| 摘要 |
Provided is a three-phase line-interactive uninterruptible power supply having a multi-load transformer. The disclosed three-phase line-interactive uninterruptible power supply comprises: a battery storing backup power; an inverter which converts a direct current (DC) voltage from the battery to an alternating current (AC) voltage and outputs the AC voltage; a transformer which includes a primary winding connected with a three-phase power supply unit and a secondary winding connected with an output portion of the inverter; a first load unit which is connected with a first node, to which the secondary winding of the transformer and the output portion of the inverter are connected, and includes a first load transformer; and a second load unit which is connected with the first node and includes a second switch which corresponds to a circuit breaker, and a second load transformer connected with the second switch. The inverter, the first load unit, and the second load unit are connected in parallel based on the transformer. According to the present invention, an inrush current can be reduced. |
