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What are Uninterruptible Power Supplies ?

Uninterruptible Power Supplies , or UPS, are devices that maintain a constant supply of power to any equipment connected to it.

Author: John East

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Uninterruptible Power Supplies , or UPS, are devices that maintain a constant supply of power to any equipment connected to it. Uninterruptible Power Supplies do this by supplying power from a separate source when the original source of utility power is unavailable, giving a host of benefits against disruptions. The UPS systems basically sit between a power source, like a wall outlet, and a device, like a computer. In the event of a power failure, the uninterruptible power supply will provide the necessary power to the device as a back-up. A UPS can be anything from a battery to a back-up power generator: it is typically anything that helps a device remain temporarily operational when power is interrupted. Uninterruptible power supply generators are also anything that protects the device from undesired aspects of the power source, like surges, outages, or sags.

There are two major types of uninterruptible power supplies 'off-line which is called 'line interactive' and on-line for all your power-solution needs. The off-line type will switch from the original power source to its own power source instantly should a power failure occur. By this method it keeps the device temporarily powered until the original power source is available again, or its own power source runs out. The on-line type continuously draws energy and stores it into reserves, such as batteries, and will convert it into AC power for use by the device when the original power source has failed. Typically either system would also be backuped by a standby generator .

Uninterruptible power supplies should not be confused with standby generators . Standby generators do not protect the devices they are connected to from the undesirable features of power failure: the surges, sags, or any other momentary interruption. However, standby generators can assist a UPS in the event of lengthy power failures. In fact the two systems are often incorporated in the design of emergency power systems , larger systems of back-up power designed for crises that include lighting, generators, and refrigeration that are utilized in such places as hospitals and laboratories and ideal for medical and mobility applications.

A UPS system is the perfect device to guard against power disturbances such as faults on the electric delivery system, power line poles or lightning surges that can cause blackouts. To prevent loss of data while working on a computer, install an uninterruptible power supply. The slightest drop in power or a power surge may cause your computer to freeze or automatically shut down, both resulting in lost work, data and valuable time.

Yet crisis situations aren't the only power failures to be prepared for. One should always protect the power that is used on a continuous basis: computers are a good example of this. To determine what size of power supply equipment you will need, consider how much energy you would need should power fail. Also do you need disaster prevention as well

A UPS has a VA rating, voltsamps. The rating is the maximum amount of voltamps it can deliver in a power failure . If you choose a UPS with too small a VA rating, you will not be able to power your equipment; however if you choose one with a larger VA rating than what you need, this will be fine. You will just be able to power your equipment for longer periods of time should it be necessary. Overall, it is better to error on the side of a larger VA rating. You will want uninterruptible power supplies with ratings that are large enough to deliver power to all your necessary or vital equipment and allow for future growth of additional equipment.

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What are Uninterruptible Power Supplies ?