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Product Managers at Aerco offering Design Support


Need one-to-one practical advice on interconnect solutions, cable & wire, thermal managment, solenoids, filters ,shield components or other components? Our product managers can save you time and effort with their expertise through our Design Support service from these leading manufacturers.

Call Aerco now on +44(0)1403 260206 

News

What's in a name : Clarity for wire and cable definitions
20/05/2016 15:48:39 NewsCable News

"What's in a name? That which we call a rose, by any other name would smell as sweet." Said Juliet in Act 2 scene 2 of the bard’s classic play. My son always says that Romeo was a dilettante, who would have abandoned Juliet once he had had his fun, if the antagonism between the families hadn’t forced him into making commitments he would not have otherwise made. So, as in cable, names are important, very important indeed.

As an example, it is not unusual to receive a phone call on the lines of “Do you do Cable?” to which we answer yes, “because I want it installed by Saturday for the football!” is the response!

So, definitions are important. But the definitions in the cable industry have been carried over from terms originally used in the industries whose technologies were borrowed, such as the production of rope, ribbon and textiles, and they didn’t always mean the same thing. A wire can be a cable, and a cable can be made of wires. If a conductor is carrying a signal, we tend to call it a wire, whether solid or stranded. The strands themselves will also be referred to as wires. If it is carrying power, we tend to call it a cable. Confused? You will be.

So, a wire is a single insulated conductor, usually employed on its own, or built into a loom or cable assembly. We try not to employ the term for anything else, to reduce confusion.

A cable is a jacketed construction, containing cores or conductors, whether singles, pairs, triples or rarely, quads. These conductors are insulated, in a range of materials depending upon the function, and are constructed of strands, usually solid, 7 strand or 19, although larger numbers of strands are available when greater flexibility is required.

Once a wire gets above a certain size, I would say about 1.0mm², then it becomes a power cable.

As always, it all boils down to communication. Be precise in your description, make sure that both you and the person you are talking to, both understand what you are talking about and are using the same language, and then give us a call at Aerco Ltd, and we’ll make sure that you get the right product for your application, just make sure that it’s not about the football on Saturday.

(by David Cairns)

To learn more cable and wire services and products at Aerco, please message us  or call us on 01403 260206.

Delta 50mm fan from Aerco ideal for wide range of cooling applications
18/05/2016 14:30:00 NewsDelta News

Available exclusively in the UK from Aerco, the Delta AFB05 is a range of 12VDC axial equipment fans built in a 50 x 50 x 20mm frame size.

Designed for use in a wide range of industry cooling applications, the AFB05 is available with supply voltages of 5, 12 and 24VDC and speeds from 4,000 to 7,000rev/min to provide maximum design flexibility.

With a maximum airflow of 9.58l/s (20.3CFM) a highly reliable, maintenance-free ball-bearing system, the range is ideal for scientific cameras, microscopes, gaming machines and many other applications. 

Need advice on fans?

With access to AC and DC fans and blowers from ADDA, Etri, Sofasco, Delta and many others, Jason Slaughter can recommend the best products for your application and budget from heavy-duty blowers to PCB-mounted chip and hot spot coolers.

His clear understanding of the technical issues, combined with a practical approach to samples and prototyping, enables him to provide a highly practical solution to your cooling problems.

Message or phone Jason on +44(0)1403 260206 and find out how he can help.

REF AE659

That depends....
06/05/2016 10:51:55 NewsCable News

How many times have you asked an engineer a question, and had that for an answer? Well, there’s usually a bit more to this statement, and it’s usually “on where you’re starting from”. And this is the case when we try to decide upon a conductor size for a given current.

We are looking for the Goldilocks condition, not too big, not too small, but just right. If the conductor we choose is too big, we will increase the cost of the materials, the weight and the size of the finished unit. If the conductor we choose is too small, we will reduce the life of the unit, and will incur a serious risk of fire. (I know, I did it myself as a very young, very green, design engineer, but only once!) So, we need to look at the factors that choose the conductor size for us.

When we draw power through a conductor, its inherent resistance will cause a rise in temperature, irrespective of the material. This is why, unless other factors decide otherwise, annealed copper is the first choice as a conductor. It has a low conductivity, 94% at 0°C, at £3.60/kg, in comparison to 100% for silver, at £382.30/kg. (The latter figure is why we use copper!) However, that loss of energy will be converted into heat, and as we’ve discussed before, heat is the enemy of cable. The major factor will be the insulation material, PVC for instance, will rapidly fail at temperatures above 105°C, so any current that causes a PVC insulated cable to go above this temperature is too high. Bear in mind, also, that 105°C is pretty hot, especially if you touch it, so you will need to consider what temperature rise the system can tolerate.

But, “that depends on where you’re starting from.” If the ambient temperature of the environment in which the cable is being used is, say 20°C, then you can deploy a higher temperature through the conductor, than if the ambient temperature is say 50°C.

Added to this, we have bundling. Penguins on an ice floe huddle together to keep warm, and take turns at being on the inside, where it is more difficult for the heat to escape. So it is with cable. On the inside of a bundle, the heat generated is shared rather than escapes, in effect, raising the ambient temperature. So, we have to apply a de-rating factor to the applicable current, dependent upon the size of the bundle.

So, the size of a conductor required for a given current depends upon the ambient temperature of the environment in which the device will be used, the temperature increase that can be tolerated in normal usage, the ability for the generated heat to escape, and the insulation material that has been chosen.

If you’re not sure after all of that, (I refer you to my fire), call us at Aerco Ltd, and we shall be only glad to help you choose the right products for your application. And sell you them.

(by David Cairns)

To learn more cable and wire services and products at Aerco, please message us  or call us on 01403 260206.

 

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