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Range of UPS Products from APC

Specialist Power Systems are an Official APC Reseller, having been working with APC by Schneider Electric as a Select Partner since 2002.
We offer a comprehensive portfolio of UPS back up power products with trained APC engineers and technical support to assist you in every part of the APC customer journey. All APC products come with an attractive warranty of up to 3 years depending on the range, 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 APC ?

For 40 years APC have been known as the industry standard for reliable power protection infrastructure and has proven itself as an industry leader. This combined with the largest community of IT partners, has produced technology that reliably delivers connectivity and accessibility.

Founded in 1981, APC are a leading provider of global, end-to-end AC and DC-based back-up power products and services, which include surge suppressors, uninterruptible power supplies (UPS), power conditioning equipment, power management software and DC power systems.

The mission of APC is to create delighted customers by improving the manageability, availability and performance of information and communication systems through rapid development and delivery of innovative solutions to real customer problems. Today the company focuses its efforts on four application areas: home/home office, business networks, access provider networks, data centres and facilities.

Over the years, APC has received hundreds of awards worldwide— more than any other UPS manufacturer. Such designations have recognised them both for their reliable solutions and overall business performance.

Not satisfied with this, they continue to work diligently to achieve their corporate mission of creating delighted customers by improving the manageability, availability and performance of information and communication systems through the rapid delivery of innovative solutions to real customer problems.

In todays “always on, always available” world where businesses can’t stop and downtime is measured in £’s, APC provides protection against some of the leading causes of downtime, data loss and hardware damage: power problems and temperature.

As an APC approved partner every APC product purchased from us comes with a leading parts and labour warranty up to 3 years depending on the range. This combined with our backup and support makes APC 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 APC products or contact us today on 01234 851155 to speak to an expert.