Which UPS configuration is most commonly used for server rooms and is connected to the battery during a power failure?

Which UPS configuration is most commonly used for server rooms and is connected to the battery during a power failure?

• A. Stand By On-Line Hybrid
• B. Standby
• C. Hot And Cold Aisles
• D. Stand By Ferro

Answer: (A)

The main idea here is providing uninterrupted, clean power to servers. In server rooms you want the load to stay powered without any interruption when the mains fail. A Stand By On-Line Hybrid UPS is designed to do that by combining online (continuous, double-conversion protection) operation with standby benefits. In normal conditions it keeps the battery charged and can run the critical load through an online path, and when a power failure occurs it seamlessly draws from the battery to keep servers running without a noticeable delay. That immediate, reliable power is why this configuration is commonly used in data centers. The other options don’t fit as well. Standby alone tends to rely on bypass and can introduce a brief switch to battery during outages, which is not ideal for high-availability server rooms. Hot and cold aisles describe cooling layouts, not power protection. Ferro-based Stand By is an older, less common technology in modern data centers.

The main idea here is providing uninterrupted, clean power to servers. In server rooms you want the load to stay powered without any interruption when the mains fail. A Stand By On-Line Hybrid UPS is designed to do that by combining online (continuous, double-conversion protection) operation with standby benefits. In normal conditions it keeps the battery charged and can run the critical load through an online path, and when a power failure occurs it seamlessly draws from the battery to keep servers running without a noticeable delay. That immediate, reliable power is why this configuration is commonly used in data centers.

The other options don’t fit as well. Standby alone tends to rely on bypass and can introduce a brief switch to battery during outages, which is not ideal for high-availability server rooms. Hot and cold aisles describe cooling layouts, not power protection. Ferro-based Stand By is an older, less common technology in modern data centers.