MGE Office Protection Systems

The main UPS Technologies

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UPS technologies


The most frequently-used technology for protecting PCs in an environment with little electrical interference.

The PC is normally powered from the EDF mains supply with no power conversion. Its operating principle is sequential (on mains/on battery). If there is a power failure, or a drop or increase in voltage, the UPS takes power from its battery to provide a stabilized power source. Off-line technology is not suitable for use if there are frequent disturbances (industrial or rural environments).
Advantages : low cost.
Drawbacks: the application is affected by all current fluctuations outside accepted tolerance limits.More about Off-line technology

Line Interactive

Mid-range technology, for protecting single station servers

It operates in the same way as an Off-line UPS. The UPS uses microprocessor control, monitoring the quality of the mains supply and responding to changes.
A booster, (voltage compensation circuit), is activated in the event of an extended dip in voltage.
Line interactive technology, as with off-line, is not suitable above 3 KVA.
Advantages: it can alleviate extended drops in voltage
Drawbacks: it does not provide complete protection.More about Line Interactive technology

Double conversion

Top of the range technology, for centralized protection of servers, to guarantee a constant quality of supply, whatever the fluctuations on the mains.

  The On-line UPS only uses its batteries in the event of a power cut: the current is fully equalized by transforming the AC to DC, then back to AC again. This continuous double conversion process reduces the effect of any electrical disturbances which could damage a computer, thus providing fail-safe protection. It is essential to protect installations which are critical to the business, and to provide continuous protection.More about On Line technology