VOLTAGE OPTIMISATION Fig.3
P-N with a reasonably accurate estimate of savings.
Depending on your chosen suppliers, various levels of savings will be offered; these can sometimes spread over a wide range. If you discount all those where the supplier did not survey the loads, this should narrow down the field. At this point, bear in mind that if all the suppliers are working to the same final site voltage, then it will the optimiser’s control that will the major contributor to the actual stated savings. The purchaser is within their rights to request a 3 phase voltage graph of the proposed optimiser (from an actual site, see Figure 3) for comparison before making any final decision.
The guarantees that offer a one off payment as recompense for not meeting estimated savings or ROI target do not compensate for the loss of accumulated short fall in savings over the life span of the optimiser. Better to obtain a realistic estimate in the first instance. Voltage optimisation is not an exact science; any estimate of savings given should reasonably be expected to be within ± 1% point of the percentage value. Verification of the actual savings is much more difficult. There are various methods IPMVP, comparisons of day/week/month/year or switching between supply and optimised voltages and comparing consumption levels. Neither of these methods is ideal. However, a combination of methods with extensive site knowledge maybe the best way forward. If you consider the problem, a site may have 5000+ loads most with individual and random on times or duty cycles, it is no wonder that an exact figure of savings cannot obtained. Watford Control has been manufacturing voltage stabiliser, regulator and conditioners for the past 60 years. We have been selling voltage optimisers (although they were not called that) for all of that time. The Powersaver is a range of voltage optimisers whose reliability is proven with time.
Tel: [44] 01536 445488
Email:
ian.reeves@
watfordcontrol.com www.watfordpowersaver.com
Voltage optimisers enable 10-15% energy savings for commercial buildings
Innovative technology is ideal for use in swimming pools, spas and other leisure facilities
nergy saving technology expert Powermaster has released a range of PowaSava voltage optimisers that reduce electricity consumption and the associated costs by up to 10-15%. The technology also protects a commercial buildings’ electrical energy infrastructure and can reduce carbon emissions across the building by 10-15%.
E By controlling the voltage from the
main supply, the PowaSava voltage optimiser ensures that the application uses only the required amount of electricity, minimising bills. The device reduces energy bills, without any noticeable difference to electrical functions, by balancing three phase supply and optimising the mains voltage. Depending on incoming voltage it can reduce costs by optimising and improving the source, which can be reduced incrementally by ±15V on the set point.
In Northern Ireland and
Scotland, Powermaster’s IWEMS® range is listed in the Carbon Trust Loan Scheme. As a result, when taking part in the scheme, organisations can benefit from 0% business loans of £3,000 - £100,000 to cover the purchase cost. It’s quite common for the energy savings alone to cover the capital cost of the equipment during the course of the loan. From April 11, 2011 the equivalent scheme in the United Kingdom will be managed by the Carbon Trust and Siemens Financial Services.
“UK Plc has been trying to improve its electrical energy infrastructure to save money and preserve the environment
PUBLIC SECTOR SUSTAINABILITY • VOLUME 3 ISSUE 3 33
for some time,” explained Geoff Renshaw, a director of Powermaster. “Our voltage optimisers are proven to increase the lifecycle of electrical equipment and reduce maintenance costs. They also help protect electrical equipment from transients, such as surges and spikes. In addition, they are suitable for operating in severe temperatures, humidity, vibration and dirty environments and can respond immediately to input and output change.” Moreover, the system also helps lower maintenance costs on motors, lighting equipment and other electrical devices by suppressing potentially damaging harmonics. It also reduces the operating temperature on electrical equipment, further extending its lifespan and reducing the need for maintenance.
www.power-master.co.uk
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