Friday, October 27, 2006

Beacons purposely designed for control panels

A range of beacons are made in different sizes and are specially designed for the control panel or switch gear systems.

WERMA offers a range of beacons in different sizes specially designed for the control panel / switch gear programme. The beacon series 206-208 and 216-218 have a diameter of 57mm and a height ranging from 53 to 69mm. They are available in Permanent, LED or Flashing light versions.

The bulb in the permanent light beacon can be changed by simply removing the dome.

Connection is by means of 6.3mm spades.

Our small 231 installation beacon has a height when installed of 30mm and is 36mm in diameter.

These dimensions make it the ideal beacon for the control panel / switch gear programme.

An exceptionally high light intensity is achieved through the use of LED Chip-On-Board technology exclusive to WERMA.

Thanks to high quality workmanship and high protection rating IP65 the WERMA installation beacons remain unaffected by poor weather conditions.

All of the beacons are available in 24V, 115V and 230V versions.

One catalogue covers many electrical test tools

A combined Fluke and Robin Electrical Test Equipment catalogue gives electrical contractors and other professional users easy access to the a wide range of electrical test tools.

The new combined Fluke and Robin Electrical Test Equipment catalogue gives electrical contractors and other professional users easy access to the most extensive range of electrical test tools currently available. The 96-page catalogue provides a clear presentation of the wide range of installation testers, multimeters, clamp meters, portable appliance testers, environmental testing equipment and more from Robin and Fluke. Both market-leading brands are part of the Fluke Corporation.

New products from both Fluke and Robin - new products shown for the first time include economically priced combination kits from Fluke providing a set of tools that electrical installers and contractors need to use every day.

Also new are the Microtools cable testers to test wiring of voice, data and video networks that installers are increasingly being asked to handle in their everyday work.

New products from Robin include SocketMaster socket testers enabling fast testing of socket outlets to see if they are safe.

Catalogue includes valuable free BS Testing Guide Included within the new catalogue is a valuable free Guide to the 16th Edition Testing Regulations, Portable Appliance Testing, and important safety-related aspects in the selection and use of multimeters.

Industry-leading reputation for performance and dependability Fluke electrical test tools have gained an industry-leading reputation for nocompromise performance and dependability, with the ruggedness to handle the toughest tasks on a daily basis.

Robin products, particularly its 16th edition test instruments, have gained a well deserved reputation in the UK electrical contracting arena as a 'standard' for their quality, dependability and ease of use.

Thursday, October 26, 2006

Low-cost industrial Ethernet switches

Harting has introduced a new range of low-cost industrial Ethernet switches which combine low-profile mounting with ease of installation in IP30 industrial environments.

Harting has introduced a new range of low-cost industrial Ethernet switches which combine low-profile mounting with ease of installation in IP30 industrial environments. The new eCon2000 Series offer an unmanaged Ethernet switch configuration for use with 10 Mbit/s or 100 Mbit/s Ethernet networks conforming to the IEEE 802.3 standard, and feature automatic detection of the data-transmission rate. Devices are available with three, four or five RJ-45 ports, all featuring auto-negotiation, auto-polarity and auto-crossing and operating in the non-blocking store and forward switching mode.

The switches support simple and rapid network diagnostics with integrated LEDs at every port.

The robust aluminium housing measures only 46.5 (W) x 25.5 (H) x 105.4 (D) mm and lends itself to a 'flat' mounting configuration.

It is easily adapted for mounting onto a 'top hat' 35 mm mounting rail according to EN 60 715.

The eCon2000 Series operates from a 12-30 V DC pluggable power supply, and has an operating temperature range from -10 to +70C.

It meets all relevant IEC and DIN EN standards for electromagnetic compatibility, and is fully RoHS compliant.

Typical applications are inside cabinets in the industrial, transport and building automation sectors, particularly in networks with large populations of switches.

Latch on to a power saving relay

With its latching coil design this compact 30A rated relay requires only a short burst of drive power, thus saving battery power or drain on the PSU.

Matsushita Electric Works has recently introduced its new DQ power relay. Designed with power saving latching coils, the DQ now removes the limitation on applications such as battery backed timer switches of using relays with capacities of 10-15A, it is now possible to go to 30A. Most 30A power relays have rather high coil consumption, frequently over 1 watt.

With the use of latching coils the drive power need only be applied for a fraction of a second and then power can be removed saving either battery power or drain on the PSU.

The DQ is rated for 30A @ 250VAC, in a 1 Form A contact configuration.

The relay has been designed with a minimum insulation distance of 8mm and a surge withstand of 10Kv, and is available with a choice of either single or twin latching coil options.

The DQ relay measures 38x29x17.3mm (lxbxh), is PCB mounting but comes with .250 faston terminals for the power contacts.

Additional applications where the DQ relay may be appropriate include home automation controls such as electric water heaters, air conditioning units and remote control of electric power meters.

About Matsushita Electric Works UK (MEW UK) - founded in1981 as SDS-Relais, Matsushita Electric Works UK has over 35 employees with sales and technical support staff strategically located throughout the UK and Ireland.

With its local head office in Milton Keynes and branch office in Dublin as well as having associated companies throughout Europe, North America, Asia and Japan, Matsushita Electric Works is recognised as a global leader in electromechanical and solid-state relay technology.

At the beginning of the new millennium, MEWUK expanded its operations to include selected high technology products from the Lighting, Healthcare, Automotive and Automation divisions of its Japanese principal.

In Europe those products are promoted and sold principally under the NAiS brand name, but certain sensing devices use SUNX.

In other countries some products are sold using the brand names of Aromat, National or Panasonic.

Wednesday, October 25, 2006

Compact relay integrates with Bus systems

With its single latching coil design this compact relay is ideal for inclusion in applications such as timer switches, motor controls and integration into building installation Bus systems.

The new DJ relay from Matsushita Electric Works is intended to be an essential building block for Building Automation applications. The new relay is capable of controlling up to 16A at 250VAC with a maximum constant carry current of 20A. With its compact construction the DJ relay is ideal for inclusion in applications such as timer switches, motor controls and integration into Building Installation Bus Systems.

The DJ relay is controlled by means of a single latching coil that only consumes 250mW solely during actuation, after this point the relay can be de-energised and it will remain in the last set state.

This latching feature is ideal for control bus applications as power consumption can be kept to a minimum, reducing the supply demands.

The DJ relay is available in 2 contact configurations, 1 Form A and 1 Form C.

Both versions are available with a creepage and clearance distance of more than 8mm.

Tuesday, October 24, 2006

Small generators join bio-diesel range

With the growing need for environmentally sound power supply a generator's ability to run on 100% bio-diesel is proving a great success.

To compliment the recently released 250 to 500kVA Eco-Gen generators JS Power are pleased to now offer 10kVA to 20kVA units JS Power, a leading supplier of generators and UPS systems, has announced new sizes of their bio-diesel powered generators. Complimenting the current range of 25-500kVA models is the new 10-20kVA range of their popular Eco-Gen models. With the growing need for environmentally sound power supply the Eco-Gen range's ability to run on 100% bio-diesel is proving a great success for the UK based company, with great interest Worldwide.

'Having only just released the large generator range we are thrilled to be able to add the small units to our products,' said Jonathan Searby, company director.

'This new range will allow JS Power to offer an environmentally friendly generator to the whole spectrum of clients, from household to large companies.' The Eco-Gen range has been specifically developed to run on 100% bio-diesel, and is fully warrantied for this use, making them an ideal investment for the environmentally conscious client and are tailored to the needs of the application, from standby to prime power generation.

The Eco-Gen range is complimented by a range of Bio Diesel Processing systems.

JS Power work closely with the leading UK producer of processing equipment and are able to offer a complete package of a Eco-Gen generator and fuel processor.

* About JS Power - JS Power, an ISO 9000 accredited company, has been specialising in bio-diesel generators for the past 12 months and is based in the North East of England.

Alongside the Eco-Gen models they offer a full range of traditional diesel generators and a range of UPS systems.

Where have all my control panels gone?

Traditional control panels are large grey units taking up vast space in factories and other industrial sites, but they need no longer be so.

Traditional control panels are large grey units taking up vast space in factories and other industrial sites. How much better it would be if they were smaller, cheaper, modular and offered more features to the user such as flexibility, ease of operation and simple maintenance. Now, a truly innovative new busbar mounting system from Rockwell Automation complements and enhances the Allen-Bradley MCS range of components, allowing users to get maximum benefit from them.

The Allen-Bradley 141A represents a major leap forward in the design of plug-in mounting systems for starters and circuit breakers.

Traditionally, manufacturers of busbar systems do not make components and vice versa.

Now Rockwell Automation has drawn on its vast experience with Panel Builders, OEMs and end-users to make a complete system.

Along with all the other benefits, this makes for much easier type testing when compared to traditional bus bars where the manufacturer has no idea of what will eventually be installed.

Offering increased value for the user it brings the high levels of functionality more normally associated with the Petrochemical industry to 'everyday' manufacturing.

Starters that previously had to be mounted in separate isolated cubicles can now be packed tightly together.

The effect on the size of the overall panel is nothing less than dramatic.

Quick and easy to assemble, the 141A modules are simply plugged onto 60mm centre spaced busbars.

Suitable for horizontal or vertical mounting, there are no holes to be drilled or screwed connections to be made.

As well as direct-on-line, reversing and star-delta starters, the 141A system will accommodate Allen-Bradley SMC soft starters and PowerFlex AC Drives to provide maximum versatility for the panel builder and user.

Distribution and sub-distribution is provided using mccbs and/or mcb's.

The modules have the option of connecting to the control circuit with quick disconnect connectors.

These are normally top mounted to keep the control cabling separate from the motor cabling on the output side.

The result is a clean and EMC-favourable layout.

Systems with standard and ISO modules conform to the factory built assembly of Form 2b in accordance with IEC/EN 60439, i.e the busbar area is separate from the functional units and outgoing connections.

With the ISO modules, the busbars remain covered and safe-to-touch, even if the load feeders are removed.

When the 141A system is used with the Allen-Bradley140M and 140-CMN current limiting circuit breakers, no verification of short-circuit withstand is required.

All starter components are type tested according to BS/EN 60 947 providing a partially type-tested switchgear and controlgear assembly in compliance with BS/EN 60 439.

This means there is no expensive testing required for the panel builder and the customer is assured that their system complies with the latest European standards.

The 141A mounting system is also suitable for use with conventional or intelligent motor control panels.

With a devicenet network, the user has access to diagnostics and faultfinding information from the plant floor.

The interconnecting wiring within the panel is also significantly reduced, cutting installation time and saving space.

With the introduction of the Allen-Bradley 141A Mounting System, the user benefits from enhanced functionality, much smaller size, easier maintenance and lower cost.

Panel builders and OEMs enjoy reduced build costs and increased throughput.

These major benefits are set to make it the first choice for motor control solutions everywhere.

Monday, October 23, 2006

Connectors simplify power bus installations

A family of industrial connector products facilitate the installation of a 'pluggable' serial power bus for powering a number of devices such as motors.

HanPower T from Harting is a family of industrial connector products which facilitate the installation of a 'pluggable' serial power bus for powering a number of devices such as motors. The design of the new system allows the use of pre-assembled fully tested cables, guaranteeing fault-free wiring and minimising installation time. The HanPower T concept has been developed in response to the need to 'future-proof' new power distribution systems in industrial plants.

These systems have essentially the same requirements as data-transmission lines, in that one mechanically robust, well protected pluggable cable line has to supply several installed devices.

HanPower T components allow a 400V power bus to be implemented with 'T' functionality that makes it possible to efficiently connect power to several devices in series.

For currents of up to 16A, the system uses the proven Han Q5/0 inserts integrated into a plastics housing, with one connector for power in, one for power out and one 'T' connection for supply to the device.

For higher current requirements (up to 40 A) and greater mechanical protection, Han Q4/2 inserts are mounted in a zinc die-cast case.

An additional feature of these inserts is the provision of finger protection on the male contacts.

Custom pre-assembled, labelled and 100% tested cables for HanPower T can be built or purchased prior to installation, thus minimising assembly times and guaranteeing an error-free installed power distribution system.

Sunday, October 22, 2006

Check up on power supplies

A quick glance is all that's needed to confirm that power supplies are performing in line with requirements - more space savings, more reliability, and more options.

A quick glance is all that's needed to confirm that power supplies in the new S8VS range from Omron Electronics are performing in line with requirements - more space savings, more reliability, and more options. A standard, ultra compact power supply measuring as little as 40mm wide is complemented by a more advanced, yet identically sized, unit featuring an integral three-digit display which shows real-time output voltage or current. Invaluable during commissioning and fault-finding, these indications are a useful aid to performance monitoring during normal plant operation.

The display can also be set by the user to show the peak current which has been delivered by the power supply output and, depending on model, it can display either a maintenance forecast or the power supply's total operating time to date.

Supplied, as standard, with a five-year warranty, S8VS power supplies are available in 60-watt and 90-watt versions with 24V DC outputs.

All types are suitable for operation from AC inputs in the range 85V to 264V, 50/60Hz, and carry CE, UL and CSA approvals, making them ideal for use throughout the world.

The units are designed for direct mounting on standard DIN-rail, and feature space-saving, ultra-compact construction.

Power Factor Correction is built into the 90-watt version.

S8VS power supplies boast a long life expectancy, typically exceeding 10 years.

The optional maintenance forecast feature takes into account the aging of electrolytic capacitors, which is inevitable in any power supply.

By calculating the period of time for which the power supply has been used, and factoring in its operating temperature throughout this period, the forecast facility is able to provide advance warning of when this aging process is likely to reach the point where maintenance will be needed.

In addition to the visual indication on the display, 90-watt models with the maintenance forecast feature also offer an output signal which can be used to provide remote indication of the need for maintenance.

S8VS power supplies with the run-time indicator option show the accumulated operating time in thousands of hours.

This option is particularly suitable where the equipment powered by the supply needs regular maintenance, as the indicator reading can then be used as an aid to maintenance scheduling.

Ninety-watt supplies with run-time indication can generate an output signal when a particular operating time total, pre-set by the user, is reached.

Omron Electronics is a member of the Omron group of companies, which employs over 25,000 people worldwide, and has a turnover in excess of GBP 2.8 billion.

The company is an expert in the development and manufacture of a wide range of electronic products, including variable speed drives, programmable controllers, sensors and control components, all of which harness modern technology to deliver outstanding quality, value and performance.

Engine plant improves power factor correction

By having an efficient power factor, substantial savings are made, stresses are reduced and there are some financial savings achieved in power consumption through reduced transformer losses.

The Perkins Engines plant at Peterborough employs 3000 people and makes about 1000 engines and engine kits a day. The plant is a substantial user of high voltage supply and consumes about 8MW of electricity, distributed via seven substations within the Peterborough site. With a high inductive load, typical of a manufacturing facility of its type, power factor correction is a major consideration for the company.

The electricity company for the region, in keeping with most others in England, now imposes a reactive energy charge - reactive energy (sometimes referred to as 'useless' energy) is effectively the power used to energise the magnetic circuits in, for instance, AC motors.

By having an efficient power factor, substantial savings are made on the system, stresses are reduced throughout the system and there are some financial savings through reduced transformer losses.

While Perkins has always had power factor correction equipment, the requirement to improve that equipment had been identified.

The company therefore commissioned a survey of its substations and it was found that, typically, the power factor was 0.8.

It was clear there was high inductive load and scope for power factor improvement.

For example, the load through the transformers, once power factor correction equipment was fitted, dropped by an average of 20% with a significant reduction in stress on the system.

Perkins called in PFC Engineering Limited from the earliest stage, including the initial surveys.

Subsequently, PFC completed a more exhaustive survey of all seven substations.

During the surveys, PFC also considered the harmonics within the system; since otherwise, the indiscriminate deployment of power factor capacitors can create harmful amplification of harmonics on the system.

This, in turn, can lead to damaging resonance, which can affect the system and harm equipment connected to it.

It was important to understand all these factors in order to design a balanced system.

Perkins Engines, like just about every plant in Britain, has witnessed an increased use in inverters for variable speed AC motor drives.

This has significantly increased the harmonic content of the lines.

Some of the circuits at Perkins that power these inverters also feed the offices where there are computers and other equipment, so line cleaning (harmonic filtering) was essential.

PFC Engineering therefore fitted reactors to certain substations within the Perkins plant to cope with the harmonic distortion - the combination of the line reactor specification and the capacitor size is an important consideration.

One substation has a harmonic filter that removes 75 - 90% of the harmonic distortion, and others use partial filters to remove, say 40 - 50% of the harmonics while providing an effective power factor remedy.

There are a significant number of PFC Engineering's power factor correction panels installed in all seven substations in the Peterborough site and most of these enable a power factor of between 0.9 and 0.97 to be achieved.

The losses and the stresses on the system have been reduced dramatically and the Perkins plant runs more efficiently as a result.

Stuart Neal, Perkins' electrical engineer who has overseen the work points out that 'while industrial sites must believe they have effective power factor correction installed, many would be surprised at their true position if they properly surveyed their installations'.

Neal continued, 'we have been delighted and impressed with the way in which PFC Engineering approached our own requirement.

The survey was expertly conducted and the recommendations were technically sound and realistic.

The quality and effectiveness of PFC's products is excellent and the company's service has also been exemplary'.