Fan-cooled three-phase input hot-swappable AC/DC power supply

Murata Power Solutions has introduced the D2U5T-H3-7000 3-phase input hot-swappable AC/DC power supply. The highly-efficient, typically up to 95.5% overall efficiency at 50% full load, provides a 54 VDC main output at up to 7,000W from a 480 VAC input. A user selectable standby output offers either 3.3 or 5VDC. Up to 3,500W can be delivered from a 230VAC input. Active power factor correction gives this unit a 0.99 power factor and less than 10% harmonic current. The fan-cooled D2U5T offers true 3-wire 3-phase operation without the need for a neutral connection and accommodates input voltages in the range 180- 264 VAC for 3,500W operation and 320 – 525VAC for 7,000W output. Packaged in an industry standard 2U format and delivering a 23.1W per cubic inch power density the D2U5T is designed for use in broadcast, industrial and large data centre applications where high power conversion efficiency is vital. Up to three of the hot-swappable units can be connected in parallel operation and utilize droop current sharing to deliver increased power capacity to the system load or provide N+1 redundancy of supply to the application. The D2U5T provides a number of features including over-voltage, over-current and over-temperature protection. LEDs give an indication of power supply status and any fault conditions occurring in the input, output or power conversion stages of the unit. Control and monitoring of the unit is also possible using the standard PMBus protocol via an I2C interface.