Apc ups how does it work

This type of UPS is able to tolerate continuous under voltage brownouts and overvoltage surges without consuming the limited reserve battery power. It instead compensates by auto-selecting different power taps on the autotransformer. Changing the autotransformer tap can cause a very brief output power disruption,[citation needed] so the UPS may chirp for a moment, as it briefly switches to the battery before changing the selected power tap. This has become popular even in the cheapest UPS because it takes advantage of components already included.

Further, it is easier to do the switching on the line-voltage side of the transformer because of the lower currents on that side. Autotransformers can be engineered to cover a wide range of varying input voltages, but this requires more taps and increases complexity, and expense of the UPS. It is common for the autotransformer to only cover a range from about 90 V to V for V power, and then switch to battery if the voltage goes much higher or lower than that range.

In low-voltage conditions, the UPS will use more current than normal so it may need a higher current circuit than a normal device. For example to power a watt device at volts, the UPS will draw 8. If a brownout occurs and the voltage drops to volts, the UPS will draw 10 amps to compensate. This also works in reverse, so that in an overvoltage condition, the UPS will need fewer amps of current. The online UPS is ideal for environments where electrical isolation is necessary or for equipment that is very sensitive to power fluctuations.

Although once previously reserved for very large installations of 10 kW or more, advances in technology have permitted it to now be available as a common consumer device, supplying watts or less. In an online UPS, the batteries are always connected to the inverter, so that no power transfer switches are necessary. When power loss occurs, the rectifier simply drops out of the circuit and the batteries keep the power steady and unchanged.

When power is restored, the rectifier resumes carrying most of the load and begins charging the batteries, though the charging current may be limited to prevent the high-power rectifier from overheating the batteries and boiling off the electrolyte. The main advantage to the on-line UPS is its ability to provide an electrical firewall between the incoming utility power and sensitive electronic equipment.

It allows control of output voltage and frequency regardless of input voltage and frequency. A second major advantage is the inbuilt bypass circuit in on-line UPS which ensures should any problems occur with the UPS or batteries as long as there is mains power the load will be powered. We support a wide range of industries across the UK and internationally. For further information please contact our sales team. Critical Power Specialists - Nationwide Cover 24 hours.

Critical Power Supplies - London Critical Power Supplies - Birmingham Critical Power Supplies - Manchester About Us Case Studies. Uninterruptible Power Supplies Find your product. Uninterruptible Power Supplies Information. Power output consistency and stability is one of the main purposes of the inverter. One Comment. Thanks a lot. I know understood how a UPS system works. Manjula Krishna. July 8, Leave a Reply Cancel reply Your email address will not be published. Comment Name Email Website Save my name, email, and website in this browser for the next time I comment.

Go to mobile version. Building Wiring Fault Indicator - LED indicator that informs users of potentially dangerous wiring problems in wall circuits. Transformer-Block Spaced Outlets - Protect equipment without blocking access to other receptacles. Automatic Self-Test - Periodic battery check that ensures early detection of batteries needing replacement. Enhanced Automatic Voltage Regulation AVR - Gives high application availability by correcting low and high voltage conditions without using the battery.

Pure Sine-Wave Output on Battery - Simulates utility power to provide the highest degree of compatibility for active PFC power factor corrected servers and sensitive electronics. Scalable Runtime - Allows additional runtime as needed via external battery packs. Power Conditioning - Protects connected loads from surges, spikes, lightning, and other power disturbances. Advanced Adjustable Voltage Transfer Points - Maximize useful battery life by widening the input voltage window or tightening the output voltage regulation.

Temperature-Compensated Battery Charging - Prolongs battery life by regulating the charge voltage according to battery temperature. Intelligent Battery Management - Maximizes battery performance, life, and reliability through intelligent, precision charging. Predictive Failure Notifications - Provide early-warning fault analysis, ensuring proactive component replacement. In a continuous UPS , the computer is always running off of battery power and the battery is continuously being recharged.

You could fairly easily build a continuous UPS yourself with a largish battery charger, a battery and a power inverter. The battery charger continuously produces DC power, which the inverter continuously turns back into volt AC power. If the power fails, the battery provides power to the inverter. There is no switch-over time in a continuous UPS.

This setup provides a very stable source of power.