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| What is a UPS? |
An Uninterruptible Power Supply (UPS) will protect equipment from a blackout, brownout, power fluctuations and other problems associated with the integrity of your power supply. They are also known as battery back-up, back-up power or (incorrectly) as unstoppable power supplies.
UPS Units contain one or more internal batteries or an external battery pack on larger units. These supply 240 volts AC power in the event of power black outs or disruption in power like electrical noise, sags, spikes, surges or over-voltage conditions.
Our entry level G.E. ML Series UPS will keep a small computer and monitor running for a about ten minutes allowing for saving of files and a graceful shutdown if the blackout persists. Running time is increased with unit and battery size.
We have the range of medium sized UPS Units for networks and small business, up to large three phase units used in industry.
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| Types of UPS Units |
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| Off-line or Standby U.P.S. |
The inverter is in standby mode, when the voltage drops or rises to pre-determined limits the unit will run on battery power until the power is restored to an acceptable voltage.
Off-line UPS Units protect against the three most common problems - Power Failure, Power Sags and Power Surges. They are commonly used for a single computer.
There is however a brief lag time (less than 4 milliseconds) while the internal battery comes on-line. This downtime should not cause a computer to shut down. On-line units are recommended for servers or computers running critical applications.
Note: Off-line units are not suitable for frequent power fluctuations.
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| Line-interactive U.P.S. |
The addition of a buck boost circuit reduces the need to use an internal battery with every power fluctuation.
These units monitor the incoming voltage at all times, activating the buck boost circuit when the voltage falls below pre-determined limits. The battery is activated when even lower voltages are recorded.
Line-interactive U.P.S. units protect against power failure, power sags, power surges, brown-out and line noise.
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| On-line U.P.S. |
On-line UPS protect against all types of power problems by running constantly which offers the most protection. The connected equipment is constantly being supplied by an inverter which receives its power from rectifying the mains to DC.
The inverter continuously creates 100% new, clean and regulated AC power in all situations. The only exception is extended blackouts when the batteries eventually drain.
For more information see the link below which is in PDF format. You will need Acrobat Reader (Available here) to view this link. You can save the pdf to your computer by right clicking on the link and select "Save Target as" option.
Selecting the Correct Level of UPS Protection
PDF Document 87KB |
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