Although the UPS is required to provide clean, continuous and regulated power, it has to negotiate at its Input, a kind of supply which is full of Abnormal Spikes, Sags and fluctuations, termed as ‘Brown Outs’. These totally erratic occurrences are normally a result of Lightening, Electrical disturbances of motor load etc,and are very harmful to the smooth working of the system. Crotech offers a standard range of ‘power purifiers’ from 1KVA to 5KVA (in Four ratings), in single phase configuration, which are add-on boxes that take care of most of the ‘Brown Outs’ and allows the UPS to function smoothly, thus taking care of, primarily the ‘Black Outs’.