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Range of Products from Riello UPS

Specialist Power Systems are an Official Power Reseller and Authorised Service Partner for Riello UPS.
We have been working with Riello UPS since 2002 when the company was formed. All our engineers are factory trained and approved, so in the unlikely event of a problem with your Riello UPS, we are here to help. Because of our partner status, all Riello UPS products from Specialist Power Systems come with an industry leading 5-year (under 3kVA) or 3-year (over 3kVA) parts and labour warranty for that extra peace of mind.

What is an Online UPS?

An online or double conversion UPS, takes the input AC (Alternating Current) mains and supplies a rectifier which then converts this AC source into DC (Direct Current). The batteries are then usually connected to the DC bus created by the rectifier. Charging of the batteries can be done directly via the DC bus or via separate DC Charging circuit.

The DC supply from the rectifier supplies the Inverter section so that the load is always protected by the inverter and thus maintains a constant output supply regardless of the mains input voltage. Whilst the inverter tracks and synchronises its output waveform to that of the incoming supply the output voltage and frequency are maintained at a constant preset value. The ability to synchronise with the mains allows the UPS to switch from inverter to mains supply seamlessly in the event of a fault, overload or for maintenance purposes.

In the event of a mains outage the DC Bus and inverter are supplied directly from the batteries without any break in output supply.

The conversion from AC to DC and back to AC offers the best protection from all mains deviations and is where the term double conversion is derived.

What is a Line Interactive UPS?

A line-interactive UPS keeps the inverter online at all times and simply switches from charging mode to battery power in the event of a power failure.

With this topology, the UPS inverter is always online and thus the protected load benefits from a constant preset output voltage. When the input AC power (mains supply) is within tolerance, the UPS inverter acts in reverse and is able to charge the batteries. If the input power fails, the transfer switch will open and the power will flow from the battery, through the inverter to the UPS load. A line interactive UPS also incorporates an automatic voltage regulator (AVR) which utilises  transformers to either boost or reduce the incoming supply should it fall just outside of the preset input tolerances. This feature prevents the batteries from being discharged when the input source is unsteady or unreliable but only slightly outside of an acceptable voltage window. There will also be additional filtering and there is no break in output supply in the event of a mains disturbance as the inverter is always connected to the critical load.

What is an Offline UPS?

In an off-line or standby UPS system, the critical load is powered directly by the utility or mains power during normal operation.

The UPS monitors the incoming supply and the inverter, which is supported by a battery system, is only activated once the input voltage falls outside of preset voltage or frequency tolerance windows.

There is a very short break in supply (typically 2-3 mS) while the inverter transfers online. This break in power is fast enough that almost all electrical and electronic equipment supported will continue to operate unaffected. The UPS incorporates a surge suppressor and in-line filter to condition the mains supply fed to the load although any variations in input voltage and frequency are not adjusted.

Who are Riello?

Riello UK is a member of the Riello Elettronica Group and has subsidiary companies and support offices across the world, making Riello UPS one of the four largest manufacturers of Uninterruptible Power Supplies and Standby Power Systems in the world.

Riello UPS’s award-winning range incorporate solutions for every application, from domestic use and home offices through to factories, utilities, and data centres. This award-winning range of Uninterruptible Power Supplies can be specified for use across most business-critical data centres and servers in use. In an age where demand for both storage and processing capacity continues to increase, energy management is becoming more and more important. 

Riello UPS’s R&D is constantly striving to improve efficiency for all their UPS ranges in the critical power protection sector. They were the first European UPS manufacturer to implement an Eco Energy Level rating, which demonstrates the great environmental performance of their products. This combined with Specialist Power Systems industry leading service support makes Riello UPS one of the most cost-effective options for UPS power protection.

Click one of the options above for more details on our comprehensive range of Riello UPS products or contact us today on 01234 851155 to speak to an expert.