During a site-risk assessment for a tier-3 data center, the security team must confirm that the facility can ride through extended utility outages without disrupting business services. Within this context, what is the primary function of the onsite diesel generator that complements the UPS system?
To provide backup power when utility electricity is unavailable
To serve as the primary power source during normal peak workloads
To regulate and distribute power among branch circuits
A generator's chief purpose in a data-center power chain is to take over as the long-duration power source when utility power fails. While a UPS supplies instantaneous, short-term battery power, the generator starts within seconds and then feeds electricity to all critical and support systems for as long as fuel is available, preserving uptime and security. Cooling, load regulation and peak-shaving are handled by other infrastructure components.
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Why is a backup power source like a generator critical for data center security?
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How does a data center's uninterruptible power supply (UPS) work with a generator?
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What are some other components of a data center's power management strategy beyond generators?