There are basically three types of UPSs to choose from. Keep in mind that each manufacturer has their own design and changes.
This design is considered to be a "true" UPS. Unlike the other types of UPS, this one uses the battery as its main source of power and the line power is the secondary source of power. When line power goes out the UPS does not have to convert from one power source to another, it just stops charging the battery. This is similar to the way laptops react when they are unplugged from line power. When there isn't any line power the battery will keep powering the system until its stored power is depleted. Since this type of UPS design runs off the battery, the equipment plugged into it will always maintain a constant flow of power. Any surges or brownouts will be taken in at the battery charger and not passed on to the equipment.
An uninterrupted power supply (UPS) allows for computer hardware to continue functioning during power outage failures and is a vital commodity for most modern business operations. As a result serious consideration should be given when selecting the correct UPS for your business. Here are some of the considerations which you should take into account when selecting a UPS for your business.
Firstly consider your budget. If you have an unlimited budget consider "on-line" UPS. An on-line UPS is simply refers to one which is constantly active and will give you unlimited backup power through a rechargeable battery. If you have a limited budget however, then an off-line UPS may be more appropriate. An off-line UPS refers to one which is only active during a power failure. A further consideration to make with regards to budget is whether or not to supplement the UPS with a standby generator, also known as a backup generator. Backup generators are often used alongside UPS battery systems as an extra precaution.
The next thing to consider when looking into the installation of a UPS system is your power requirements. You should always choose a system that is capable of equalling the total power requirements of the equipment you will be connected to and is advisable to install a system that is capable of exceeding your critical power requires
Being more complex, online UPS units generally costs more than offline units. They are generally used only in larger and mission-critical installations.
It is advisable to look over the specifications of the UPS you are considering to buy. If you need more backup time, then you must buy a larger UPS. It must be noted that buying a larger UPS does not always give you more backup time. The size and type of battery used in the UPS has a lot to do with it. UPS batteries are rated in Ah (ampere-hours). Ah represents the amount of energy a battery can hold. This measurement helps determine how long the battery will power the equipment it is used in. The more 'Ah' the longer the run time.
Uninterruptible power supplies are like a parachute. You desperately hope that you never have to use one but when you do, you want it to work! Like parachutes, there are many types of UPS such as line-interactive, off-line, online double conversion, Digital Online. But they all serve the purpose of protecting your system from crashing in the event of a power failure.
As stated above, there is a wide and ample variety of UPS technologies available, but deciding which technology is right for different and specific task can be difficult. UPS using on-line technology are better suited to serve in the central server and data centre, offering regulated output, efficiency and accessibility almost comparable with line-interactive types of UPS, tightly regulated output units, low reflected input data. Because of the advancement in power switch devices, this task becomes easier. Nowadays, on-line UPS are not only reaching pricing techniques with the line-interactive alternatives but also offering higher levels of performance.
Applications and technology for off-line types and line interactive types UPS have slowly and constantly been changing for server and central applications. These technologies are falling out of the track mainly because of the long and delayed transfer time and poor mains regulations and efficiency which for modern computer applications is an unnecessary risk. The risks include stoppage, delays, data loss etc. As per the estimation, more than one-third of the direct as well as indirect energy (air conditioning units etc) which is used to provide power to an uninterruptible power supply is wasted due to low efficiency, attachment of unnecessary equipment and poor load arrangements.