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Qu'est-ce (qui) est uninterruptible power supply - définition
Uninterruptible power supply
ELECTRICAL DEVICE THAT USES BATTERIES TO PREVENT A POWER FLOW INTERRUPTION
Uninterruptible Power Supply; UPS (uninterruptible power source); Uninterruptible power supply unit; UPS unit; Standby power system; Uninterrupted Power Supply; Internal ups; Some UPS manufacturers; Uninterruptible power supplies; Uninterruptable power supply; Uninterruptible power source; Battery backup; Battery-backup; Uninterrupted power supply; Back-ups; Back-up power; Continuous power supply; Electricity disruption; Alarm power supply; U.P.S. Systems; Voltage and frequency independent; Uninterruptable power supplies; Backup power supply; No-break
An uninterruptible power supply or uninterruptible power source (UPS) is an electrical apparatus that provides emergency power to a load when the input power source or mains power fails. A UPS differs from an auxiliary or emergency power system or standby generator in that it will provide near-instantaneous protection from input power interruptions, by supplying energy stored in batteries, supercapacitors, or flywheels.
Uninterruptible Power Supply
ELECTRICAL DEVICE THAT USES BATTERIES TO PREVENT A POWER FLOW INTERRUPTION
Uninterruptible Power Supply; UPS (uninterruptible power source); Uninterruptible power supply unit; UPS unit; Standby power system; Uninterrupted Power Supply; Internal ups; Some UPS manufacturers; Uninterruptible power supplies; Uninterruptable power supply; Uninterruptible power source; Battery backup; Battery-backup; Uninterrupted power supply; Back-ups; Back-up power; Continuous power supply; Electricity disruption; Alarm power supply; U.P.S. Systems; Voltage and frequency independent; Uninterruptable power supplies; Backup power supply; No-break
<hardware> (UPS) A battery powered power supply unit that is
guaranteed to provide power to a computer in the event of
interruptions in the incoming mains electrical power.
Different rating UPSs will provide power for different lengths
of time.
Modern UPSs connect to the computer's serial port and
provide information such as battery time remaining, allowing
the computer to shut down gracefully before complete loss of
power.
(1996-12-11)
Power supply unit (computer)
![Voltage converter for 80486DX4 processors (5 V to 3.3 V). Note the heat sink on the [[linear regulator]], required to dissipate the wasted power.](https://commons.wikimedia.org/wiki/Special:FilePath/Voltage converter for 80486 dx4 processors 2007 03 27.jpg?width=200 "Voltage converter for 80486DX4 processors (5 V to 3.3 V). Note the heat sink on the [[linear regulator]], required to dissipate the wasted power.")
![PCB]] of a power supply from an IBM XT clone](https://commons.wikimedia.org/wiki/Special:FilePath/XT-PC-Power-Supply-PSU-PCB-IMG 0435.JPG?width=200 "PCB]] of a power supply from an IBM XT clone")
![PS3 power supply, shorter than ATX, only, 300 W maximum (not to be confused with the [[PlayStation 3]])Evercase UK: [http://www.evercase.co.uk/PowerSupplyMeasurements.htm Power Supply Measurements], retrieved 1 June 2016](https://commons.wikimedia.org/wiki/Special:FilePath/PS3 PC-PSU IMG 2431.JPG?width=200 "PS3 power supply, shorter than ATX, only, 300 W maximum (not to be confused with the [[PlayStation 3]])Evercase UK: [http://www.evercase.co.uk/PowerSupplyMeasurements.htm Power Supply Measurements], retrieved 1 June 2016")
![ATX PSU tester with an [[LCD]]](https://commons.wikimedia.org/wiki/Special:FilePath/Power_supply_tester_with_LCD_display_readout.jpg?width=200 "ATX PSU tester with an [[LCD]]")
![ATX PSU tester with [[LED]] indicators](https://commons.wikimedia.org/wiki/Special:FilePath/Power_supply_tester_with_LED_indicators.jpg?width=200 "ATX PSU tester with [[LED]] indicators")
INTERNAL COMPUTER COMPONENT THAT PROVIDES POWER TO OTHER COMPONENTS
Modular power supply; Power supply rail; EPS12V; ATX power supply; Power-supply tester; Computer PSU; PC Power Supplies; Power Supply Tester; Modular power supply unit; Computer psu; Computer power; PC power supply; Computer power supply; Entry-Level Power Supply Specification; Power Supply Unit (Computer); Single-voltages; Single-voltaged; ATX PSU; Power supply tester; Modular Power Supply Unit; PSU MTBF; PSU life span; PSU reliability; 5VSB (5V Standby) Signal; SFX (PSU); Efficiency of computer supplies
A power supply unit (PSU) converts mains AC to low-voltage regulated DC power for the internal components of a computer. Modern personal computers universally use switched-mode power supplies.
