When an uninterruptible power supply isn't Why it's necessary to scrutinize systems for vulnerabilities and plan for emergencies John Rezabek Oct. 7, 2025 4 min read Key takeaways: A UPS system, even a redundant configuration, can disrupt control and emergency shutdown systems. No power supply is. . What is an uninterruptible power supply system (UPS) and why do I need one? An uninterruptible power supply (UPS) is an electrical device that provides emergency power to connected equipment when the main power source (typically utility power) fails.
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