The best way to protect electronic equipments from power problems is using UPS. UPS units have different sizes, from little desktop system that shields an individual PC to massive UPS that can supply power to a whole building. Nearly every organization has a power safeguard necessity, ranging from companies with computer UPS provides power to your equipment in the case of an entire power collapse, giving you opportunity to save data and close files. At a more commencing level, the UPS conditions and filters networks to hospitals, airports, oil rigs and anywhere where uninterrupted power is must. Today maximum industries are using UPSs to save their core business against mains failures, mains supply fluctuations, power surges, and other troubles in the electrical supply. The option of picking a Rotary or Static UPS for industrial applications has become contentious and the myths require rectification. Over recent years, Static UPSs have captured a large share of the UPS market when compared to the Rotary type, although Rotary UPSs still sustain popularity in industrial environments where ratings are in excess of 800kVA. The drawback is however, that Rotary technology is usually 30% more costly than the substitute Static offerings. Now-a-days, Static UPSs are a major rival for industrial installations, and the conveniences and benefits they offer, have seen consultants considering their design criteria from Rotary to Static technology. Outward appearances and inverters of Static UPS have changed amazingly in modern years with thyristor technology being replaced with IGBT technology. This recent technology has assisted notably to enhance the potency and managing of non-linear loads (computers and SMP type loads) with excessively low voltage distortion. With thyristor technology, peaks of the voltage wave form were frequently flattened, whereas this does not happen with the more recent IGBT technology. A moreover advantage of IGBT is that it minimizes the size of the inverter stacks and makes allowance for repairs to be done more effortlessly. And, owing to digitally controlled UPS design and growth in the IT arena, it is now very simple to monitor UPSs remotely from a different site or even from another country.