Pioneering solutions for total power protection

In today's 24/7 on demand world, mission-critical business systems must be available 100% of the time. Downtime cannot be tolerated, which is where an uninterrupted power supply can assist. At Uninterruptible Power Supplies Ltd, we pride ourselves on delivering industry-leading power protection solutions combined with service excellence to ensure systems are 'Always ON'.

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  • Uninterruptible Power Supplies Limited (UPS Ltd), a Kohler company, introduces the POWERWAVE EL series: efficient power for emergency lighting and safety equipment. 


    The PowerWave EL 100XA Series

    Uninterruptible Power Supplies Limited, a Kohler company, today announced the launch of PowerWave EL, designed to deliver complete emergency lighting protection for businesses. The PowerWAVE EL series addresses the need for a range of high performance static inverters and is manufactured using state of the art technology, giving your operation the peace of mind it needs. 
    Most commonly applied to emergency lighting, central power, fire alarm and safety systems, the PowerWAVE EL come in a range of options. All boast true double conversion and PWM technology, are capable of 120% continuous overload and have optional parallel modes. UPS Ltd’s intelligent battery monitoring maximises service life and a galvanic isolation transformer is included as standard. 
    All products in the PowerWAVE EL range offer high reliability with low maintenance and operating costs, ensuring power continuity for your emergency operations. The PowerWAVE EL 100XA Series, a high performance static inverter (500VA to 3000VA), allows for an internal self-contained battery system capable of supplying standard emergency lighting for 3 hour autonomy. 
    PowerWAVE EL 100 Series is a single phase input and output online static converter (4kVA to 12kVA), provides a solution for higher power, single phase loads, whilst the 200 Series and 300 Series offer solutions for higher power and three-phase loads. 
    The PowerWAVE EL 200 Series also has a three phase input and single phase output static inverter which scales from 10kVA to 30KVA, whereas the 300 Series has a three phase input and output static inverter suitable for 10kVA to 160kVA.
    At UPS Ltd, we offer a range of emergency lighting products depending on your business requirement and specifications. View our complete PowerWave EL range.
    Uninterruptible Power Supplies Ltd (UPS Ltd), a Kohler company, announces the launch of the updated PowerWave 6000 UPS, with best-in-class performance delivering up to 5 MVA of clean, reliable power.
    Uninterruptible Power Supplies Ltds newest UPS for datacentres: the PowerWave 6000, a true online, double conversion UPS system that offers intelligent energy management and maximum power protection with class-leading efficiency (up to 96%), all in a smaller format to maximise revenue-earning floor space. 
    The transformerless PowerWave 6000 is superior in its class in terms of energy efficiency, availability, lowest total cost of ownership and power performance. This has been achieved due to the PowerWave’s transformerless design and its Energy Saving Inverter Switching (ESIS) technology. 
    This ESIS technology allows a significantly reduced total cost of ownership and operating costs as the PowerWave 6000 has been designed to provide highly efficient power protection and extend the lives of its batteries and components, saving money and maintenance costs. The integrated enclosures can accommodate batteries for 60kVA, 80kVA and 100kVA which are then configured to match the required autonomy, saving energy. 
    The PowerWave 6000 has been designed as a green solution for critical applications and as such is listed on the Carbon Trust’s Energy Technology List for Enhances Capital Allowances (ECA) which offers  tax-relied incentives to promote the use of machinery that is superior in their energy efficiency.
    The new range of PowerWave 6000’s streamlines from five units to four, that greater meet the power support needs and variations of our customers. 
    Speaking of the latest addition to UPS Ltd’s power protection offering for datacentres, Alan Luscombe, Marketing Director at Uninterruptible Power Supplies said: “We are proud to have improved our best-in-class PowerWAVE 6000 range to bring our customers a more efficient product that can enhance the eco performance of their company, offering valuable savings in both power and floor space.”
    Installation is easier and cheaper with this reduced footprint combined with a 50kg weight reduction. The new unit has improved efficiency in partial loads (up to 96%) as well as maintaining the best-in class performance of 96% when supporting a full load.
    Single unit capacities are from 60 kVA to 500 kVA and the units are 10x parellelable, achieving up to 5MVA. The PowerWave 6000 60-120 kVA UPS system will replace the previous unit that was 60-100 kVA and the 120-200 kVA is replaced by a model ranging from 160-200 kVA. 
    View the PowerWave 6000’s full product information and specification online here
    Uninterruptible Power Supplies Ltd (UPS Ltd), a Kohler company, announces the launch of the PowerWAVE 3000/TP UPS, providing up to 20 kVA of clean, reliable power. 
    The PowerWave 3000/TP is the latest transformerless UPS System from Uninterruptible Power Supplies Ltd, capable of supporting up to 20kVA of transient-free, pure sine-wave AC power for single-phase applications with higher efficiency and reduced running costs. 
    The newest addition to the PowerWave series, the PowerWave 3000/TP has been designed specifically to accommodate one or two independent power sources, protecting small to medium business’s critical applications to ensure a source of power even during severe mains supply disturbances. 
    The system offers simple management in a compact tower format, high reliability and high efficiency (up to 97% when running in eco mode), saving your business more time and money than ever before. Reduced heat loss also allows a lower operating temperature, prolonging the lifetime of the 3000/TP’s components and batteries. 
    The PowerWave 3000/TP is simple to maintain, with options for autonomy and battery cabinets that are external or built in for a maximum of 16 minutes’ running time. Battery tests can be programmed or automated for optimised battery operation, management and lifetime. 
    Speaking of the latest addition to UPS Ltd’s offering for small to medium businesses, Alan Luscombe, Marketing Director at Uninterruptible Power Supplies said: “The new 3000/TP solution for 10-20 kVA applications offers improved power factor, input THDi and the flexibility to configure for three or single phase inputs. Four units can be paralleled, providing a top of the range system you can rely on.” 
    The PowerWave 3000/TP from 10 to 20 KVA succeeds the PowerWave 3000T UPS System from 7.5 kVA to 20 kVA. The 3000/TP UPS systems are available in 10kVA and 20kVA variations and the parallel capability  can enhance the power support facility as your system grows or can  provide system redundancy. 
    For more information on the PowerWave3000/ TP click here.
    All UPSs and associated system components need periodic maintenance and occasional parts replacements to ensure optimal reliability. They also need the security of an emergency call-out facility, as failures can occur in any electrical equipment, no matter how well-maintained it is.
    In this article, Kenny Green, Technical Support Manager at Uninterruptible Power Supplies Ltd, a Kohler company, looks at these elements of effective maintenance. This review shows how such elements can contribute to an overall plan that assures the UPS system’s uninterrupted availability over periods of many years.
    Most electronic and electrical equipment, no matter how well-designed and built it is, will fail eventually unless it is maintained according to its manufacturer’s instructions. On rare occasions, maybe after suffering adverse environmental conditions, even well-maintained equipment can fail.
    Failure-induced downtime is unacceptable for any commercially-used equipment, but it’s particularly serious for UPS systems; if they go offline, they compromise all the equipment they have been installed to protect. Fortunately, there are a number of steps, at several levels, that UPS operators can take to minimize this exposure.
    The highest-level steps to ensure availability include keeping the UPS in optimum condition within a clean, dry, tidy and well-lit area, and checking that all alarms and indications are recorded, logged and reported correctly. Responsibility for the UPS and its associated equipment should be assigned to a named member of staff, and a suitable maintenance contract negotiated with a reputable UPS specialist.
    This maintenance contract should cover three key components: A regular testing and preventative maintenance schedule; emergency call-out facilities with a guaranteed response time; and a policy for end-of-life component replacement.
    The maintenance schedule should be designed to include all the UPS installation’s major parts, which are the UPS itself, the battery and the generator if present. The schedule will be based on a planned programme of visits in which service technicians perform inspection and maintenance as required.

    Regular UPS maintenance

    For the UPS, meters and instrumentation should be checked for correct operation, and any meter readings checked, recorded and verified for accuracy. Local and remote monitoring panels and communications channels, as well as indicator lamps, should be checked for correct status indication. Switchgear and circuit breaker operation should also be proved.
    Environmental conditions should then be reviewed, starting with actions as simple as removing any material and obstructions from around the equipment, and checking for any abnormal conditions. Ensure that airflow in and around the installation is unimpeded while changing any air filters that are due for replacement.
    The equipment itself should be checked for evidence of excessive heat, noise or vibration, as well as signs of damage to components or to power and control wiring and connections. This includes looking for swelling and leakage on ac and dc capacitors. Power supply voltages and waveforms, together with the overall UPS operation, should be checked.
    The service plan should also identify the degradation of any critical components, allowing repairs or replacement to be performed before a fault occurs. Backup spares should be available immediately on demand.

    Battery inspection and maintenance

    Traditional batteries such as open-vented lead-acid types could be checked using low technology methods such as visual inspection and voltage testing. These are not possible or effective with the Valve Regulated Lead Acid (VRLA) batteries found in most UPSs today. However, methods appropriate and effective to VRLA technology have been available for many years and are now widely used. The most important of these is battery impedance testing.
    This approach depends on age-related changes in battery impedance. The internal impedance of a new battery is low, and measured in milliohms. As the battery ages its impedance increases marginally due to normal internal corrosion. For healthy batteries, this rate of increase should be uniform across the single and parallel arrays of serial battery strings that comprise them. Any battery, or group of batteries that shows an impedance increase higher than the others becomes suspect.
    Battery impedance testing is useful and convenient, because it is easy to perform, and almost all battery problems manifest themselves as a rise in internal impedance. These include a loss of electrolyte due to venting through overcharging, leakage through seals, or sometimes migration of electrolyte between cells. Occasionally, excessive corrosion can cause loss of metal area or even disintegration within a battery. To perform the test, pass an AC current at a level related to the battery Ah rating through the battery; then use this value together with the millivolt reading across the battery terminals to calculate the internal impedance.
    Regular impedance testing will track battery condition and allow accurate prediction of the end of the battery’s reliable working life. Results can be computer-generated, as shown in Fig.1. This chart, recorded near the end of a battery’s life, shows how impedance readings provide a better indication of problems than float voltage readings do. Impedance readings for blocks 8 and 9 are high, revealing problems not made visible by voltage readings.
    Fig.1: Impedance graph for battery at end of its working life
    Impedance testing has a useful complement in load bank testing; connecting an artificial full load to a battery and monitoring its performance during discharge. This is the only way of measuring battery capacity at the time of the test, and proving the integrity of all components and interconnections. It is a valuable tool, for example, to prove after commissioning that the battery will support the specified load for the specified time. However it should be used sparingly as it completely discharges the battery; the load is denied of full support until recharging is complete. Also, completely discharging VRLA batteries in this way reduces their life and carries some risk of permanent damage.
    Permanently-fitted fixed battery monitoring systems provide another diagnostics solution. These allow continuous monitoring of battery voltages, current, temperature and impedance, and can detect differences between individual battery blocks during any charge/discharge cycles. As such systems are relatively expensive, they are used mainly in battery installations that are large or considered highly critical.


    Generator and overall system checking

    Generators, which are frequently part of a site power protection plan, should also have a regular service program. This should cover all major generator components, including the cooling, fuel and lubrication systems, the starting system and mechanical parts, and control panel. Insulation and load testing should also be performed.
    As well as planned maintenance of the UPS, battery and generator components, occasional testing of the entire system is also worth considering. This test could ensure that the automatic mains failure (AMF) equipment functions correctly, the generator starts properly, the UPS accepts output from the generator successfully and the batteries recharge normally.

    Emergency call-out resource

    Even good-quality, well maintained equipment can fail occasionally, so any scheduled maintenance plan must be complemented by an emergency call-out service. Different options should exist to allow UPS users to balance response levels against cost. Typically, telephone support will be available 24/7/365, while a guaranteed time within which a service engineer arrives on site following a call-out can be negotiated. Similarly, levels of spareholding can be discussed and negotiated.

    Uninterrupted availability now and into the future

    UPSs exist entirely to protect other equipment, often on a large scale and running business-critical applications. Accordingly, providing protection for the UPSs themselves becomes essential. Fortunately, this can be effective provided that good quality, well-specified equipment is installed and maintained regularly, with provision for a rapid, robust response if a failure should ever occur. By following these guidelines, UPSs can offer the protected equipment’s owners and users the level of uninterrupted availability they have come to expect, now and for several years of continuous operation.
    For more information of the service options UPS Ltd offer, please CLICK HERE

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