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CPS vs UPS for powering data centers - an Eltek White Paper

How the advantages of a "no break" Converged Power System (CPS) provided better power reliability, system availability and reduced costs over a Uninterruptable Power System (UPS).

Abstract

The static UPS is the common foundation of a data center power system because it is well known and been around for many years. It is a single input system that conditions the power with batteries, which support the load during the transition of input power during power failure. This transition to a second source is facilitated by an automatic transfer switch (ATS) external to the UPS. The second power source is normally a diesel generator that will be used during a complete black out or irregular power feed such as a brown out or low input power.

To replace this workhorse power system requires a dramatically better solution. While lower cost is important, power systems are mostly judged on reliability and availability. Making a significant improvement in all three areas is the way to change data center operator's minds about a new system. 

The CPS is a power system that entered the data center market in 2013, with a background in the telco DC power market as well as in industrial applications. It is also an uninterruptable power source with batteries and functions in the same way as a UPS, smoothing the power during irregular power feed such as a brown out or low input power. However the CPS does not leverage an ATS for switching between two inputs, because the ATS is a single point of failure and breaks the input power supply for a short period of time during the transition. The CPS, instead, has direct connections to both power inputs offering a "no break" transition between inputs. 

Download the White Paper "CPS vs UPS for powering data centers" (PDF - 0,8MB)

Power Solutions from Eltek caters for all power needs in the data center. It combines the advantages of modern, modular power technology while meeting all AC and DC load requirements. Our power expert Mat Heneghan explains:



The journey towards a modular and DC powered future has started!

Learn more about Converged Power Solutions for data centers.

CPS vs UPS for powering data centers - an Eltek White Paper

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