Which of the following is not a category of static uninterruptable power supply?

In the context of uninterruptible power supplies (UPS), the categories defined are crucial for understanding how they function as power protection devices.

Line-interactive, standby, and online configurations define different methods of maintaining power continuity.

Line-interactive UPS systems can adjust voltage through regulating equipment and can supply power directly or through an inverter, making them effective for moderate disruptions.

Standby UPS systems, often referred to as offline, switch to battery power only when a power failure is detected, providing basic protection during outages.

Online UPS systems provide continuous power by utilizing an inverter that converts incoming AC to DC power and then back to AC, ensuring a clean and uninterrupted power supply.

On the other hand, rotary UPS systems are characterized by a distinct design that includes rotating components, which differentiates them from the static classifications of UPS such as line-interactive, standby, and online systems. Therefore, rotary UPS systems do not fall under the traditional static categories and serve a different purpose in the domain of uninterruptible power supplies, focusing on larger scale or industrial applications rather than the small, electronic systems typically covered in the static categories mentioned.