Cable trays: even faster to install

November 3rd, 2011 | 2 Comments | Posted in Electrical distribution
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There is no lack of innovation in the field of cable management systems for wires, cables and optical fibers.  Not so surprising as cable management systems represent a significant cost in labor and are key to the networks distribution strategy.

One could think that cable trays in steel wire or in sheet metal have reached a peak in innovation. Manufacturers are always launching new functions or new assembly methods in order to stand out in a very competitive market. The overall trend is the simplification of ranges and thus the speed of installation. Distributors (who want to stock references and accessories always more polyvalent and less bulky), installers and their subcontractors (in permanent search of saving time on the worksite) are directly concerned.

Intuitive and no cut-out assembly

CTS : stored flat, this angle will be quickly shaped when the time comes.

CTS with its brand CES, proposes for example intuitive assembly solutions while trying to limit the need for cut-outs as much as possible. Cut-outs constitute indeed a waste of time and increase the risks of accidents. Besides, this manufacturer should soon launch a significant improvement for the standard rail 41x41mm, integrating more functions… and fewer accessories.

Gewiss offers a variable-angle elbow named Maricurve that adjusts without cut-outs. A plier or a hammer are sufficient to initiate the needed deformation and to adapt the angle at the worksite. All this based on one single element delivered straight. This accessory ensures an automatic coupling and guarantees ground continuity.

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Warmth, cold, humidity: the proper atmosphere inside the enclosures

October 14th, 2011 | 3 Comments | Posted in Panel Building
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Most of the electrical panels and switchboards don’t need any thermal management for their internal atmosphere. The variation range of their internal temperature remains acceptable through the seasons and stays within the limitations imposed by the incorporated devices. However, some electrical switchboards should deal with extremely cold temperatures (technical rooms in the mountain) or with very warm or humid atmospheres (installations in Africa, in the Far East,…). Without going that far, some electrical switchboards contain a high density of power electronics devices. These electronic devices are more and more compact and generate a high level of heat dissipation. It is particularly true as examples for transformers, and for variable speed drives too. This situation is also frequent in little or big computing rooms. So, what are the solutions for electrical switchboards? Read the rest of this entry »

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Missed something? Here are September main subjects.

October 7th, 2011 | Make a comment | Posted in Last month main subjects
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This month in the community we have launched a survey about MV/LV transformer protection. We also published a blog article, about the US regulations regarding the protection of maintenance people, from the risks of Arc Flash named Arc Flash: are NFPA 70E and IEEE1584 dangerous? In the following article we will evoke some topics which have no answer in the forum and also introduce a member, Manh_hoa09 .

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Arc Flash: are NFPA 70E and IEEE1584 dangerous?

September 26th, 2011 | 11 Comments | Posted in Electrical Safety
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My name is Günther Müller, I have 20 years of experience in electrical engineering, and I work for a Consultant in Germany. I currently work on the extension of the electrical installation of a site in Europe, owned by a large American industrial group.

In this context, we were asked to evaluate the risk related to Arc Flash, in compliance with standard and the calculation methodology. It was the first time I had to do this evaluation, as this is a US standard which I did not know about and which has no equivalent here.

First, we had to make the audit of the existing installation, and the dimensioning of the extension. Then, we had to make the estimation of the Arc Flash risk level for every , in order then to choose the category of PPE (Personal Protection Equipment) which electrical maintenance people should wear when operating on or near these equipments.

But now I really wonder: will this really help to protect the maintenance operators against arc flash risks?

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Missed something? Here are August main subjects

September 1st, 2011 | Make a comment | Posted in Last month main subjects
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In August, a debate about the IT has been launched, if you haven’t participated yet, why don’t  you share your opinion with the other members? In this article we will evoke some forum topics with no answer and introduce a member of the community, Ally Kanyonodo.

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