Company News

E Preston Electrical Expands Franchises and Goes Online

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E. Preston (Electrical) Ltd was established in 1980 as a specialist distributor of switches and electrical components.  Beginning with only 3 franchises the company currently has over 40 different franchises and holds approximately half a million pounds worth of stock.

Component Photo

Now in the third generation of family ownership E Preston Electrical continues to grow and build on traditional values.

“We work hard for our customers to get the best products at the best prices while providing exceptional customer service.  We always do what we say we will, even if that is just a call back,” says Mark Preston, MD.

This is a principle that was rooted in the business from its inception over 30 years ago by founder, and grandfather to the current directors, Ernest Preston.

Although there is still a great emphasis on these traditional values the company has embraced new technology in all of its business operations and now launches a new digital venture.  The new interactive e-shop eprestononline.co.uk is aimed at increasing accessibility to existing and new customers.

“We have access to the latest technology from our suppliers,” says Matthew Preston, sales director. “We want to make dealing with E Preston as easy as possible.  We will continue to visit new and existing customers, and speak to them on the telephone, but with eprestononline we can offer them access to our company whenever they want.”

Click AwayThe new eShop will allow customers to log in to their own portal to view orders, print off documents such as acknowledgements and invoices, and allows them to place repeat orders.  Data sheets and supplier catalogues will also be readily available.

The company believes it maintains its position as a traditional company – or more appropriately, a modern company with traditional values.

 

Enquiry Form: http://www.epreston.co.uk/contact/

Home Page: http://www.epreston.co.uk/epblog/

Schurter PSUP 24 VDC Universal Switching Power Supply

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* Constant voltage switching power supply
* Can be used worldwide (Universal AC)
* Protection class II (no Frequency Generator)
* Time-saving installation

Schurter accessorizes its illuminated Metal Line switches with the PSUP 24 VDC universal switching power supply. The Class II power supply supports SCHURTER’s full range of point and ring illuminated Metal Line switches rated for 24 VDC supply  voltage.  The PSUP is also suited for a wide variety of indoor lighting applications such as LED.

The new Schurter switching power supply unit processes DC (127 – 370 VDC) or AC (90 – 264 VAC, 47 – 63 Hz) from the input side. A constant 24 VDC, with a power of 8 W, is then available at the output.

The housing of the PSUP is completely insulated and is rated IP42 for indoor use. The operating temperatures may vary between -30 °C and +70 °C. The particularly compact housing dimensions, along with the double-sided mounting lugs and wire leads, provide for extremely simplified assembly.

The Schurter PSUP 24 VDC is protected against short circuit, overload and overvoltage.  The power supply is UL 8750, CSA CS22.2 no. 250.0 approved. It complies with EN 60950-1, EN 61347-1, EN 61347-2-13, as well as EMC emission standards EN 55022, EN61000-3-2 and EN 61000-3-3.

The new switching power supply unit was initially intended to support Schhurter’s Metal Line illuminated switches. Thanks to its versatility, however, it is suitable for supplying power to a wide range of indoor applications.

Application
– Complete power solution for 24 VDC illuminated Metal Line switches
– Indoor LED lighting
– LED decorative lighting and LED displays
– LED office lighting
– LED signage illumination
– Line voltage for residential applications 120/240 VAC in North America

 

Enquiry Form: http://www.epreston.co.uk/contact/

Home Page: http://www.epreston.co.uk/epblog/

Schurter FPBB RAIL, Compact DIN-Rail Filter

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● Ultra-slim book style design for DIN-Rail mounting
● Version for backplane chassis mounting
● Double-stage, single-phase filter for highest EMI attenuation
● Cage clamp terminals for quick and efficient wiring
● Variants with overcurrent and overvoltage protection

Schurter’s new FPBB RAIL is an extraordinarily slim double-stage, single-phase filter, measuring only 25 mm in width. The attractive space-saving design integrates an optional fuseholder or circuit breaker. Additionally, an overvoltage varistor is available in all three variations. FPBB RAIL: three functions in one ultra-slim housing.

Space can be a scarce commodity on a panel, particularly panel designs in control cabinets for industrial machinery. Densely populated interference generating components, such as switching power supplies or inverters, can further complicate design when high performance filters are required to reach CE conformity. These filters can be large and can occupy premium space on the DIN-Rail. SCHURTER provides a solution with the FPBB RAIL. The new two-stage filter offers a very high EMI attenutation in an ultra-slim, space-saving housing.

Typical areas of application for the FPBB RAIL are industrial or machine controls, where downsizing and possible relocation of the control cabinet to a more accessible area can be realized. A backplane screw mount version is also available for further flexibility in design. The powerful, slim filters are also ideal for medical equipment according to IEC / UL 60601-1 and ICT equipment according to IEC / UL 60950, offering low leakage or standard current options. Further features include cage clamp terminals for particularly efficient, fast wiring.

The FPBB RAIL is designed for currents from 1 A to 16 A with a maximum of 125 / 250 VAC and 250 VDC according to IEC and UL / CSA standards. The series is ENEC and cURus approved. The filter version can be used over a wide temperature range from -40 °C to 100 °C. Versions with fuseholder and overvoltage protection operate over a range of -40 °C to 85 °C, while those with a circuit breaker are rated for a range of -5 °C to 60 °C.

Technical Data / Approvals
– single-phase DIN rail filter 250 VAC / 250 VDC
– double-stage filter with very high attenuation
– filter available in standard or medical M5 / M80 versions
– rated currents: 1, 3, 6, 10, 12, 16 A (ENEC / UL / CSA) at 40 °C
– operating temperature: -40 °C to 100 °C
– DIN rail mounting or backplane chassis mounting
– cage clamp terminals 0.2 – 2.5 mm2, 24 – 12 AWG

Application
– Industrial controls
– Industrial applications
– Datacom equipment
– Medical equipment
– Controls in door jambs, e.g. elevators

 

Enquiry Form: http://www.epreston.co.uk/contact/

Home Page: http://www.epreston.co.uk/epblog/

Bulgin Offers Application-Focused Approach to Connectivity and Switching

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Bulgin is helping its customers to select the right connectors and switches for their applications with the launch of an Industry Applications brochure. Covering the entire Bulgin portfolio – including its broad range of Arcolectric switches – this newly created brochure provides a brief overview of the product lines best suited to each application.

The brochure is divided into industry-specific sections – industrial, marine, transport and infrastructure, automotive, medical, oil and gas, data and telecoms, agriculture, renewable energy, recreation and leisure, and appliances – demonstrating the diverse range of settings where you might find Bulgin products. A simple visual guide and ‘at a glance’ descriptions highlight the key features and available options for each product, making it quick and easy to find what you need. From circular power and data connectors to fuse holders and switches – as well as specialist fittings, such as ROV tether connectors and ATEX rated products – you can rely on Bulgin’s environmental protection expertise and many years of industry experience to provide the right solution for your application.

To download a copy of the brochure,
click here —–>   Applications Brochure

 

Enquiry Form: http://www.epreston.co.uk/contact/

Home Page: http://www.epreston.co.uk/epblog/

Schurter – Protection Against Thermal Runaway

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A thermal runaway is an increasing threat to electronic devices where more and more power is packed in ever smaller spaces; it is a threat that is poorly dealt with using traditional means.

The causes of a thermal runaway are varied and often random in nature. However, the ever-higher power density in electronic wiring and the trend towards miniaturization are without a doubt of particular importance.

More and more functions are packed in compact modules, which then also have a correspondingly high power consumption. Even slightly excessive currents in power electronics with only a little power loss lead to elevated temperatures of approximately 200 °C. The possible consequences: damage or disconnection of surrounding components, damage to the printed circuit board structure or, in the worst case, the triggering of a fire.

Click Link Below for Application Notes:

Protection Against Thermal Runnaway

 

Enquiry Form: http://www.epreston.co.uk/contact/

Home Page: http://www.epreston.co.uk/epblog/

 

 

Bulgin’s Popular Buccaneer Range is an Excellent Example of IP66, IP67, IP68 and IP69K Rated Environmentally Sealed Circular Connectors.

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There is a growing demand for power, signal and data to be made available just about everywhere we look – even in the most extreme types of environments. This means that the cables providing connectivity to these technological components have to work reliably under tough conditions – on automated factory floors, inside heavy machinery, exposed to outdoor elements or even underwater. One of the most common points for potential damage in any electrical system is any place where these cables get plugged in – the connectors.

So what’s the difference between a normal connector and a harsh connector?

Harsh connectors are expertly designed for extreme environments where technology is being pushed to new frontiers.

Some of the main elements that rugged electrical connectors will protect against include:

Water – this includes rain, water vapour, and possible water submersion.
Dust – industrial and outdoor environments often contain a lot of dust or dirt, which can be harmful to electrical systems.
Extreme temperatures – very low or high temperatures can be detrimental to technology.
• Explosive environments – ATEX zones are work areas that could be potentially explosive because of the presence of dangerous substances in the form of combustible dust, gas, vapour or mist.
Rough handling – some connectors need to be mated and unmated multiple times in a day, often hurriedly, which increases the risk of wear and tear on the connector. Connectors being dropped or dragged along hard surfaces can also cause damage to the components inside the connector and affect the integrity of power, signal or data connections being passed through the cable.
Pressure – power, data and fibre optics are needed in aircraft, in space and even at the bottom of the ocean, where pressures can reach up to 9,000 pounds per square inch.
Salinity – the high salt content of water and air in coastal and marine environments can cause corrosion and calcareous growth. The correct material selection is therefore vital to ensure the maximum lifecycle of technology components used in coastal and marine environments.

Key features of a harsh environment connector:
IP rating – depending on the application, harsh connectors should have Ingress Protection (IP) Ratings of IP67 (protection from dust and immersion between 15cm – 1m), IP68 (protection from dust and long-term immersion up to a specified depth) or IP69K (protection from dust, close-range high pressure and high temperature spray downs). IP69K is ideal for applications in the food processing and medical industries, where equipment must be regularly sanitised.
Locking/coupling mechanisms – a robust coupling mechanism is a must for harsh connectors. There are many different types of connector couplings, including ring, twist locking, threaded, bayonet, push-pull and quick disconnect couplings, all with different attributes for various types of applications.
Housing and insulation – the type of material the connector is made of is an equally important consideration. For applications where the connector is likely to be exposed to extremes of temperature and plenty of moisture and dust, a corrosion-resistant metal housing may be the most appropriate option. For other uses requiring lightweight and flexible connectors, high-temperature resistant plastic composites may be more attractive. Overmoulded cable versions are also sometimes available as an option where it is not a requirement for the unit to be re-terminated.
Seals & grommets – rubbery seals can be used inside the coupling for keeping the connection tightly in place and watertight.

The shape of the connector, thread pattern or mating mechanism and positioning of pins also play an important role in the creation of a truly rugged and reliable connector. Circular connectors allow for better ease of engagement and disengagement as well as capacity for a wider variety of contacts and voltages. Circular connectors are also easier to seal and less likely to wear or break, and an intelligent ‘scoop proof’ design can avoid damage to the pins if the connector is mis-mated.

Bulgin’s popular Buccaneer range is an excellent example of IP66, IP67, IP68 and IP69K rated environmentally sealed circular connectors. These secure, rugged and highly reliable connectors can be used in harsh or hostile environments and offer a wide choice of options from 2 to 32 poles with screw, solder or crimp terminations as well as USB, SMB & RJ45 options for data to solve any type of design requirement.

 

Enquiry Form: http://www.epreston.co.uk/contact/

Home Page: http://www.epreston.co.uk/epblog/

Hylec IP66 DN Enclosures Range

Hylec’S IP66 DN Enclosures range is a very flexible solution for the vast number of applications needing protection against water ingress that also house components requiring either visual checking or frequent access. They will withstand repeated opening and closing with no loss of sealing integrity. A 35mm DIN rail and mounting screws for simpler mounting of terminal blocks, relays and connectors is included, and the DN range also carries multiple slots for vertical PCB mounting, making this product an excellent and flexible choice for both electrical and electronic applications. Manufactured from flame-retardant ABS, its exceptional robustness also extends to meet the IK08 impact standard.

 

Enquiry Form: http://www.epreston.co.uk/contact/

Home Page: http://www.epreston.co.uk/epblog/

Schurter Type DD14 Power Entry Module with Double-Stage Filter

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* Ultra-compact design
* Suitable for very high EMI disturbances
* Various mounting options
* V-Lock cord retaining option
* Fuseholder meets latest IEC standard

Today’s electronic equipment is designed to deliver high performance in a compact size. Often this causes problems affecting the equipment itself or other nearby devices due to the inherent electro-magnetic interferences being generated in and between the different systems. To meet these EMC challenges, high performance power entry modules must also keep pace, and such is the case with the new DD14 series from SCHURTER. The DD14 series packs remarkable functionality into a new generation of compact power entry modules.

The new DD14 combines an IEC C14 appliance inlet with 2-pole switch and 2-pole fuseholder. EMC performance is further enhanced with a depth-saving 2-stage filter. Shielding is optimized by screwing the metal casing of the filter to the panel, using its horizontal or vertical flange. A snap-in filter version eliminates the flange, consuming even less panel space.

The DD14 integrates the EMC filter directly in line with the power input. The two-stage filter design suppresses interference voltages more effectively over a much broader frequency spectrum than single-stage filters, thereby having a positive effect on electro-magnetic compatibility. Standard and low-leakage medical filter options are available for use in commercial or facilities ICT equipment according to IEC 60950 and medical equipment according to IEC 60601-1. The series meets the new fuseholder requirements outlined in IEC 60127-6 for enhanced fire safety and is also suitable for use in home appliances according to IEC 60335-1. It is compatible with V-Lock retaining cordsets.

The DD14 is rated for current levels up to 10 A / 250 VAC according to IEC and 8 A 125/250 VAC according to UL / CSA. It is ENEC and cURus approved.

 

Enquiry Form: http://www.epreston.co.uk/contact/

Home Page: http://www.epreston.co.uk/epblog/

Schurter RTS – Reflowable Thermal Switch

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• Prevents power semiconductors from thermal runaway
• Supports up to 60 VDC applications
• Reflow solderable at 260 °C
• Customer-specific version with shunt or overcurrent fuse
• Smallest dimensions

Schurter introduces its new RTS. The RTS is a particularly compact overtemperature protection device using advanced SMD technology. It is suited for the highest demands of protection in power semiconductors.

RTS stands for “Reflowable Thermal Switch”. It was developed to protect highly integrated power semiconductors like MOSFETs, ICs, IGBTs, Triacs, SCRs, etc. from overheating. Before mechanical activation, the RTS can be mounted using conventional reflow soldering techniques with temperature profiles up to 260 °C.

Mechanical Activation
After having the RTS reflow soldered on a PCB, mechanical activation arms the RTS for tripping at 210 °C. This activation can be done manually or by fully automated means. In contrast to electrical activation, the RTS activation status is clearly and immediately visible to the installer. Furthermore, the third additional contact required for electrical activation is thereby eliminated.

Compact Dimensions, High Load Capacity
The new type of overtemperature protection shines with the smallest dimensions and highest load capacity. Operating currents up to 100 A at rated voltages of up to 60 VDC can be handled by the RTS, which is just 6.6 x 8.8 mm in size. Customer-specific variants are available with an integrated shunt or an additional overcurrent fuse. These further integrated functions are resulting in less space consumed on the printed circuit board. The Reflowable Thermal Switch meets the high reliability requirements of AEC-Q200 and MIL-STD.

Protection Against Thermal Runaway
Thermal runaway refers to the overheating of a power semiconductor due to a self-reinforcing, heat-producing process. The reasons for this are the ever increasing power density and the trend towards miniaturization of electronic circuits.

RTS protects power semiconductors not through a logic circuit but rather through basic laws of physics. In case of a thermal runaway, the RTS reliably interrupts the circuit precisely at the well-defined temperature.

Technical Data
• Rated Voltage 60 VDC
• Tripping temperature 210 °C
• Operating current up to 100 A

 

Enquiry Form: http://www.epreston.co.uk/contact/

Home Page: http://www.epreston.co.uk/epblog/

Hylec’s Comprehensive Range of PCB Terminal Blocks, PCB Fuse Holders & PCB DIN Rail Supports

Hylec’s comprehensive range of PCB terminal blocks is suitable for virtually every application.

Enabling secure transmission of signals, data and power to PCBs, Hylec’s wide range of terminal blocks feature a space-saving connection method ideal for multiple OEM applications in consumer, processing and industrial applications. In virtually every type and style, as well as standard though-hole mounting and wire protected designs, there are plug & socket (right-angled and vertical), board-to-board (pluggable) and screwless, push-wire terminal blocks, plus rising clamp PCB terminal blocks in single, double and triple-decker styles which save valuable board space.

Manufacturers can also find a comprehensive range of PCB fuse holders and PCB DIN rail supports at Hylec. The PCB fuse holders and cover are available in green and black, on industry-standard 22.6mm pitch. Compact and UL- and VDE-approved, they are available at very competitive prices. As a result of the structure and design of the tool, Hylec DIN rail mounting PCB supports offer a superior degree of rigidity compared to most others available on the market, and are available in a greater range of sizes.

 

Enquiry Form: http://www.epreston.co.uk/contact/

Home Page: http://www.epreston.co.uk/epblog/

Contact E Preston Electrical

tel: +44(0) 161 339 5177

email: sales@epreston.co.uk

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