from voltage surges, these 'universal input' supplies are operated at 120V instead of 240V (via a rack mounted 2400VA 2:1 transformer), which massively increases input voltage headroom. This, combined with the inrush limiting resistor (with relay bypass) and over voltage suppression/disconnection, ensure that the deployable supplies are effectively bullet-proof and also free of start-up transients. Doing it this way also has the added benefit of a 120V output via NEMA 5-20R receptacles. Input to the box is 240V +10%/-15% at 50Hz.