Next generation UPS

Emerson Network Power, a player in the digital network infrastructure industry, has announced the introduction of Liebert NX, the next generation of medium sized uninterruptible power supply (UPS).

Liebert NX stands out for its enhanced performance in terms of scalability, redundancy and high availability of quality power combined with an outstanding availability-to-price ratio.

Available in four models, ranging from 30 kVA to 80 kVA, Liebert NX is an on-line UPS system, using double conversion topology, with DSP-based fully digital control. Designed for power availability and power quality sensitive critical network and hyper-critical applications, it offers advanced protection from any power anomaly to mission-critical applications.

Launch of UMD

Typical UMD system with battery for 2 x 30 kW AC-motors and 15 minutes mains outage
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Swedish company Kraftelektronik introduced a new version of its UMD system (uninterruptible motor drives) for continuous operation in crucial processes.

The system is designed to secure the continuous operation of critical motor functions in connection with gas and steam turbines in case of mains supply outages. Functions to be controlled include lubrication oil pumps, ventilation fans, cooling pumps, jack-oil pumps, turning gear etc.

The system contains variable frequency drives, which controls the motor operation at normal AC conditions, but also from a DC battery system in case of outage. The changeover from AC to DC operation is instantaneous. This means, that an extra emergency system including DC motors is not needed and that the ordinary AC motors secure a continuous operation of the critical functions.

The elimination of a separate emergency system represents considerable savings in investment costs, space and maintenance. A state-of-the-art speed control function increases efficiency and can replace throttle control for smoother regulation and optimized motor and pump size.

Workshop is UK’s only approved equipment servicing facility

Westfalia Separator, based in Milton Keynes, UK, has upgraded its workshop facilities making it one of only a handful of workshops in the world approved to service Westfalia equipment. The quality is independently assessed and monitored by TUV to ensure that it will remain at the highest possible standard.

The existing operating procedures were revised significantly under the new company regulations. Westfalia has also upgraded its record-keeping systems to maintain a complete record of all its machinery operating on site throughout the UK. This helps the company to ensure that equipment is safe and operating efficiently.It also provides valuable information that is kept centrally at the head office in Germany and accessed through the company’s SAP computer system.This keeps the service histories of all Westfalia machines worldwide to help predict service requirements and rectify faults quickly.

Perhaps the most important change is the verification of the quality of the workmanship and documentation provided by TUV approval.TUV will inspect the workshop every three years to ensure that quality standards remain high.

NZ’s largest hydro power station installs time saving equipment

Specialist precision on-site machining equipment has saved time by enabling a generator frame stator core support ring to be restored to flatness at New Zealand’s largest hydro power station.

The project was undertaken by Furmanite as a subcontractor to Alstom’s Power Group in New Zealand. The need for the work arose during Meridian Energy’s overhaul of the seven 105 MW generators at Manapouri power station on the South Island, New Zealand.

Furmanite technician sets up the milling head on the circular self-levelling milling machine
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When Alstom Power performed a survey of the existing stator frame on the second of the generators it was discovered that the support surface was not flat, and was more than 6 mm out of line. This would have made levelling the stator core difficult, with the need for shimming or placing packing under the core to correct any imbalance. Furmanite was called in on the basis of its high-tech equipment, to machine the surface flat.

The work was carried out using unique and highly sophisticated circular self-levelling milling (CSLM) technology, developed by Furmanite. It allows the machining of circular structures up to 24 m diameter, and is capable of achieving extremely high levels of accuracy to workshop tolerances and overall flatness, on-site.

The optimum machining plane is transferred to the datum ring via the clocking arm and, with the milling cutter then fitted, the electronically-controlled hydraulic self-levelling arm travels over the support ring surface supported by the central pivot, machining it flat. All the specified requirements were met, including achieving a flatness tolerance of 0.3 mm.

Manapouri power station is New Zealand’s largest hydro power station and is one of nine owned by Meridian Energy, New Zealand’s largest electricity generator, which generates some 33 per cent of the country’s electricity and manages some 70 per cent of New Zealand’s total hydro storage.

Manapouri, an underground power station carved out of solid rock between Lake Manapouri and the Deep Cove fjord on South Island’s west coast, generates up to 585 MW of electricity and maximises use of the natural landscape and environment to do so. It was built to contribute to supplying power to NZAM Aluminium Smelters.

Airtricity monitors wind energy production at farm in Ireland

Renewable energy firm Airtricity has chosen an ION enterprise energy management system from Power Measurement to monitor electricity production at its Corneen wind park in Ireland. Located on the Slieve Rushen Mountain in County Cavan, the site’s two 1.5 MW wind turbines produce

3 MW of clean electricity for the Irish electricity grid – enough power to serve approximately 2000 households.

To maximize the efficiency, reliability and power quality of this installation, Power Measurement’s regional representative, Premium Power, has equipped each turbine with one ION 7600 intelligent energy meter. The meters then report back to a PC workstation running Power Measurement’s ION Enterprise software at the Airtricity headquarters in Dublin.

The turbine supplies 1.5 MW to Ireland’s grid from the Slieve Rushen Mountain in County Cavan
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Reliable communications are also important because, like many wind farms, the remote location of the Corneen installation makes each site visit an expensive and time-consuming process. Fortunately the ION 7600 offers several flexible communications options that can accommodate remote monitoring and control in several ways, including modem over landline or satellite. To accommodate future upgrades, each meter can send status reports and alarms via e-mail over ethernet.

With its advanced power quality analysis, condition monitoring, and revenue-certified energy metering, the ION enterprise energy management system is a vital component of this innovative wind farm application, helping to maximize the potential of wind as a renewable source of clean, reliable electricity.

PowerLogic earns place on list

Schneider Electric has had its PowerLogic range of automatic power monitoring and metering equipment approved for inclusion on the Energy Technology list by the Carbon Trust.

Businesses that invest in products on the list benefit from 100 per cent capital allowances on their expenditure in the first year.

PowerLogic is the industry’s most comprehensive and sophisticated power management system, capable of meeting any metering or monitoring requirement.

It comprises a wide range of intelligent components such as the EGX web-serving ethernet gateway offering: basic energy management; the PowerServer automatic power monitoring system; various power meters and associated software. These can be integrated into an electrical distribution system enabling users to reduce downtime, cut energy costs and help maintain power quality.

Soft starters improve wind synchronisation

Fairford QFE soft starters are providing an effective, low cost and reliable solution for synchronizing the operation of wind turbines to distribution networks without harmful in-rush currents and mechanical damage, in several major wind farm projects in Costa Rica, Panama and Nicaragua.

Working in conjunction with Spanish partner, Descarrollos Eolicos, Fairford has supplied hundreds of its QFE soft starters, control cards and keypads for use in wind energy projects which are designed to reduce reliance of fossil fuels and achieve reductions in greenhouse gases.

In the largest of these projects, at Tejona in Costa Rica, studies reveal that the CO2 emission reduction will be 30 000 t a year. This will provide an economic benefit for the project with the sale of carbon credits.

The function of QFE soft starters in these projects is to bring the wind turbine generators on-line smoothly, achieving synchronization to the power network without massive in-rush currents on the supply and without the harsh shocks that can damage mechanical equipment such as bearings, couplings and gears.

QFE soft starters provide an effective, low cost solution for bringing wind turbine generators on-lilne smoothly
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The wind generator is driven to just below synchronous speed (around 93 per cent) under the action of its aerodynamic rotor. At this point the QFE soft starter unit – working in reverse mode – is used to put the generator on line. The soft starter ramps the generator voltage, and as the generator accelerates further to synchronous speed, a by-pass contactor is closed by the wind turbine controller once it has received a top of ramp signal from the soft starter unit.

When the by-pass connector is closed, the wind turbine’s power factor capacitors are connected and the turbine rotor then accelerates the generator up to a greater than synchronous speed, allowing generation to begin.

The QFE soft starter units that perform this operation are Fairford Electronics standard 690V range. They are designed to reduce the magnetic in-rush currents, which are an order of ten times rated line current. This current is held as an acceleration current during progression from 93 per cent to full synchronous speed and, finally, free-wheeling current. This is load current not drawn by the generator while it is at synchronous speed. It is handled by the QFE controller until the by-pass connector is switched in.

David Bennett, Fairford’s Managing Director said: “Our QFE units highlight both the flexibility and the reliability of our basic soft starter technology.”

High temperature video viewing system reduces boiler emissions

Lenox Instrument’s FireSight high-temperature remote viewing system offers an economical method of speeding light-off and thus reducing NOx emissions. It does this by permitting colour video monitoring combustion and process control in boilers, furnaces, kilns and incinerators.

FireSight’s high temperature remote viewing system permits colour video monitoring.
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Capable of operating trouble-free in temperatures up to 1927°C (air-cooled model) or 2204°C (water-cooled), the FireSight system is ideal for use in power plants, steel mills, paper mills, glass plants, cement kilns, and incinerators. FireSight systems are used to speed light-off, evaluate flame quality, determine status of igniters, and view flame impingement, NOx emissions and smoke.

In power generation applications, for example, using FireSight systems typically reduces fuel consumption by as much as two per cent and pollution by as much as 20 per cent.

The systems provide the highest image clarity in the power industry. The light volume control feature allows the operator to easily adjust the amount of light transmitted to the camera, eliminating the flaring common with other systems and ensuring a high-quality image from initial light off to maximum load.

The system also features quartz optics that withstands temperatures up to 649°C higher than the glass lenses used in other systems.

Furnace lenses can be supplied with a wide variety of directions and fields of view to match the specific application requirements. With its compact size, the entire system will normally fit into existing openings in boiler tubes and wall penetrations. The FireSight viewing system requires a boiler wall penetration of only 5-7/20 cm.

The system’s wall box provides a protective housing and mounting for the camera and also serves as the primary coolant shroud.

The FireSight’s compact CCD camera is an industrial surveillance camera designed for reliability and long life. The monitor is normally mounted in the control room providing the operator with a continuous, real-time image of the combustion chamber in operation

AE launches gasless power transformer

AE POWER has simultaneously developed SF6 gasless, 24 kV cubicle-type GIS
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Japan’s AE Power Systems Corporation is offering newly developed environment-friendly, SF6 gasless power transformers and switchgear. Because SF6 gas has a global warming potential far higher than CO2, any release into the atmosphere can have a significant impact.

The new transformers developed by AE Power utilize incombustible silicone fluid in lieu of SF6 gas. As silicone fluid is biodegradable in soil to silica and other natural substances, adoption of SF6 gasless transformers also contributes to reduction of waste matter.

The SF6 power transformers
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AE Power has simultaneously developed SF6 gasless, 24 kV cubicle-type gas-insulated switchgear (GIS). Using dry air as a substitute for SF6 gas, the new switchgear features the same external dimensions as the conventional cubicle-type GIS, which is in the same class, thus enabling easy replacement.

CAE wins power plant simulator contracts

CAE has recently secured five key US nuclear power plant simulator upgrade contracts worth more than C$3m ($2.1m).

The orders are from AmerenUE, Florida Power & Light Company, Duke Energy, Exelon, and Westinghouse Electric Company.

For AmerenUE, CAE will upgrade the Callaway Plant’s simulator steam generator models with CAE’s Rose. It will also re-platform the simulation computer and instructor station with PCs that run the latest operating environment. Work is to be completed early in 2005.

CAE has recently secured five key US nuclear power plant simulator upgrade contracts
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Florida Power & Light Co. has ordered a similar re-platform of its simulation computer and instructor station on the St. Lucie Nuclear Power Plant simulator. The St. Lucie simulator, originally delivered by CAE in 1987, services two Combustion Engineering PWR generating units at the St. Lucie site on Hutchinson Island in Florida. Work is to be completed by the end of 2004.

At Duke Energy’s McGuire nuclear station, CAE will upgrade by year-end the simulator’s electrical systems models, including its electrical grid, switchyard, AC electrical distribution system, main generator auxiliaries and emergency diesel generators.

For Exelon, owner of the largest nuclear power generation portfolio in the USA, CAE will develop reactor core and thermal-hydraulic models for the Three Mile Island simulator. The TMI-1, located in Pennsylvania, is a PWR unit that, at full power, produces sufficient electricity output to service some 200 000 homes. The project is to be completed in early 2005.

CAE will also assist Westinghouse Electric Co. with implementing its ovation digital computer system on the San Onofre Simulator for Southern California Edison. The plant systems affected by the new DCS are the feedwater and turbine systems.

Vibration monitor keeps rotating machinery equipment protected

Condition monitoring specialists, Sensonics has introduced the DN2601 dual channel, vibration alarm monitor.

Optimizing maintenance resources by helping to avoid costly mechanical breakdowns, the low cost DN2601 is particularly suitable where predictive maintenance practices are in operation and where continuously rotating equipment such as turbines, motors, pumps fans etc. are in constant use.

The compact DN2601 is provided with convenient DIN rail mounting and can be easily fitted in the minimum amount of space. Fitted locally direct to the machine or operated remotely, the DN2601 features a three-digit LCD display.

The DN2601 dual channel vibration monitor
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Protection to machinery is provided by a sophisticated dual level alarm system (two-channel) with both A1 (alert) and A2 (danger) levels incorporated. The alarms will automatically trip plant or alternatively provide protection via analogue outputs applied to SCADA, DCS or other monitoring control systems.

The DN2601 features dual vibration monitoring and provides accelerometer, velocity transducer or eddy current probe input options. It is compatible with most manufacturers transducers. A health check feature is included with all these alternatives.

Sensonics provides a range of DIN rail mounted units to monitor shaft vibration, temperature, thrust position, speed and reverse rotation, all of these products are designed to eliminate unexpected production stoppages or unnecessary maintenance activity and to ensure cost efficient production conditions.

Reliable power protection

Uninterruptible Power Supplies Ltd has launched its PowerWAVE T Series. It comprises single-phase UPS systems with power outputs from 7.5 to 20 kVA and three-phase systems from 7.5 kVA to 40 kVA to meet the requirements of mid-range server rooms.

The PowerWave T series is ideal as an alternative to multiple separate, smaller units distributed around a facility. Another important feature is outstanding backup time density. The series is fitted with integral batteries to offer up to 20 minutes autonomy on a small footprint – for example, only .45 m2 for a 40 kVA protection system.

It is based on third-generation, high-frequency, double-conversion voltage frequency independent technology. This offers the advantage of wide input voltage and frequency windows, delivering a high level of system security in applications where the mains is unstable, but without undue battery usage.

Uninterruptible Power Supplies Ltd adds to its PowerWave range of UPS
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Other PowerWave benefits still apply, such as double-conversion efficiency up to 95 per cent and 0.98 regulated input power factor for minimum running costs and single-phase input current total harmonic distortion less than ten per cent for cleaner mains. In fact, saving energy and with fewer hardware components, PowerWave T series is an environmentally friendly solution. In the design of the T Series, the focus has been simplification, together with optimization of critical components.

DHL chooses Emerson

Emerson Network Power, a player in the network infrastructure industry, has been chosen as a partner in the creation of the biggest DHL Data Switching Centre in Europe, based in Prague.

Liebert power quality solutions and Liebert Hiross high performance air conditioning (HPAC) solutions will guarantee maximum power protection and environmental control at the new data switching centre which will be operative in April 2004.

This new facility, that will enable DHL to reinforce its presence in Europe, further confirms Emerson Network Power’s reputation as a leading company in the networking infrastructure industry.

Liebert’s high performance air conditioning power protection unit
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Emerson Network Power is one of the few companies capable of designing and offering complete solutions covering both power quality and precision air conditioning. For this project, the biggest system of its kind ever realized in Europe, Emerson Network Power will supply a Liebert solution for a total 7.2 MW capacity. The project includes four systems, each with three Hipulse UPS 600 kVA modules, a 2000 kVA main static switch and maintenance bypass cabinet.

The power is distributed through Static Transfer Switch (STS) units or to dual input load. To synchronize the four systems, regardless of their power source (generators, batteries etc.), the biggest load bus synchronization system in Europe will be supplied. The challenging requirements of DHL for the air conditioning system are met by 63 Himod room-cooling units, six Matrix air-cooled chillers, four of which have an integrated free-cooling function.