Be prepared: How to select your UPS power protection appropriate to your ICT installation’s criticality

Power outages seem very unusual in West European countries. We are always on, the infrastructure is running, we do not expect any power cuts.

But still, the risk remains. And if a company experiences a blackout, not only the ICT hardware may be damaged; the loss of data and service continuity, and consequential the harm to reputation, will likely be far more serious.

The colleagues at Kohler UPS are also convinced by this. They have compiled an insightful article on “The reality of power cuts” and look at the options available to secure a level of UPS power protection appropriate to your ICT installation’s criticality:

“The off-line UPS system’s advantages are its lower capital and operating costs, but it subjects its load to poor regulation and any power aberrations arriving from the mains supply during normal operation. The load also suffers a typical 2 – 10 ms power interruption during transfers between the inverter and bypass line. If your load can tolerate these interruptions, and the transient filtering provided by the off-line UPS system is considered sufficient, it may be a viable choice. However, most users with critical loads select on-line UPS solutions, to benefit from the continuous and truly uninterrupted power protection they provide.

Finally, the availability of the UPS itself must also be factored in; fortunately, with most modern UPS architectures, this can be very high. The best approach is to use a modular UPS system with “hot-swap” capabilities. Modules can be incrementally added to build scalable UPS systems with efficient redundancy, while hot swappability means that MTTR times are minimised. Both these factors contribute to today’s high UPS availability figures.”

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