DIRECT CURRENT UNINTERRUPTIBLE POWER SUPPLY SYSTEM

摘要

Disclosed is an uninterruptable DC power supply system. The uninterruptable DC power supply system according to an embodiment of the present invention comprises: a first connection unit electrically connected to a DC power converting device converting regular AC power into DC power; a charging unit having a second connection unit providing the DC power or power output from the auxiliary power supply to the load and charging the auxiliary power supply; a discharging unit generating internal voltage power; a comparison unit outputting clear voltage or set voltage; and a switching unit having the first connection unit and a relay connected to the second connection unit and discharging unit and allowing the DC power supplied from the DC power converting device to be supplied to the second connection unit.