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%Start What Are the Types of Uninterruptible Power Supplies? GA
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lifewire's editorial guidelines Updated on February 20, 2022 Reviewed by Ryan Perian Reviewed by
Ryan Perian Western Governors University Ryan Perian is a certified IT specialist who holds numerous IT certifications and has 12+ years' experience working in the IT industry support and management positions. lifewire's editorial guidelines Tweet Share Email Tweet Share Email Accessories & Hardware The Quick Guide to Webcams Keyboards & Mice Monitors Cards HDD & SSD Printers & Scanners Raspberry Pi Uninterruptible Power Supplies/Sources (UPS) are backup electrical energy sources designed to kick in when main power fails.
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Scenarios can include voltage interruptions, spikes, surges—pretty much any instance where the UPS detects a significant enough reduction. Sizes and output can vary from small units meant to power a single computer to large units used to power buildings.
What Are Uninterruptible Power Supplies Used For
Most UPS should turn on almost instantly when a power disruption is detected, providing uninterrupted electrical power to the connected systems.
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The amount of time a UPS can operate depends on the model, lasting anywhere from a few minutes to several hours, to always-on. Then users have time to safely shut down their hardware or connect to another power source. In the case of an always-on UPS, they continually protect critical equipment.
UPS most commonly protect data communication systems or data centers and are available for small office or personal use.
UPS most commonly protect data communication systems or data centers and are available for small office or personal use.
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You can also use them to keep other critical electronic devices powered during outages and surges, like cordless phones and security systems.
Offline Standby
Offline Standby UPS are the simplest type of UPS and function as battery backups. These models are designed to detect changes in voltage above and below specific points, switch to internal batteries, then convert that energy to AC power.
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The process can take up to 25 milliseconds, depending on the unit. AC power is then used to keep connected devices running.
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Offline Standby UPS provide the smallest window of power backup, typically offering five to up to 20 minutes. Examples of Standby UPS use include consumer electronics, security systems, and point-of-sale systems for retail stores.
APC
APC
Line Interactive
Line Interactive UPS detect voltage fluctuations and act as a backup power source during blackouts and surges, just like Standby models.
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What sets a Line Interactive UPS apart is that they use an internal autotransformer to detect and adjust for small changes in voltage without switching to internal batteries. This function allows Line Interactive UPS to protect connected devices from small voltage changes and brownouts without affecting its ability to act as a separate power source.
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Line Interactive UPS typically provide a slightly larger power backup window—up to half an hour—but can last for several hours with capacity expansion. Examples of Line Interactive UPS include the same kinds of devices used with Standby UPS and networking equipment, mid-range servers, and home theaters.
Tripp Lite
Tripp Lite
Online Double-Conversion
Online Double-Conversion UPS are the most advanced types of UPS and provide a constant stream of power.
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They convert AC power to battery power and then back to AC, eliminating power transfer time since the units never need to switch power modes. The constant stream of energy keeps internal batteries charged, which will activate when there's power loss. The internal batteries will automatically recharge once external power restores and the UPS starts cycling from AC to the battery to AC power again.
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Online Double-Conversion UPS are used for critical electronic equipment. Usage examples include data centers, IT equipment, telecom systems, and high-end server banks.
Battery Backup Power, Inc FAQ Which uninterruptible power supplies can send an email message?
Battery Backup Power, Inc FAQ Which uninterruptible power supplies can send an email message?
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The best uninterruptible power supplies will be able to alert you via email message or text message of power supply disruptions, real-time power consumption, voltage-current draw, and more. You can also receive email notifications when power is lost or restored.
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How long can uninterruptible power supplies last? How long your UPS can last depends on various factors, including capacitors, fans, and batteries.
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UPS units can last as long as 15 years, but sometimes primary components will need to be replaced. Regularly service and maintain your UPS, so its battery doesn't fail before its time.
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Proactively replace fans before they fail, and replace capacitors immediately if there are any signs of failure. Was this page helpful? Thanks for letting us know!
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Subscribe Tell us why! Other Not enough details Hard to understand Submit More from Lifewire What Is a Battery Backup? (Uninterruptible Power Supply) Picking a UPS (Battery Backup) for Your Mac or PC What is a PSU?
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