The functionality of a UPS consists in providing auxiliary power for the purpose of preserving precious data. With a laser printer, in the event of a mishap in the electrical supply, the printing tasks remain queued in the print spool and are naturally recovered once the mishap is gone. Nevertheless, for large printing cycles involving publishing houses, graphics and copiers in general, it is best to protect the data in order to cushion the large data transmission time to the printer memory.

The Uninterruptible Power Supply Systems (UPS) are not, necessary, but rather basic. Security needs demand that we protect our systems exhaustively. More and more, information technology systems are an essential element of the company in all areas.

Off-Line is the simplest protection. The PC continues to receive power through the electrical network but without energy conversion. In the event of a problem such as power outages or voltage changes, the UPS is supported by batteries in order to stabilize the voltage. The use of this technology is appropriate for the protection of PC’s, work stations, passive terminals and low range servers.

These devices operate in exactly the same way as Off-Line. The difference is that the UPS is totally controlled by means of a micro-processor which studies and analyzes the quality of the electrical network and detects the variations in said network without the need for batteries when it is not absolutely necessary. Through this technology, early wear of the batteries is prevented. The most common use of these UPS's is the protection of PC servers, Intranet servers and Internet Networking equipment. The technology of SALICRU UPS’s in Line Interactive beginning with the lowest power, 400 VA, with the SPS.SOHO series up to a higher power range with the SPS.ADVANCE range.

This technology is mainly characterized by a constant quality of power supply throughout any disturbance or fluctuation. An On-Line UPS does not constantly supply energy from the batteries, but rather the current is regenerated through the transformation of the alternating current to direct current and vice versa. In this way, it is possible to isolate the load of any fluctuation in the input current. The most standardized use is the protection of Internet/Intranet servers, and the protection of telecommunications and industrial systems. SALICRU applies the On-Line technology in the SLC.TWIN series, SLC.NEXT series, SLC.CUBE STR series and the SLC.ELITE and ELITE MAXseries.

SAI is the Spanish acronym for Sistema de Alimentación Ininterrumpida. UPS is the English acronym for Uninterruptible Power Supply.

The definition of a crest factor is the relationship between the surge current and the RMS current as it leaves the UPS. The crest factor for a resistive, capacitative or inductive lineal load or a combination of any of the three, is SQR[2]=1.41. However, for non-lineal loads, the crest factor is much higher and in some cases can even be higher than 2.5. A UPS that can provide crest factors of around 3 is a unit which is capable of providing a power supply for almost all of the loads that are currently on the market. The higher said parameter is, the better said UPS will handle non-lineal loads.

If your IT system is made up 4 computers, without a monitor, an approximate consumption of 300 VA per unit can be calculated, therefore, you must multiply the 4 computers by 300 VA each, whenever you do not have a monitor, a total consumption of 1200 VA is obtained.

First determine the VA power of the devices you wish to protect: First Option: we know the consumption in Watts: divide by the Cos phi or Equipment Power Factor and you will obtain the VA power. Second Option: we know the consumption in Amperes: multiply by the voltage V and divide by the Equipment Power Factor and you will obtain the VA power. Third Option: we know the type of equipment and the quantity to be protected: Ex: 3 PC’s + 2 Printers + 1 Server + ... Add the power supplies (in VA) of the equipment to be protected 2- Look at the selection table and determine the time of capacity range needed for the application. EQUIPMENT POWER PC 300 SERVER 600 MONITOR 17" 80 MONITOR 19" 150 MATRIX PRINTER 50 INJECTION PRINTER 150 LASER PRINTER 900 SCANNER 60

Capacity range is the time the loads can continue to feed from when there is no network or it is under the minimum voltage, for which the battery is still charged. You must measure at nominal power.