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Diesel Rotary UPS (DRUPS)

Operational Availability

Operational availability is an important metric that enables evaluation of different technologies for use in mission-critical applications. When comparing one technology to another, it’s important to take into account all the areas that are affected by the change in technology. The larger capacity of a DRUPS makes a direct comparison to a static UPS system complicated. 


Article image courtesy of 123net under a Creative Commons license 


A 2,000kVA/1,600kW DRUPS lacks any static equivalent, oftentimes requiring two or three static units to perform the same job. The number of maintenance events and downtime is thereby negatively affected owing to the increased amount of equipment. Similarly, the DRUPS in this example resides outside in sound-attenuated enclosures. 

It has no need for air conditioning, spill containment, battery maintenance or, for that matter, a physical building to house and protect the equipment. All of these factors should be taken into account when measuring the operational availability of mission-critical infrastructure.

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