ABB Installation Contactors

ABB Low Voltage Installation Contactors are designed according to international standards (IEC), European standards (EN) and French standards (NF CUTE, DIN-VDE, BS).

We consider 2 types of "Installation Contactors" for different applications : "Normal " Installation and "Day-Night" Installation. They are essentially used in automated building equipment, industry and offices for terminal circuit controlling less than 40 kW AC-1 (incandescent lamps, fluorescent lamps, convectors heating, batteries, regulation systems, ovens, drying systems), small motors controlling less than 15 kW AC-3 (ventilation, air conditioning, pumping, watering, automatic systems) and unbalasting systems in energy management (possibly enslavement from clocks, unballasting relays, telebreakers, thermostats).

Mounting

• Mounting on rail DIN 35 mm (EN 50022) for switchboard.
• Mounting depth: 58 mm
• Width included from 1 to 3 modules (1 module = 17.5 mm)
• The magnetic circuit design ensures a completely silent operation, the coil is supplied by AC (type ESB 20) or by an integrated diode rectifier (type ESB 24, ESB 40, ESB 63)
• Terminals are delivered in open position
• Protection against accidental direct touch
• Extensions 2, 3,or 4 poles depending on the ratings, without built-in auxiliary contacts

Accessories

• 2-pole auxiliary contacts for type ESB 24, ESB 40, ESB63 (addition of one 2-pole block type EH 04 .. for module).
• Sealing cover
• Distance piece

Flowmeters Monitor Waste Water

The Wells Sanitary District waste water treatment facility has installed four Optiflux electromagnetic flowmeters to monitor the flow of sludge at the treatment plant. The newly refurbished plant on the southern coast of Maine, USA treats up to 7.5 million litres of waste water per day. Engineering consultants redesigned many of the systems and processes at the facility and replaced all the existing electromagnetic flowmeters with Krohne's Optiflux instruments.

The Optiflux incorporates advanced measurement technology, which is highly accurate even when measuring substances with a high bubble or solid content or where there is turbulent flow. The flowmeters installed at Wells Sanitary District are being used to measure sludge recirculation and monitor the amount of effluent that is treated.

In the sludge recirculation area, which forms part of the of the facility's in-line waste activated sludge process, two Optiflux flowmeters are being used to measure the throughput of sludge, which is calculated per minute and per day. Another flowmeter is installed to measure the flow of sludge being removed from the system. The fourth Optiflux is used in the treated effluent area to measure the flow of treated water that flows through the facility.

Dennis Thayler, Superintendent at Wells Sanitary District, said: 'Many people don't realise that these meters operate 24/7, under demanding conditions, so they need to offer superior performance and reliability'. 'The use of accurate and reliable meters in this environment cannot be overstated'. 'Flowmeters are essential to the overall process here - and at any treatment facility, for that matter'.

The Wells Sanitary District now meets all safety standards required by the US environmental protection Agency (EPA) and Maine's Department of Environmental Protection. The Optiflux magmeter provides precise measurement across a wide and demanding range of applications. It can achieve an industry-leading accuracy of 0.15% and reproducibility of 0.06%, even when measuring materials with high solid content or that have turbulent flow.

Guide Helps Users Cut Compressed Air Costs

EnergAir has released a free guide to reducing costs in compressed air systems. Challenge Convention in Compressed Air details several ways to improve the energy efficiency of compressed air systems. Aimed at plant managers, site maintenance managers and energy managers the intention is to help address preconceived ideas about compressed air generation (one of the major energy costs to industry) that are currently the cause of huge amounts of energy waste, the alternatives can add literally tens of thousands on the bottom line.

'The industry needs to challenge convention on compressed air in order to realise the savings that can be made', according to Peter Tomlins of EnergAir UK. EnergAir believes that it can provide vital knowledge regarding the purchasing and integration of variable speed compressors, compressor sizing, balancing system pressure, providing visibility of actual energy consumption, and monitoring saving when changes are made, information that would not normally be available to individual plant and maintenance managers.

The brochure also contains real examples of how savings have been made by leading UK manufacturers such as Britvic and the equipment used to achieve those savings. The guide also aims to dispel some myths about how much difference new equipment can make without being properly integrated and offers advice on how to get the best from an existing compressor installation. The EnergAir guide to reducing the running costs of compressed air systems is available in paper format free from EnergAir and as a high-resolution pdf from the company website.

Bearings Cut Stress On Ship Structure

Bearings from Trelleborg Bakker improve FPSO manoeuvreability and safety. One of company's most complex projects was the supply of 42 specially designed bearings for the Sea Rose. Constructed of steel and rubber, these compensated for the flexing of the hull, lowering the stresses on the ship's structure.

As floating production storage offloading (FPSO) vessels travel further offshore to extract oil and gas, the demands on them become greater. They need to house more large pieces of machinery such as compressors and pumps. Weighing considerable amounts, these can create significant stresses on the vessel, affecting manoeuvreability and safety.

This effect is intensified by the potential severe weather conditions of deeper waters, with increased forces from waves and wind. Another complication is that the tonnage of the ship constantly changes as oil is pumped in and then offloaded to tankers. Trelleborg Bakker, an operating unit of Trelleborg Engineered Systems, has worked with leading FPSO fabricators and operators since the inception of these floating rigs.

Machinery fitted to FPSOs is commonly installed on Trelleborg Bakker bearings. These, constructed of steel and rubber, compensate for the flexing of the hull, lowering the stresses on the ship's structure. One of Trelleborg Bakker's most complex projects was the fitment of the Sea Rose. This required the installation of 42 bearings in three special designs. Each of them over 2m high and the heaviest weighing close to 10 tons, they can withstand exceptional load vertically up to 10,000kN and horizontally up to 3500kN. They are also capable of compensating for distortions up to 75mm. The Trelleborg Bakker bearings fitted on the Sea Rose are proving successful in her assignment extracting oil off the coast of Newfoundland in Canada. Technology developed for this project and others globally, allows Trelleborg Bakker to offer cost-effective bearing solutions for frames a secondO vessels worldwide.

Addon Expands Servo Controller I/O

QuickSilver Controls has developed a simple 24V breakout that can be attached directly to the SMI port of a SilverDust MG, IG, IGF, IGC or IG8 servomotor controller, providing access to power, communications (RS232/485) and I/O. The breakout also converts the controller's TTL level I/O to five 24V isolated inputs and two 24V open collector outputs.

With a list price of US $75, this breakout is an easy way of adding extra 24V I/O to a SilverDust controller.

Connector Offers Performance/Price Compromise

Hansford Sensors has selected an alternative 12mm connector style, the M12, as offering the best combination of performance and price. The result - today, you can specify either the standard MS series or the M12 Connector on most of their range of vibration sensors. The main advantages of the M12 connector are its smaller size and the fact that its associated cable assemblies have a tighter bend radius.

It is a well accepted and proven connector used across many industries including process control, automation and sensing. They are particularly suitable for use in vibration monitoring equipment, the IP67/68 sealing making them usable in difficult environmental conditions often found in maintenance condition monitoring applications. With its wide use in industrial electronic equipment, the cost-effective connectors and numerous cable assemblies are readily available from electrical distributors worldwide making off the shelf delivery a reality.

Hansford Sensors has applied the connectors across the HS-100, HS-100S, HS-420 and HS-421 series of vibration sensors. All models are constructed in robust welded stainless steel and offer either top or side entry for the electrical connection. The M12 mating connector is available in both a straight or right-angle version. The HS-100 sensors are industrial accelerometers offering a 100mV/g AC output with a top entry connection, whilst the HS-100S is a low profile unit with a side entry connection.

The HS-420 is a PLC accelorometer with integral circuitry providing a 4-20mA output proportional to the velocity level. The HS-421 model offers a dual output of 4-20mA for velocity and AC g suited for the many commercially available data collectors. For those needing to measure both vibration and temperature levels at the same monitoring point, Hansford Sensors has also introduced dual-output versions of the HS-100T (100mV/g output) and the HS-420T (4-20mA output) sensor models, both fitted with M12 connectors as standard.

Gearbox Range Extended

Following last year's distribution agreement with Chiaravalli Trasmissioni, Transdev is now able to offer form-fit equivalents of Motorvario and Bonfiglioli worm gearboxes and geared motors at competitive prices. The CHM (Motorvario) and CHB (Bonfiglioli) series provide industry standard interchangeability covering a comprehensive range of aluminium and cast iron CNC machined housings with RAL 9022 powder coated epoxy protective finish.

With power ratings from 90W to 7.5kW, they are available in a wide choice of foot, flange and face mounting options with selectable motor position, single or double shafts, connection flanges for multiple mounting and a range of accessories including pre-stage gear reducers and torque arms.

The CHM range covers nine models with ratios from 7.5:1 to 100:1 and single or double solid input shafts on 25 to 130mm centre distances.

Nominal torque ratings are up to 14nm for the smallest frame model unit and are up to 650nm for the largest.

The CHB range covers four models with ratios from 7:1 to 100:1 with centre distances from 30 to 62.17mm with torque ratings to 110nm.

The modular design of both CHM and CHB versions includes standard B5 and B14 flanges with mounting surfaces on all faces allowing a wide choice of flange and foot mounting positions.

Specifications, installation and operational instructions are detailed in separate catalogues, available in hard copy or as a PDF on Transdev's website.

For use with the gearboxes, Transdev also supply a range of four-pole, three-phase motors with continuous service ratings to IEC 34-1, closed design IP55 housings and Eff2 efficiency levels.

With both B5 and B14 flanges and IEC power ratings to 7.5kW, accessories include forced ventilation kits.

Two-pole and six-pole windings and higher efficiency versions are also available.