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UPS ( Uninterruptible Power Supply) or UPS are devices that can provide power for a period of time corresponding to the design capacity to maintain the operation of the computer or electrical equipment when power trouble .

The article introduces the reader concepts and mechanisms of action of the two product lines and UPS Offline Online to help you read the appropriate choice

Concept

Hình 1

The operating principle of the modified UPS based on DC voltage from the battery into alternating current suitable to the requirements of the computer. Besides the main function is redundant UPSs , some UPS also add other functions such as automatic voltage regulator , steady frequency , pulse control , noise filtering or Surge Protection.

Classification UPS

Based on the principle of operation, UPS is classified into two main product lines are Offline and Online. Offline UPS provides output currents near sinusoidal waveform , flow technology online double conversion online (Online Double Conversion) , supply output currents sinusoidal waveform standards . Besides, Offline UPS line is divided into two branches is offline standards and improved technology Offline Line Interactive.

UPS offline

Offline UPS Standard is the most popular product lines on the market today and are cheaper than the Offline UPS Line Interactive technology support . The operating principle of the standard Offline UPS input power transfer switch goes through the load circuit before use . UPS now only use the charger ( charger ) to charge the batteries fully charged . Where the unstable power ( too high , too low or power loss ) , the UPS automatically switches (via relays ) , used batteries from the device level to sustain operations . ( Figure 1 )

The operating principle of Offline UPS Line Interactive technology UPS line is similar but has more standard offline voltage regulator circuit to adjust the output voltage to the load level for stable use . Where the grid voltage is too high or too low , Offline UPS Line Interactive technology , automatic voltage regulator circuit switches to another notch so that the output voltage to ensure proper load demand. ( Figure 2 )

Hình 2

Design of Offline UPS line is only suitable for use in the office equipment and computers; these devices feature resistive load. Switching time delay of slow Offline UPS line, about 10 ms (milliseconds) and can not extend the time to save battery power by electricity stored in and external mount. Particularly with Offline UPS does not support the standard voltage regulator function.

UPS Onlin

Online UPS line is often designed with large capacity , can extend time by UPS UPS battery mounted within and external to the device external resistive load characteristics such as office equipment , computer, Online UPS can use for server systems , data centers ( data center ) and even the engineload devices such as fans, pumps, etc ..

Completely overcome the disadvantages of Offline UPS line, line UPS Online Double Conversion Online technology eliminates the problem of electricity due to the input voltage is always prepared before the load used. Mains power not supplied directly to the device that is converted into direct current for battery charging and inverter (inverter). Inverters will continue to transform the direct current voltage received appropriate output device used. Thus can see that when the grid occurs any trouble does your device remains secure. (Figure 3)

Select the appropriate UP

Determine the need to use , time of use and the total power of the device is the need to consider criteria for selecting suitable UPS . For example, with personal computer use in office or family , choose Offline UPS line . With a host system or data center , the UPS Online is a top priority .

Besides, if you need to extend use to be able to complete the backup or shut down the system properly, you should choose a scalable

Hình 3

UPS with UPS battery (internaor external ) . Also, some UPS management software also comes to help users monitor the operating status , UPS management flexibility and more reliable grid power failure

Select UPS is not difficult but the problem that many readers encountered was lack of information products or counselor inaccurate. Ideally, you should seek help from the technical support department of the company or the official distributor for advice and choose accordingly. With UPS Santak , you can refer to the UPS http://santak.com.vn or APC , refer www.digiworld.com.vn

according to PCWorl