External Uninterrupted Power Supply

External Uninterrupted Power Supply

We all know what it’s like to lose work we’ve been doing on a computer.  After typing away for hours, someone plugs something in that trips the power or worse, the area power is cut for maintenance or because of a fault, and that document you’ve been working on for the last two hours is lost and you have to start all over again.  External uninterrupted power supply units can be a life saver in times like this.  They provide up to 30 minutes of battery backup to just about anything that runs on electricity but are almost always used for computer systems and other critical equipment, giving you enough time to save your work or restore the power.  Aside from that, they can also protect your valuable equipment from potential electricity supply problems or environmental factors that can cause a lot of damage.

What is an External Uninterrupted Power Supply?

By utilising a battery and inverter, the external uninterrupted power supply can supply any device that requires electricity after a power cut for a predetermined time depending on the power requirements of the connected device.  It is most often used in computer installations where power is critical.  There are three types of external uninterrupted power supply units – the cheaper offline type, line-interactive and online type.  

All three of these devices can protect your computer from both power loss and surges, spikes and dips but they do it in different ways – the offline external uninterrupted power supply switches to battery mode every time there is a surge, spike, sag or power loss, while the line-interactive and online versions have special circuitry built in to overcome this type of irregularity.

Purchasing an External Uninterrupted Power Supply

  • Expansys have both an online and high street store and stock a full range of external uninterrupted power supplies from the basic offline to the colossal online units that sell for well over £1000.
  • LambdaTek Component Shop sells a full range of devices from their Oxford based shop.  They also have an online store.

Estimated Costs of an External Uninterrupted Power Supply

External uninterrupted power supply units can be very costly, but by buying the right one for your needs, the cost of the device will always be cheaper than replacing all the equipment that is connected to it.  External uninterrupted power supplies cost between £35 and £300 for the type you would be using on most home installations.  A general rule of thumb is to get the best one you can within your budget – price definitely dictates quality here.  For the larger units, prices can easily exceed £300.

Given the general unreliability of power these days, and the increasing sensitivity of your electronic equipment you don’t want to be caught having no protection from it.  For a relatively small cost, you can know you are protected.  An external uninterrupted power supply unit is all you need to make sure you’ll never experience damaged equipment or data loss from inevitable power cut or power problems.