UNINTERRUPTIBLE POWER SUPPLY, ARC QUENCHING DEVICE, ELECTRICAL APPLIANCE AND METHOD FOR REDUCING AN ARC ENERGY

An online, double-conversion uninterruptible power supply includes: a UPS input; a rectifier, whose input is connected to the UPS input; an inverter, whose input is connected to an output of the rectifier; a UPS output connected to an output of the inverter; a bypass switch connected between the UPS input and the UPS output; a control unit for closing the bypass switch in case of excessive output current and/or excessive voltage drop and/or excessive power demand at the UPS output; and an override input, which, when activated, inhibits closing the bypass switch.