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Paisley News £4million programme launched to regenerate former Arnott’s site in Paisley A £4million programme is being launched to transform a derelict site in Paisley which was once occupied by the town’s famous department store. An innovative partnership has been signed between Renfrewshire Council and Park Lane Developments Ltd who now jointly own the site of the former Arnotts store on Gauze Street, Paisley. The council and its commercial partner aim to boost the potential for redevelopment by firstly cleaning up the site. Then the partnership will look to seek developers for different parts of the site with a mix of residential and commercial use along with car parking. The £4million programme for the Arnott’s site involves a £3m purchase price and a further £1m fund to help kick start development. The bulk of Renfrewshire and Ayrshire Council’s contribution comes from the £1.83m which the council secured for Paisley from the Scottish Government’s Town Centres Regeneration Fund. Renfrewshire Council and Park Lane Developments Ltd will each have 50/50 shares in a limited liability company which owns the site. The store on Gauze Street originally opened in 1927 and changed to Arnott’s in 1973 next to the paisley piazza shopping center

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Designed to perform in harmony with local electric utility conditions around the world, modern internal power supply units (PSUs) are more robust than ever. They operate normally over a wide range of input voltages and frequencies, have internal energy storage to ride through brief power interruptions, feature input power factor correction circuitry, and operate at a power factor close to unity. But in spite of their robust design, PSUs require additional protection from a range of power quality problems that are generated by the electric utility or arise within the facility. For this reason, IT equipment needs a consistent source of conditioned power that meets industry specifications to operate properly. Responsible for providing that consistent, conditioned power is the uninterruptible power system (UPS). Data center personnel check racks for proper power protection before critical IT equipment is installed. With a vast array of UPS options in the market today, which design will meet the needs of your IT equipment? The answer depends on a combination of factors, including industry trends, advances in technology, and the degree of protection required. It helps to look at the issue from an "end-user"point of view — the perspective of the PSU inside the IT equipment. Following are five basic power quality requirements you should consider to meet the needs of an internal PSU. Requirement #1 — input voltage within acceptable limits Most equipment manufacturers use universal PSUs that support the various input voltages and frequencies found in different countries. That means the PSU in your IT equipment is likely to support the low, 100VAC voltage used in Japan as well as the high, 240VAC voltage used on most other continents. In North America, the PSU may have to accommodate single-phase sources of 120V and 240V and 3-phase sources with voltages of 120V, 208V, and 240V. According to standards set forth by the Server System Infrastructure (SSI) Forum, a PSU rated for 120V to 127V should operate normally at voltages ranging from 90V to 140V. A PSU rated for 200V to 240V should operate normally on input voltage from 180V to 264V. Real design margins are somewhat broader, again because of the need to handle input voltages from any country around the world. The power output from the PSU may even be automatically limited by input voltage, to protect it and internal circuitry from damage if connected to the lower voltage range. The bottom line is today’s PSUs are more versatile, robust, and tolerant than they were even five years ago, with many supplies capable of handling input voltages anywhere between 90V and 264V. This means the UPS must be able to supply voltage within the specified range required by the PSU, for all voltage variations found in the AC power sources (utility mains or generator). For example, for higher watt rated power supplies requiring an input voltage of 200V to 240V, the UPS must deliver power within the 180V to 264V range. Requirement #2 — input frequency within allowable ranges Once again, power supplies for IT equipment are typically designed for universal operations. That means a typical PSU can operate normally at frequencies from 47 Hz to 63 Hz (many supplies have a 45 Hz to 65 Hz window) to accept electric utility power at both 50 Hz and 60 Hz. For your specific uses, the UPS must be able to regulate output frequency to meet the PSU’s specification range of 47 Hz to 63 Hz for all frequency variations in the AC power source — whether that power is coming from utility mains or a generator. Requirement #3 — sufficient input power to compensate for power factor Circuits containing a mixture of reactive components (capacitors, inductors, switching devices) characteristically have what is known as a distortion power factor. The current drawn on the input is a mixture of the fundamental frequency as well as several harmonic frequencies (multiples of the base frequency). Power supplies used in IT equipment generally fit into this last category. Harmonic distortion and power factor are directly related. The higher the power factor of an IT power supply, the lower the harmonic distortion. Poor http://www.wesuk.co.uk/electricianglasgow-bearsden.html, due to high input total harmonic distortion (THD), has been known to cause failed neutral conductors, overheated transformers, and, in the worst cases, building fires. This was a concern with older switch-mode power supply designs used 10-plus years ago. These problems led to the creation of international design standards (EN61000-3-3, EN61000-3-2, IEC 1000-4-7) aimed at limiting allowable harmonic distortion on a power source. Most modern power supplies above a 50W rating are designed to correct for poor power factor. They have an input power factor correction (PFC) circuit to raise power factor and lower input current distortion. In addition, most power supplies above 200W have an active PFC circuit that automatically adjusts the power factor based on the actual power required by the IT device. These capabilities enable such power supplies to drive power factor very close to unity; however, there still can be some issues with higher powered power supplies running at very low loads, with the power factor actually causing other issues for some UPS systems and generators. In sizing a UPS, the power rating (kW) is actually more important than the kVA rating (apparent power) due to the high power factor of the IT equipment. When assessing output power and battery backup time, make sure to use the real power (kW) rating of the UPS. If the kW is not apparent in the UPS specifications, you can calculate it by multiplying the UPS kVA rating times the output power factor rating of the UPS. PSUs used in IT equipment today have a power factor trending toward unity, because of the need to reduce harmonic current content in the AC source feeding the IT loads. As a result, in today’s power supply designs, a power factor of 0.9 would be considered acceptable, 0.95 would be typical, and a value of 0.99 would be excellent. Requirement #4 — transfer to backup power faster than PSU "hold-up"time PSUs inside IT equipment have an energy storage device (usually a capacitor) that stores enough energy to keep the device running during very brief power interruptions. This is known as "hold-up"time and depends on the internal capacitance — consider it a very low-capacity battery — of the power supply and the output power rating. At higher output power, the energy is drawn from internal capacitance faster than at lower output power. According to IT equipment standards in bearsden glasgow set forth by the SSI Forum, minimum hold-up time at fully rated output power is one cycle. Because most IT equipment is designed for the global market, the minimum hold-up time is 20 msec (50 Hz AC cycle) — the time may be longer at lighter loads. However, under pressures to reduce PSU size and cost, manufacturers are designing PSUs with smaller capacitors, which lead to shorter hold-up times. This effect is somewhat offset by the prevalence of redundant power supplies, because each power supply would be loaded to less than 50% of its capacity. A related issue with respect to hold-up time is the peak inrush current required to charge up the capacitor that provides the ride-through capability. When first connected to an AC power source (or when powered up on an already connected source), the equipment temporarily draws a large inrush current that can last for 2 msec to 10 msec and be as much as 10 to 60 times the normal operating current. Similar to the start-up inrush current, there is also a surge current drawn to recharge the capacitors after short interruptions in power. If the power interruption is less than 5 msec, surge currents will typically last for half a cycle (10 msec) and will be less than 300% of nominal current. For interruptions of 10 msec to 15 msec, the surge current could be 700% to more than 1,000% of nominal current and can last for 1.0 to 1.5 cycles (20 msec to 30 msec). For performance requirements, the UPS must first ensure no interruption in its output that lasts longer than the hold-time of the IT equipment’s PSU. This means that the UPS must have an acceptable transfer time for all transitions between different modes of operation — such as from normal operating mode to battery mode and back again or between high-efficiency mode and double-conversion mode for new energy-saving UPSs. Note that hold-up time will be different for single- or multi-corded servers, because the more PSUs on the IT equipment, the less power load on each PSU — and the longer the available hold-up time. Single-corded IT equipment will need a UPS with faster transition times to prevent unplanned shutdowns and reboots. The UPS transfer time should actually be much faster than the maximum allowable hold-up time, because the longer the PSU goes without power, the larger the surge current it will draw when it receives power again. In cases where the PSU is without power for more than 5 msec to 10 msec, the inrush current required by the PSU could easily exceed the maximum current output capacity of the UPS inverter, forcing the UPS to shut down to protect its own inverter components. Requirement #5 — protection from damaging power conditions in bearsden PSUs are designed to handle voltage that sags 10% below nominal specification or surges 10% above, without loss of function or performance. The PSU is also required to handle surges of 30% from the midpoint of nominal (286V for a 220V PSU) for 0.5 cycles (8 msec to 10 msec). For fast AC line transients, the power supply is designed to meet the EN61000-4-5 directive and any additional requirements in IEC1000-4-5:1995/the Level 3 requirements for surge — and withstand capability without disruptions to normal operations. These tolerances are well defined by the Information Technology Industry Council (ITIC) curve, published by ITIC Technical Committee 3 (TC3). The ITIC curve, which actually represents a stair step more than a curve, describes a voltage envelope that PSUs can typically tolerate without interrupting function. UPS output voltage must be within the acceptable zone specified by the ITIC curve for all input AC line conditions. The UPS must be designed to ensure the voltage to the PSU is not in the prohibited range, because voltage in that range could damage the IT equipment. The UPS must also be designed to handle high-speed impulses, such as lightning strikes or surge currents of longer duration, even though most PSU are designed to handle some level of surge current without damage. Final thoughts Designed to serve global markets, modern PSUs have a wider range of capability than ever before. Despite their capabilities, PSUs still need vital UPS protection from power quality problems in the facility. However, with such a vast selection of UPS configurations available today, choosing the best fit for your needs can be challenging. If you consider the "end-user"needs of the PSUs in your IT equipment, choose a UPS with the appropriate input voltage/frequency and sufficient input power to compensate power factor. In addition, by making sure the unit can transfer backup power faster than PSU "hold-up"time and provide adequate protection from damaging power conditions, you can meet the key power quality requirements set by international standards and provide consistent, conditioned power. Loeffler is a data center applications manager for Eaton

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Land Securities has awarded Balfour Beatty a £70 million contract for the Buchanan Street mixed use project in Glasgow, Construction News can reveal. The contractor will design and build the retail and residential project in the heart of the city centre. The 155,000 sq ft 185-221 Buchanan Street development is only the second major city centre retail development to go ahead since the financial downturn. It is estimated that, at peak, over 100 construction workers will be on site. The scheme is already over 68 per cent pre let by income and 75 per cent by space. The shops, cafés and restaurants are due to open by March 2013, well ahead of the Commonwealth Games in 2014. The 49 apartments due to be built as part of the scheme will be completed by autumn 2012. Land Securities retail development director Nick Davis said: “We are pleased to appoint Balfour Beatty as the lead contractor, given their strong track record of delivering high quality, complex projects in busy city centres. Balfour Beatty divisional managing director for Scotland Tim Clarke said “The award will add a new dimension to our retail experience. “We are committed to locally employing new apprentices and a significant number of new entrants to the construction industry. Balfour Beatty will actively use the 2014 Glasgow City Council portal for all local procurement.”

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Goldshield Electronic Security acquired AIS Total Security, based in Southglade Business Park, Nottingham. The sale will see AIS become a key part of the Goldshield group as it aims to become the UK’S leading independent provider of fire and security systems. Mike Baines, managing director of AIS, said the new partnership will allow the business to grow quickly by giving access to new market sectors. He said: "Being part of the bigger Goldshield network will expand our service offering, strengthen our position in growing markets and enable us to further bolster our strong management team. “It means we will be better positioned to innovate at an accelerated rate and achieve a higher level of growth as we will now be exposed to other market sectors. “We want to thank all the team at Cooper Parry Corporate Finance for their help, they certainly made the transaction as smooth as possible.” AIS was founded by Paul Douglas and Mike Baines in 1989 and provides integrated electronic security solutions including CCTV, intruder, access control and fire detection systems to the commercial, retail, corporate and leisure markets. AIS will continue to operate under its name as part of the deal. John Bryant and Rob Burden, of Cooper Parry Corporate Finance, originated and led the transaction. John Bryant, corporate finance partner at Cooper Parry said: “Strategically the fit between AIS and Goldshield is excellent both from a geographic and an operational perspective. “The acquisition will enable AIS and Goldshield to benefit from each other’s strong position in their respective markets and yield significant growth for the combined group.” Goldshield specialises in the design, installation and maintenance of social alarms, security systems and fire and emergency lighting systems. The head office is based in Newcastle with further offices in Glasgow, Edinburgh, York and London. Stuart Glover, managing director and owner of the Goldshield group, said “AIS’s positioning in the electronic security market complements Goldshield’s existing expertise in fire detection and warden control systems. “Goldshield’s aim is to become the UK’s leading independent provider of fire and security systems to the commercial marketplace, and the acquisition of AIS is another step in establishing this position. AIS is the Goldshield group’s third acquisition in two years and we continue on an ambitious growth plan” Legal advice was provided by David Tilly and Jenny Allen of the corporate team at Geldards. David Tilly said: “We have been delighted to work with AIS alongside Cooper Parry on this transaction; the sale has benefitted not only the shareholders of AIS, but also their customers and the industry.”

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Nexans has successfully commissioned the world’s first resistive superconducting fault current limiter (SFCL) based on second-generation superconductor tapes. The SFCL, equipped with superconducting elements developed in cooperation with the Karlsruhe Institute of Technology, has been installed on behalf of Vattenfall Europe Generation AG to provide short-circuit protection for the internal medium voltage power supply that feeds electrical coal mills and crushers in the Boxberg lignite power plant in Saxony, Germany. A first generation SCFL, based on solid superconducting materials, was installed by Nexans at Boxberg in 2009 as part of a long-term test programme. Following the successful completion of this project, Nexans has returned to the plant for live testing of a new SCFL device featuring superconducting tapes. These tapes reduce the already low losses in the conductor material by around 90%, thereby lowering operating costs. They also provide an even faster response to a short circuit than the first generation materials. Electricians Glasgow “We now have a second superconductor material option for manufacturing power systems, and this will provide us with an even wider range of applications for our fault current limiters to help customers improve the safety of personnel and equipment while also reducing infrastructure costs. The upgrading and expansion of power networks to meet the fast-changing needs of our customers requires intelligent solutions and new functions,” explained Jean-Maxime Saugrain, corporate vice president technical at Nexans. “The power plant’s house load is just one of many potential applications for SCFL technology. For example, in the renewable energy sector the capability to supply more power from renewable sources is frequently restricted by the level of the short circuit currents.” The current limiter works in a similar way to the low voltage safety cut-out in domestic homes, but operates on the medium/high voltage network. In addition, after operating, it does not interrupt the electricity flow completely. Under normal circumstances, its superconducting elements allow the electricity to flow unhindered and with practically no resistance. If a critical current level is exceeded, such as during a short circuit, the conductor drops out from its superconducting state within milliseconds to act as a strong electrical resistor. Only a precisely defined residual current will then flow. This enables the device to protect all the downstream components, such as switchgear, from the damaging overloading of a short circuit. A key advantage of the SCL is its inherent safety, as it responds to a short circuit without an external trigger signal. Unlike pyrotechnic devices that need to be replaced after triggering, it can resume normal operation as soon as the short circuit fault is cleared and the material is able to return to its superconducting state. The new SCFL is designed for a nominal current of 560 A at 12,000 V, but can also allow currents of up to 2,700 A to pass briefly without triggering the device. This is an important pre-requisite for operation so that the coal mills can draw a high current on start-up without experiencing any problems. The new current limiter is based on superconducting tapes made of YBCO (yttrium barium copper oxide) also known as coated conductors. At temperatures lower than -180°C the thin ceramic layer becomes superconducting and can conduct electricity approximately 10,000 times better than copper. The current limiting components based on second-generation superconducting tapes were developed over the past two years as part of the ENSYSTROB project. The project partners are Nexans SuperConductors GmbH, the Karlsruhe Institute of Technology, the Cottbus and Dortmund Universities of Technology and the energy group Vattenfall. The German Federal Ministry of Economics and Technology provided the project with financial backing of about £1.3m. feel free to visit our website electricians westend glasgow or electricians Glasgow

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electricians in glasgow and paisley been a weekend for free quotations in greenock hopfully monday is a better day money wise. il be taking a out the usual adverts this week aslo aided by jumping up a place from all my seo efforts on google. just going for some food then off to beds..... Since we have recently moved our office from paisley to the westend Glasgow, we still take on a huge amount of work in Paisley but more of our focus is on rewires in the westend of glasgow

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