How to choose correct UPS?


An Uninterruptible Power Supply (UPS) is used to protect critical loads from mains supply problems, including spikes, voltage dips, fluctuations and complete power failures using a dedicated battery. Whilst the standby generator started and synchronised, meanwhile UPS system can also be used to bridge the gap.
·         Existing Installations Consider a central back-up system to eliminate expensive re-cabling. Wise to involve a company specialising in power conditioning.
·         New Installations Access the level of power protection required. Some installations may demand that every item is supported by UPS, others may only require UPS for a central server and one or two workstations.
·         Type of Client/Application Emergency services, financial institutions, Industrial etc. This can have an impact on the system specification.
·         Site Location Inner city areas may be more susceptible to power fluctuations. Rural areas may be affected by weather conditions on power lines. More remote areas may be located at the very end of the power line.
Basically there are 3 types of UPS: Standby,Online & Line interactive
Standby
Standby UPS is also known as Offline Ups or standby power supply are most an inexpensive version of the UPS.
This type of UPS will feed power directly from the wall to the power supply of the computer until a power outage. Once the power goes out, the UPS will switch to using it’s internal battery to power the attached device. The biggest drawback to this version is that the UPS waits until it detects that no power is coming from the wall before it switches to battery power.





Online
Online UPS is also known as souble conversion UPS and are similar to Standby UPS but have some notable differences as well. In an Online UPS, the power comes from the battery of the UPS and the power from the wall is constantly recharging the battery. If the power goes out, it will keep running until the battery dies.

Some of the benefits of using an Online UPS is that there is no “transfer time” should you lose power. Second, and maybe even more importantly, is that by having all the wall power going through the battery, there is another level of protection from any surges or drops in voltage coming off the wall power. Surges and voltage drops can wreak havoc on computer systems and even potentially cause damage.

Online UPSs are generally only available in larger sizes over 5,000 VA. They usually come in at a higher price point than Standby UPSs but can result in substantial energy savings costs for large units and more substantial protection overall.


Line Interactive
Line Interactive UPS are totally different from the Standby or Online versions we already discussed. In a Line Interactive UPS, the power from the wall flows in to the Inverter/Converter in the UPS. The power is then split in to both AC and DC current. The DC charges the battery of the UPS and the AC flows to the power supply of the computer. When power is lost to the wall, the computer gets all of its power from the battery in the UPS. Line Interactive UPS do still have transfer time when power is lost, but it is a faster response than in Standby models. Additionally, Line Interactive UPS “filter” the AC current coming from the wall through the inverter, so they smooth out the static and spikes of wall power that could be transferred to the computer.
Emergency power surge and sudden loss of power are two main causes of damage to systems and other electronics. Downtime caused by power outages is frustrating for anyone, but can be financially crippling for a business or organisation.
Even cheap power strips will do a decent enough job protecting against the power surges, but they offer no protection against drops in line voltage, brownouts, blackouts, and other power supply issues.
Every year, billions of dollars are lost due to downtime caused by power disruptions that could have been prevented by a UPS. Small to medium-sized businesses may be at most financial risk due to a limited ability to generate revenue during downtime.
Some key features to understand while choosing Ups system
·         Energy saving models
·         Communication ports
·         Multifunctional LCD panel
·         User replaceable batteries
·         Lithium batteries
·         Extended runtime and muted alarms
·         Hot/swap battery replacement
·         Remote power management

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