Not all UPSs are the same
Technology inside UPS units have advanced quite significantly in recent years. Before you purchase, it's best to know which technology will suit you best.
Line Interactive/Inline Technologies
The input voltage is controlled and filtered by the UPS before being delivered to the materials. The power supplied is therefore of a better quality. A voltage control function enables the continual supply of quality power even where there are significant variations and without using the batteries, the use of which is governed by a number of charge cycles. The presence of a filter and a surge protector serve to heighten the safety. In the instance of a power cut or big disturbances, the UPS transfers to battery mode (owing to the commutation time, Line Interactive technology is recommended within areas where the wall power outlet is moderately disturbed
Online/Double Conversion Technologies
Power is continually delivered by the UPS, which additionally guarantees constant voltage without parasites. The protected appliance is therefore totally disconnected from the wall outlet power, consequently the commutation time is nil, avoiding micro-cuts. The tests demonstrate that On Line UPSs offer the most stable output voltage and the best defense against parasites. On Line technology is specifically recommended within industry. It is also selected to protect systems where even the slightest loss of data is unacceptable such as for example calculators, automation, cash registers, large IT systems and on a general note, all strategic applications, sensitive electronic systems and medical appliances