UPS Topologies

Whether protecting a network closet or a data center, UPS ensures that equipment and critical applications will continue to operate during power outages. But not all UPSs are created equal and it’s important to understand the differences between the different topologies so you can choose the right one for your business.

Offline/standby UPS
An offline or standby UPS system does not transfer the load to batteries until it detects that incoming power has dropped below an acceptable level and shuts down connected devices. This is the cheapest type of UPS and is recommended for personal computers, home use or small-to-midsized offices.

Line-interactive UPS
A line-interactive UPS is designed to work with both alternating current (AC) and direct current (DC) power sources. It monitors incoming AC voltage and, when necessary, adjusts the output to maintain the correct voltage. This is the most common UPS type and is recommended for servers, telecommunications equipment and other IT equipment that requires a short shutdown time.

Rotary UPS
A rotary UPS system uses a flywheel that spins continuously under normal operation to provide backup power during an outage. This style of UPS provides 10 to 20 seconds of protection before the engine stops spinning and the power output stops.

Modular UPS
A modular battery-based UPS is comprised of individual UPS and battery modules that can be combined to match your system’s capacity, redundancy or form factor. It’s an ideal solution for organizations with a changing or evolving power need that don’t want to commit to a large investment upfront and for those who need the flexibility of adding units to their UPS system as their power demands change. UPS

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