ABB launches the Polytransformer

The Polytransformer is ABB’s new multifunctional substation power transformer
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ABB has launched a multi-functional substation power transformer with multiple ratings for high, low and tertiary voltages.

ABB’s Polytransformer is a compact and multi-functional shell form power transformer and enables customers to use a single transformer for a variety of ratings and as a solution to a broad spectrum of requirements.

The Polytransformer can be moved from one substation to another according to need – in an emergency if a power transformer fails, to boost supply during peak periods, as a temporary replacement for unreliable equipment, and as a source of income for renting or leasing to other companies.

Designed with internal taps the Polytransformer can be connected to a variety of ratings – for instance, 400 kV to 230 kV, 400 kV to 138 kV, 400 kV to 115 kV, 230 kV to 138 kV, 230 kV to 115 kV, and with 33 kV, 26.4 kV and 24 kV in the tertiary system. The voltage rating is selected by changing connections internally prior to moving the transformer to a new location. An on load tap changer (OLTC) for voltage regulation is included.

The 450 MVA Polytransformer (front) with its 400/230 kV connection, in parallel with the twin transformer (back) of a failed unit. Each Polytransformer is customized by ABB to make it electrically and dimensionally compatible with the customer’s transformer fleet and to ensure that it will fit with the maximum number of installed units. The compact design facilitates easy transport between substations.

Four twin units of 450 MVA have already been delivered to a utility customer in Spain. Two of them are generating income, having been leased to another utility. One of the leased Polytransformers is providing additional capacity in a substation during load peaks, the other is a temporary replacement for a power transformer that experienced a catastrophic failure.

Non-stick handling solution

Matrox: top performance under various moisture conditions, even when using one of the most cohesive grades of coal
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Röchling Engineered Plastics has introduced a new lining material for bulk material handling. The Polystone Matrox exhibits extremely low surface friction to promote the flow of materials in trucks, chutes, bins and hoppers.

Röchling claims that Matrox will outperform stainless steel and other UHMW products when handling cohesive bulk materials and still provide a very acceptable life because of the product’s excellent abrasion resistant properties. It has the lowest coefficient of friction when compared with other UHMW products. This new product combines low friction, abrasion resistance, UV resistance, heat stabilization and weldability into one product and is available in a variety of sheet sizes to maximize yield and minimize seams and fasteners.

Speak easy control in power plant

The Simatic S7-400 computers are up to three times faster than earlier models
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A new telephone communication system has been developed by Siemens for control centres in power stations.

The wire bound intercom system has a decentralized structure, which coupled with the fact that its connections are designed with a backup system, ensures that the person that needs to be reached, can be reached.

Microphones, loudspeakers and call stations are all connected to each other via a digital crossbar that is aided by a digital sound processor supported computer system. The control and logical linking tasks are performed by the Simatic S7-400 automation system, a method that integrates with the existing technical infrastructure.

The central call stations consist of a touch panel, which acts as an operator control and visualization terminal. For confidential communication a normal hand held telephone is used. Connections between call stations are established in full duplex mode, enabling two way operation as well as group and conference calls. The system is pre configured for 40 inputs and outputs although a maximum of 128 can be used.

The Simatic components, which are fitted with an emergency power supply, are mounted on the rear wall of the central cabinet in six tiers.

Delta defence adds four

A crash test vehicle puts a defence barrier under the spotlight
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Delta Scientific, the manufacturer of counter-terrorist vehicle control systems has announced that another four US nuclear power plants are to install its barricade devices, which are used to stop and destroy errant vehicles. Over 85 per cent of US nuclear power plants are now protected by Delta vehicle barricade systems.

The protection models can halt nine tonne vehicles that are travelling at speeds of up to 70 miles per hour.

The TT207S, a 274 cm moving wedge that can be lowered to allow passage of authorized vehicles, is able to deny access to a truck being driven at high speed. Crash Rated by the US Department of State at K12/L3 guarantees that any vehicle travelling at 50 mph and weighing almost seven tonnes will result in less than a one metre penetration of the barrier upon impact.

The system is to be installed at the Palisades Nuclear Power Plant in Michegan, San Onofre in Southern California, St. Lucie in Florida and Pilgrim in Massachusetts.

Emerson expands Fisher NotchFlo

The bodies are available in a variety of finishes as well as NACE materials for corrosive applications
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Emerson Process Management has extended the product line for the Fisher NotchFlo DST control valve by adding 1”, 2”, 3” and 4” Class 600 globe style bodies. The enhanced range is available in carbon steel, chrome moly and stainless steel and also NACE materials are available for corrosive applications.

The NotchFlo DST control valve minimizes the cavitation and clearance flow problems typical to high pressure liquid applications within the power generation industry.

The trim features a longitudinal flow path that incorporates a series of pressure staging notches. The notches achieve the required pressure drop while avoiding conditions that would cause cavitation and result in trim damage.

The pressure staging design and separation of shut off and throttling locations, prevent high pressure drops from occurring at the trim seat under low flow conditions avoiding clearance flow erosion of the trim seat and thereby extending the shut off capability.

The relatively large flow passageway through the control valve trim allows control of liquids carrying entrained solids.

The NotchFlo DST control valve trim is pressure balanced, which is designed to yield a smoother operation while reducing the actuator size requirements.

The valve plug features a large-diameter stem and added rigidity against high-pressure conditions.

Epoxy takes 500°F

Master Bond’s EP121AO copes with the high degree of heat dissipation from active power components
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A new low viscosity thermal conductive, electrically insolative two component epoxy compound for potting, casting, encapsulation and sealing has been developed by Master Bond.

The EP121AO epoxy resin compound is a made up of a heat resistant liquid and a curing agent that encourages thermal stability. It is effective for temperatures up to 500˚F.

Sweet partnership

Honeywell has just released Asset Manager 310, the first to have been developed in conjunction with its sister programme PKS Advantage.

Developed with PKS Advantage, Asset Manager automatically builds a database with relevant device, fault logic and remedial information. Honeywell aimed to create a programme with focussed troubleshooting and performance assessment capabilities to minimize downtime.

Integrated with Experion PKS, the new version provides a common interface for asset management and process control, providing a flexible infrastructure to manage and open data from multiple OPC data sources.

Asset Manager connects people across the supply chain to improve operational effectiveness and reduce maintenance costs.

Ad-Vantage Aveva

The global EPC company, CB&I, has signed a global licensing agreement to use the engineering IT system, Vantage Project Resource Management (VPRM).

CB&I were searching for a scaleable, corporate business management solution that would support its global project environment across multiple business operations as well as integrate with its existing ERP and engineering solutions.

Aveva will supply its VPRM while also providing a direct interface between the materials management system and CB&I’s existing 3D engineering solutions, Aveva’s PDMS and Intergraph’s PDS.

Robotic inspection

Praxair Services has purchased the assets and technology of InTank, a robotic inspection service for above ground storage tanks.

Adding to its existing portfolio of in-service leak detection and corrosion control services, Praxair will now be able to offer inspection services that utilize a mechanical robot, which is able to determine the integrity of a storage tank without the costly downtime and release of harmful emissions usually associated with taking a tank out of service.

Alliance eyes Avon engines

Dallas Airmotive and Siemens have successfully completed the maintenance, repair and overhaul of a Rolls-Royce Avon industrial gas turbine, using a test cell.

The alliance between the two companies offers reduced life cycle operating costs for industrial Avon users along with total train solutions for driven equipment.

DayStar development

DayStar Technologies has developed a thin film copper indium gallium selenide solar cell, more commonly known as a CIGS cell, for the conversion of sunlight into electricity.

The company is also working on a high volume manufacturing process that could significantly reduce the cost of solar cell production and thereby the cost of solar electricity in general. The process is designed to use raw materials that do not suffer from the same supply constraints as silicon and use volume manufacturing equipment already proven in other fields, such as the magnetic disc drive industry.

Power quality tool

Power Measurement has added an option to its ION EEM energy management software in the form of a power quality module, the ION EEM PQ module. Aimed at providing the tools to help large businesses analyze their power quality quickly and efficiently, the module can automatically classify power quality events, instantly analysing multiple events and helping to group or link them to a single root cause.

The PQ module is suitable for electric utilities as well as large commercial or industrial facilities. It helps to pinpoint threats to power quality and reliability and can increase productivity by reducing the time required to analyze multiple events.