UPS |
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between two and three per cent a reasonable expectation . However , the use of standard eco-mode reduces power protection as the IT load is exposed to raw utility mains power without the conditioning normally provided by the doubleconversion , online UPS . The UPS must continuously monitor the mains power and quickly switch to the UPS inverter when a problem is detected , before the problem can affect the critical load .
Ultra efficient ECOnversion technology
A better and more advanced eco-mode provides energy savings while offering enhanced power protection for connected loads than when operating in standard eco-mode .
A primary example of this is Schneider Electric ’ s ECOnversion mode , in which the inverter runs in parallel with the bypass source , supplying the reactive part of the load and maintaining an input power factor close to unity . When operating in ECOnversion mode the
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‘ By utilising Galaxy VX in ECOnversion mode , energy savings of more than £ 407,000 can be made over a 10-year life of a 1.5MW UPS .’ |
load is never exposed directly to the unconditioned utility power , as is the case with standard Eco Mode .
Keeping the inverter on in ECOnversion mode has a small impact on efficiency ; it can drop below the 99 per cent rating of ECO Mode depending on the connected load . Using this mode , the inverter is not continuously regenerating output power to the load like in double conversion mode ; instead the load is receiving unconditioned bypass power . The main advantage of ECOnversion Mode is that the inverter can seamlessly take over to support the load in case of bypass utility failure . The inverter is also able to correct the power factor of the load and actively filter harmonic currents generated by the load . Operating in parallel with the bypass switch , the inverter is continually powered and ready to take over in the case of mains failure .
In such cases the bypass utility supplying the UPS is
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disconnected from the inverter without changing the inverter output voltage level and the supplied load voltage level . The switch over is instantaneous and barely perceptible at the UPS voltage output .
Typically , the regulated power supplied by a UPS operating in double conversion mode is rated as a Class 1 supply while that coming from a UPS in standard Eco mode is rated as Class 3 . A UPS in ECOnversion mode also provides a Class 1 output , so there is no longer a trade off between efficiency and reliability .
The Galaxy VX family of UPS systems extends the earlier VM range into the data centre with more powerful models intended for high power rating applications . With its built-in reliability and cost saving features it provides advanced protection against power outages while keeping capital and operational costs under control .
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30 | April 2017 |