They are very important devices for computers and connecting units. We can described as systems becoming operational to keep away all electronic devices connected to it form the electricity grid of city. UPS provides constant-litude voltage interference occurred at electricity, different voltage and waves. By activating the opportunity to work uninterrupted during power failure in the battery can be provided. In short, the basic task of the UPS, against problm such as device power outages, surges etc… and without interruption in a safe manner to allow the closure to protect your computer equipment, installed during operation to prevent the deletion of information due to interruption. Also, it is different from the generators. With the property of battery it backs up the energy needs.
Importance of UPS
Our country is a country that is quite problematic in terms of energy. No longer so frequent power cuts the long term high or low voltage, sudden voltage spikes and changes of frequency are often unavoidable. In such cases, the problems facing the devices do not have adequate protection;
- Power cards may burn
- Screens can black
- Power is interrupted while writing to hard disk, all the information could be lost
- Path failures can be met
- Hard disk password protection is used, and if energy cut off during the read/write password the password may be lost
- Any part of the equipment may be damaged.
LINE-INTERACTIVE UPS
There is no regulation becasuse voltage comes from network does not pass on the battery. When the network cuts off in this system, after 2-5 milisec a relay becomes active. Even this time is very short, after a while there will be problems because of arc. It is used at small power. They are interactive systems. These systems provide to reduce the voltage under the limits with continuous observing. In case of over the voltage limits, they provide the automatic voltage regulation. They do not use battery unnecessarily in the conditions of brownout cause of their AVR systems. With this property battery’s life become longer.
On-line SYSTEMS (UPS that works continuously):
They are systems which are always kept in (inverter on). In these systems, transfer delay does not occur like in off-line systems. In such systems critical load always feeds from the UPS. UPS system must carry the load voltage all the time. While main feeding cuts off , UPS batteries provide the necessary energy for load over the inverter. Because of that there is no energy cut in the load ends.
Combi UPS (POWER SUPPLY)
In the combi UPS, load feeds from the network as long as the energy in it. If the energy cut off in the network, inverter is kept ready and becomes active. When off-line UPS is preferred, start-up time in the case of interruption should be chosen shortest. In general, it is convenient for single user computer systems and electronic devices that are not very sensitive.
How do UPSs work?
UPSs in market work in three different systems. These are;
a)off-line systems
b)line interactive systems
c)on-line systems
Off-line SYSTEMS (CLOSE SYSTEM UPS):
The mains voltage from the batteries in any way, through the regulation in question is not exceed. When the network cuts off in this system, after 2-5 milisec a relay becomes active. Even this time is very short, after a while there will be problems because of arc. It is used at small power.
Dynamic UPS
There is a motor/generator outlet in statical type power suppliers at dynamic type UPSs. Cause of the outlet is motor outlet; obtained sinus is close to the ideal ones. Such these kinds of power suppliers are used in huge industrial facilities and critical practices.
ACDC UPS (POWER SUPPLY)
In these kinds of UPSs, load feeds from the network as long as the energy in it. If the energy cut off in the network, inverter is kept ready and becomes active. When off-line UPS is preferred, start-up time in the case of interruption should be chosen shortest. In general, it is convenient for single user computer systems and electronic devices that are not very sensitive.
