Emergency power is one of the key elements in the draft each server room. The most commonly used are the so-called solution. bezprzerwowe power supplies, known more widely into English acronym UPS (uninterruptible power supply). Power supplies of this type have two basic functions - ensure uninterrupted telecommunication system and protects the device before forming it too high tension.

First of all, because of its akumulatorowi enables them to sustain the work of the server in the event of a break or disruption of electricity supply. The aim is to maintain primarily to enable the safe use servers to save data and the exclusion of all servers and network companies. Time sustain depends on many different factors, such as battery capacity and power consumption of devices connected to the system. Typically, however, it is no more than 10-15 minutes.

While the typical home computer needs a power supply emergency power of not more than 1000 (1 kVA), the UPC used in serwerowniach batteries have a much greater capacity. Most installs a device with a capacity of at least a dozen kVA, although the equipment in large serwerowniach is usually protected by power supplies for up to 500 kVA, a time often sustain more than an hour. One of the most important parameters defining the bezprzerwowego class of the power supply is its overhead (redundacja) - a sort of "spare capacity", provided under the excess of demand for it. The overhead is higher, the supply system is more reliable and less risk of incurring losses.

The second function of the UPS to protect connected devices against sudden jumps in voltage electricity network. This increases the lifespan of active gathered in the server room, and their reliability, and thus - to protect company data.

UPS can be placed in cabinets, distribution, but also often used free-standing equipment. The predominance of the former lies in the fact that they do not occupy space on the floor server room. Regardless of the form, power supplies bezprzerwowe connects between the source of power, and the device or devices, which are to be protected by them.