Conventionally, there are three levels of protection, which provide various series of UPS models:
- base - avoids the most dangerous manifestations of instability in the supply network.This single pulses with large amplitude, but very short duration -naprimer, lightning or arcing contacts bad wiring), the periodic power outages in substations -Fan or by accident), the daily fluctuations of mains voltage due to load changes at different phases;
- improved protection - can further filter radio frequency and other electromagnetic interference as the input network and interference caused by the UPS.This improves the compatibility of electronic devices during their joint operation;
- absolute protection - guaranteed to get rid of all possible faults in the supply network to the same value stabilizes and corrects the power factor and the shape of the output voltage, thereby significantly extending the life of the connected equipment.
What criteria should guide the choice of UPS in the first place, what technical options should be considered?
in the general table illustrating the scope of UPS and the three levels of protection.The table shows the most important characteristics, such as technology, power form an output voltage and the corresponding level of protection.
course, an important role in choosing the play, and other technical parameters of the UPS battery backup time, the interface port and interacting with the software, the ability to increase the backup time using the connection of external battery packs, the availability of electronic and / or manual bypass (bypass)Input voltage range without switching to battery power, the transition to the battery dimensions, weight and design.
In the description of each model in the corresponding section details the these characteristics.
When you select UPS should also take into account the characteristics and specifications of the electrical equipment to which you plan to connect an uninterruptible power supply.The table will make a preliminary selection of the device, depending on the application and the desired level of protection.Consider
Table appointments and UPS applications (for example, UPS Powercom)
|protection level||Technology||Output waveform||Power||Scope|
|absolute||On-Line||10-200 KVA||centralized uninterruptible power supply system, industrial equipment for continuous technological processes and equipment for the military industry to computing, situational centers, med.pribory life support, etc.|
|6-15 KVA||Responsible telecommunications and networking equipment, medical diagnostic equipment, instrumentation control and automation, audio-visual equipment, centralized, clustered servers, workstation, a group of computers, etc.|
|700 VA-20 KVA|
|improved||Line - interactive||600 VA-5100 VA||workstations, servers, groups of computers, telecommunication equipment and communication systems,trade equipment, cash registers, fire and burglar alarm systems, emergency lighting, etc.|
|800 VA-3 KVA|
|base||Line - interactive||400-2000 VA||of computer,peripherals, network equipment easy|
|off - line||300-700 VA||Personal computers, computer peripherals, fax machines, DVD, audio equipment, telephones, modems,et al.|
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