UPS protects sensitive equipment

An incoming three-phase emergency supply and an outgoing single-phase supply allow the Liebert NXf to deliver continuous power distribution, free of interference.

Emerson Network Power's Liebert NXf UPS provides optimum handling of power loads and ensures full business critical continuity for IT infrastructures found in small datacentres, telephone company facilities, banks and shopping precincts.

Emergency lighting systems can also be protected, offering very high safety standards.

Available in 10, 15 and 20 kVA power ratings, the new solution, like the whole NX Liebert family, features online double conversion technology to control the whole supply system through digital signal processors (DSPs) that process all signals from both loads and network in real-time.

An incoming three-phase emergency supply and an outgoing single-phase supply allow the Liebert NXf to deliver continuous power distribution, free of interference.

Supplying the UPS from power generating sets and MV/LV transformers is made easier and more efficient, while at the same time reducing power loss in the plant, correcting the power factor and eliminating current harmonics generated by the loads supplied by the UPS.

The Liebert NXf also includes an inverter with full-digital control technology, the ability to supply loads with capacitive power factor without downrating and noise levels below 55dB.

In addition, the input power factor of 0.99 reduces running costs and up to six units can be run in parallel.

Finally, to eliminate possible variations in power supply, Liebert NXf is equipped with an IGBT rectifier that ensures harmonic rejection of below 3%, avoiding UPS interference with other sensitive instrumentation connected upstream of the plant.

During the power supply phase, the IGBT Inverter can also efficiently handle nonlinear 100% unbalanced loads.

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