The new version 300 to 400kVA models has been added to the Master Plus HIP series. Thanks to the double conversion on-line technology achieved entirely with IGBT and DSP (Digital Signal Processor) control, the Master Plus HIP series guarantees maximum protection as well as high quality power for any type of IT and industrial load.

It is especially suited for mission critical applications and is classed VFI SS 111 (Voltage and Frequency Independent) in compliance with IEC EN 62040-3 standards. 
This series has been designed using a new configuration that includes an IGBT rectifier with sinusoidal input current in place of the traditional thyristor rectifier.

MAIN CHARACTERISTICS
. Low input current distortion - less than 2.5%
. High input power factor 0.99
. Power walk-in function that ensures progressive rectifier start up
. Delayed start up phased with the return of mains power supply, when several UPS are connected in the system.
. Efficiency up to 98,5 %
. Output power factor 0.9
. Compact footprint: only 1,5 m² for the 400kVA UPS model
. Reduced weight
. Double electronic and galvanic protection of the load from the battery

The whole Master Plus HIP range is suitable for use in the widest selection of applications; thanks to the flexible configurations, accessories and optionals available, it is suitable for powering capacitive loads, such as blade servers etc. Reliability and availability of the power supply for critical applications are guaranteed by the distributed or centralised parallel of up to 8 units, for a backup (N+1) or power parallel and by all the various configurations available in the Master Plus range.

More details
http://www.riello-ups.com/?en/product/61/master-plus-hip