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/

Shurter 4710-5 Series, 16 A IEC Appliance Outlet Type J for Intelligent PDUs and UPSs

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* Integrated light pipes for status indication
* IDC terminals for quick assembly
* V-Lock cord retention
* Color coding for easy identification in multiphase systems

With the appliance outlets of the 4710-5 series, SCHURTER launches the logical evolutionary step to the successful 4710 – with a clear plus in functionality for status indication.

The new 16 A appliance outlet series 4710-5 offers precisely fitted, integrated guides for light pipes. Up to four light pipes can be used to channel LED light from the circuit board. The feature provides a space and cost saving approach to status indication in PDUs, which are used to signal the equipment technician regarding system status. The operation of the LEDs is freely configurable. To ensure proper application, the light pipes must be ordered as an accessory and should only be inserted into the power distribution unit after the sockets have been mounted and wired.

The use of IDC terminals is particularly efficient. Several outlets can be wired quickly and reliably in a single process step. This highly efficient form of wiring significant reduces assembly time and cost. For individual power supply and status indication, the phase contact is designed as a PCB connection. On request, this terminal can also be offered as quick connect or solder terminal. SCHURTER offers the 4710-5 outlets in black, white and grey for multiphase distinction.

The 4710-5 series is available in two versions: “along” and “cross” to the pin axis. Selection depends on the design of the PDU and the arrangement of the outlets, vertically (along) or horizontally (cross) one behind the other, thereby properly orienting the wires to the direction of the strip. To avoid unintentional power cord disconnection, the new outlets offer the V-Lock cord retention system. The snap-in mounting of the 4710-5 is designed for panel thicknesses of 1.0 to 3.0 mm. Standard versions are available in 1.5 and 2.0 mm.

Technical Data / Approvals
* Appliance outlet Type J (C19) acc. IEC 60320
* IEC/EN 16 A / 250 VAC; 50 Hz
* UL/CSA 20 A / 250 VAC; 60 Hz
* IDC-Terminals for cross sections 10 AWG/6.0 mm2, 12 AWG/4.0 mm2, 2.5 mm2
* Wire arrangement „Cross“ and „Along“ to the outlet contacts
* Snap-in mounting for panel thickness from 1.0 to 3.0 mm
* IP Protection: From front IP 20 acc. IEC 60529
* Insulation protection class I acc. IEC 61140

Application
With its unprecedented functionality and compact design, the new appliance outlet 4710-5 is optimal for intelligent appliances with multiple outlets, such as intelligent PDUs and UPSs used in data centers.

 

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

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

Schurter Metal Line Switch with Ring Illumination

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* First-class workmanship (haptics, optics)
* Outstanding tactile feedback
* Homogeneous ring illumination
* Vandal-proof (IP67 and IK07)

Schurter has revised and fine-tuned its MSM Metal Line series with ring lighting, which has been successful for years.

The optimized switches of the MSM family still have the same diameter of 19, 22 and 30 mm. The high-quality housing made of either robust stainless steel or aluminium also remained untouched.

Two things have changed: By cleverly selecting a new material that diffuses the light much more widely, the LEDs used for ring illumination are no longer individually visible. One can now truly speak of homogeneous illumination. Secondly, the ratio of housing diameter to the width of the illumination ring has been redesigned, resulting in a more pleasant, scaled appearance.

What has remained, however, is the robustness of the switches: Due to the high sealing protection and impact resistance values of IP67 and IK07, the switches are particularly suitable for use in devices in harsh environmental conditions or in applications that require protection against vandalism.

Due to the mechanical stroke, also the new MSM versions from Schurter offer unparalleled tactile feedback.

Technical Data / Approvals
– Switching function: momentary
– Supply voltage: 24 VDC
– Switching voltage: max. 250 VAC / 30 VDC
– Switching current: max. 10 A / 100 mA
– Switching power: max. 2500 W / 3 W
– Resistance when open: > 100 MO
– Resistance when closed: < 30 mO / < 50 mO
– Actuation force: 4.5 N
– IK protection: IK07
– IP protection: IP67
– Operating temperature: -25 °C to +85 °C

Applications
– Industrial applications
– Medical devices
– Public vending machines
– Laboratoy instruments
– Building technology
– Maritime applications

 

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

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

Schurter MGA-A 1206 SMD Fuse with 125 VDC

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* No tin whiskers, no tin dendrites
* Lead-free coating (RoHS conform)
* Similar fuse qualification as in MIL-PRF 23419
* Hermetically sealed and robust construction

Schurter extends its successful MGA / MGA-S line of 1206 dimension SMD ceramic fuses with an aviation version that is tin whisker free and completely dispenses with leaded coating.

Crystalline tin dendrites and tin whiskers pose a considerable risk of short circuits in highly dense electronics. Dendrites form during the electro-deposition process, whereby heavy marks could appear on the fuse end caps or housing. A thorough inspection and cleaning is required according to MIL-PRF 23419. Tin whiskers form after the electro-deposition process. The cause is not well understood, although adding lead to otherwise pure tin soldering is commonly used as a preventable measure.

However, lead has become an unwanted element according to many environmental initiatives, e.g. RoHS directives. For this reason, Schurter has extended the successful SMD thin-film fuse family MGA with the new –A variant. In addition to the classic MGA and the ESA-certified MGA-S space fuse, the aviation version, MGA-A, uses gold alternatively to lead. Gold plated end caps provide a surface where neither whiskers nor dendrites can form. This makes the new MGA-A a safe solution for use in not only highly sensitive electronics in the aviation industry but often suffices for use in the industrial grade space sector.

The technical design is similar to that of the ESA-certified MGA-S. This means: hermetically sealed, ultra-robust construction, which is ideally suited for use in intrinsically safe applications according to ATEX and IECEx requirements. Despite its very small footprint (1206), the MGA-A has a particularly high breaking capacity of up to 300 A at 125 VDC and can be used in a wide temperature range of -55 °C to +125 °C.

The new MGA-A from Schurter is suitable for all applications where the highest demands are placed on reliability and availability.

 

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

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

Bulgin Introduces the New Capacitive Switch Range

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Bulgin is pleased to announce the launch of a new range of rugged capacitive touch switches ideal for repetitive operation. The sealed IP68 rated switches are activated by the touch of a finger and can be used across a wide range of applications from heavy industrial to consumer appliances.

 

Key Features:

• The switches require no operating force to activate, offering both ease of use and a long life expectancy of up to 50 million operation cycles.

• Dust, water and vandal resistant, making them highly robust and durable.

 

 

Additional Available Feature:

 

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

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

Bulgin’s New X Code Additions for the M12 Range

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With a high degree of mechanical and electrical stability, Bulgin’s M12 X Code connectors provide a cost effective and flexible connectivity solution for onsite installations – helping to decrease downtime in process control, manufacturing automation and industrial instrumentation applications.

Key Features:
*  Maximum Data Signal Rate 10Gbit/s
*  – 25 °C to 85 °C Temperature Range
*  Water and dust proof (IP67)
*  8 Pin or Socket
*  Cat 6a cables

Choice of Terminations:

 

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

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

Schurter Type DD12 Compact Power Entry Module with Filter

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* Very compact design
* Various mounting options
* Variants with ground choke
* V-Lock cord retention
* Fuseholder meets latest IEC standard#

Schurter extends its successful power entry module series DD12 with new variants for screw and snap mounting. New versions are also available with additional ground choke for suppressing high-frequency interference on the ground conductor. The DD12 with fuse holder, switch and filter offers remarkable functionality in a very compact housing.

The DD12 filter series combines an IEC C14 appliance plug with a 1- or 2-pole fuse holder, a 1- or 2-pole switch and a high-quality mains filter. The particularly wide metal flange (horizontal or vertical) make contact with the housing surface over a large area and thus enables an optimum filter and shielding effect.

Ground Choke
The DD12 series is now available with a ground choke. In addition to the current-compensated choke on the pole and neutral conductor, the line filters have a second choke on the earth conductor. The ground choke is located between the device plug and the filter output. Placing the filter directly at the mains input ensures that possible high-frequency interference currents on the earth conductor cannot bypass the filter via the housing. The versions with medical filters (no Y capacitors) especially benefit from improved asymmetrical attenuation in the higher frequency range due to the earth line choke.

Applications
The DD12 series is available with standard or medical filter. It is suitable for use in devices that require a particularly high immunity to interference. These include IT or telecom systems according to IEC 90650-1 and medical devices 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 DD12 series is certified for currents up to 10 A/250 VAC according to IEC standard and 8 A according to UL/CSA standard at 125/250 VAC. It is ENEC and cURus approved.

 

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

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

Hylec Launches New TLM Series Screwless Push Wire PCB Terminal Blocks

Hylec-APL, the specialist supplier of electrical components and enclosures, has announced the extended TLM Series of screwless PCB terminal blocks. Needing no special tools, the TLM Series offers fast connection for wire sizes between 0.05mm² and 8.37mm² and are shock-resistant. Devices within the TLM Series are available in multiple styles and pitches to offer designers optimum flexibility in design and the possibility of saving valuable PCB real estate.

Just a short description of a few of the terminal blocks within the TLM Series illustrates the breadth of this comprehensive series. The TLM250C is available from 2-pole, has a sprung screwless push wave design with long pin close to the side cover. On a 2.50mm pitch, rated voltage is 250V, rated current 2A and minimum wire size AWG20. The TLM250D models are the short pin close to side cover equivalent, again rated for 2A/250V. The TLM900R is also available from 2-pole, with a sprung screwless pushbutton wave horizontal 2.54mm pitch design which is end stackable. Rated voltage is 150V, rated current 2A, with wire sizes 26 – 20AWG (0.2/0.5mm²). An equivalent vertical model, the TLM900V is available too. On a 3.50mm pitch, the TLM002C and TLM002D are 2 pole spring screwless pushbutton Wave designs with either long pin close to side cover or short pin close to side cover. The single row, design is rated 250V, 2A, with a wiring orientation of 135 degrees wire to board. The TLM-302R screwless push button design on a 5.08mm pitch offers rated voltage of 300V and rated current of 10A in 20 – 14 AWG size. The design is 180 degrees wire to board.

Three new 300V 15A devices with 2 – 24 poles, designated TLM-203B, have now been added to the TLM Series which will continue to be expanded, with new models currently in development. The three new TLM-230B models are available in 5.00mm, 7.50mm and 10.mm pitches, with rated voltages of 300V, rated current of 15A for wire ranges between 28-12AWG(0.2-2.5mm²).

Suitable for through-hole mounting and in pushbutton Wave and tool-operated variants, Hylec’s screwless push wire PCB terminal blocks are available in green, with some styles also available in grey, black and orange. Hylec also supplies matching green and black fuse holders.

 

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

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

Bulgin – What Makes a Harsh Environment Connector?

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

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/

Schurter Type DG11: IEC Appliance Inlet C14/C18 with Circuit Breaker TA35

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* Elevated IP protection from IP40 up to IP67
* Recessed rocker prevents accidental manipulation
* Wide range of mounting options
* V-Lock cord retention

With the DG11, Schurter launches a variably mountable IEC appliance inlet with integrated device protection switch TA35 for a variety of applications requiring, among other things, increased IP protection.

The DG11 represents a logical evolution of the proven and widely used Schurter 6135 power entry module. It combines the advantages of the already introduced DF11 with a particularly compact design.

Wide Range of Mounting Options
The new DG11 is available for almost every mounting variant with snap or screw mounting. The latter can be done in front mount or rear mount version. In addition, holes for the screws are available in either a vertical or horizontal arrangement.

TA35: Wide Assortment
The DG11 includes a 2 pole TA35 circuit breaker which provides the function of a device switch as well as thermal overcurrent protection. The thermal overprotection can be done with bimetal mechanism for only one or two poles and is available in finely graduated rated currents from 0.05 A to   16 A. The rocker switch is available illuminated or unilluminated in a variety of colors and markings.

IP Protection
In addition to the IP40 protection in all versions, the DG11 is available in a version with IP67 opposite the device. The use of the device in harsh dust or splash water environments is ensured by a protective cover for the circuit breaker as well as sealing beads and four sealing screws for tight fastening of the base.

Cord Retention
The V-Lock cord retention system can be plugged in to IEC 60320 at 10 A and 16 A. With the V-Lock system the power connector is equipped with a latch that interlocks with a special notch in the inlet and thus reliably prevents the cord from being pulled out.

Technical Data / Approvals
* Ratings IEC/CCC 10 A / 250 VAC; 50 Hz
* Ratings UL/CSA 15 A / 250 VAC; 60 Hz
* Dielectric Strength
> 2.5 kVAC between L-N (1 min/50 Hz)
> 3 kVAC between L/N-PE (1 min/50 Hz)
* Allowable Operating Temperature: -25 °C to 60 °C
* Suitable for appliances with the protection class I or II acc. IEC 61140
* Terminals: Quick Connect 6.3 x 0.8 mm
* IP Protection from front: IP40 or IP67 acc. IEC 60529
* Snap in mount for panel thickness from 1.0 up to 3.0 mm
* Screw on mounting for IP40 variants excludes screws and nuts (recommended torque 0.25 Nm)
* Screw on mounting for IP67 variants include sealing special screws. Screw nuts are not included (recommended torque 0.25 Nm)

Applications
Witch thempact form factor and the broad functionality, the DG11 is ideal various industrial appliances. Specially well suited are appliances for medical or laboratory use, such as shaking water baths ultrasonic cleaners, overhead stirrers and many more. Here the variant with IP67 is specially well suited, as it can cope with sterile environments.

 

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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