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Dimming light with LED lighting fixtures

Wednesday, 1 July 2015 PDF icon Dimming light with LED lighting fixtures
From the point of view of lighting design, the lighting needs in the industrial sector are very different according to the type of activity performed. Usually, production areas need lighting systems with a wide beam while, to facilitate the work in the warehouse facilities, lighting fixtures with a narrow beam are preferable. In some cases, presence detection systems can be a solution to reduce the cost of energy but, often, they are not applicable because of worker safety issue. In areas dedicated to production activities, lighting is used throughout the working period and, covered warehouses, have almost always windows through which a certain amount of daylight passes. In this type of environments, it’s appropriate to rely on systems for lighting control in function of the daylight in order to reduce energy costs. These systems use special sensors which measure the incidence and the intensity of natural light allowing the emission of artificial light so much as it’s required to get the level of illumination neaded. Today, thanks to the increasing application of LED technology to explosion-protected lighting equipment, it’s possible to dimming light source even in locations where there’s a potentially explosive atmosphere.

The use of stainless steel on explosion-proof equipment

Monday, 1 June 2015 PDF icon Use of stainless steel on the explosion-proof equipment
In industrial plants such as petrochemical, chemical and, in general, in places with potentially explosive atmosphere and with possible presence of gas or explosive and aggressive dust, different materials may be used, depending on installation, explosiveness and corrosion characteristics. The materials used today in these areas for the realization of electrical equipment, lighting fixtures, fittings and components, are mainly divided into two categories: Ferrous: aluminium with a low content of copper, cast iron, brass, carbon steel, stainless steel; Non Ferrous: mass polyester reinforced with glass fibers and graphite, polycarbonate, borosilicate glass. In this article, we talk about the use of stainless steel as a raw material for the production of electrical equipment and materials, suitable for installation in potentially explosive environment and its ability to withstand corrosion caused by weather and aggressive substances.

The function of cable glands

Friday, 1 May 2015 PDF icon The function of cable gland
The cables entry into electrical explosion-proof junction boxes suitable for areas with hazardous atmosphere can be performed in several ways in compliance with EN 60079-14 standard. We have already discussed in previous newsletters about conduit systems and about the use of sealing fittings. In this article, we will speak about cable systems with the use of cable glands. Cable glands must be constructed according to the Ex "d" method of protection, meet the requirements of EN 60079-1 standard and must be certified and marked. Depending on the type of use, they can be with compression ring and barrier.

Emergency lighting systems in hazardous areas

Wednesday, 1 April 2015 PDF icon Emergency lighting systems in hazardous areas
As everyone knows, emergency lighting means illumination designed to operate when the ordinary one is missing. This is one of the main principals of plants safety to allow the evacuation of people in case of danger, or even, more simply, to allow operators, to move, in case of electrical failure and black out. In systems installed in areas with the presence of a potentially explosive atmosphere, this type of system has several further critical issues compared to a system installed in a safe area.

The illuminance in industrial environments

Sunday, 1 March 2015 PDF icon The illuminance in industrial environments
The visibility of everything that surrounds us is essential to allow us to better understand the nature’s gifts. A proper lighting, whether natural or artificial, means that the objects are more highly valued and perceived. Cortem Group, focused on everything concerning lighting suitable for installation in areas with danger of explosion, has designed a series of products for Zones 1-21 and Zone 2-22, suitable for installation and operation in potentially explosive atmospheres such as refineries, Off-Shore drilling platforms, drilling and extraction FPSO ships, chemical and petrochemical plants, grain depots, paint booths, biogas plants and in all industrial areas where there may be such a risk.

The use of remote phosphor technology in EVE-L series LED lighting fixtures

Sunday, 1 February 2015 PDF icon The use of remote phosphor technology in EVE-L series LED lighting fixtures
The amount of energy resources has decreased as a LED lamp can have 100.000 hours of lifespan compared to 1.000 hours of incandescent lamps and 10.000 hours of fluorescent lamps. Furthermore, LED lamps consume energy equal to approximately 15% of the incandescent lamps of equal power (W). Many are convinced that LED technology is an invention of the last decade or two decades but this is not true. Infact, these days we celebrate the discovery of LED occurred 50 years ago, to be precise in 1962, although the Nobel award in 2014 was not attributed to the true inventor: Nick Holonyak.

New generations of LEDs

Thursday, 1 January 2015 PDF icon New generations of LEDs
We have already spoken about LED lighting and the advantages that this lighting support can provide for lighting fixtures suitable for use in areas with potentially explosive atmospheres. However, the technology in this field is moving so fast that we think is appropriate to analyze the developments. The only term LED is no longer sufficient to identify the wide range of products which has been developed with particular characteristics according to the use. In electronics, the LED (light emitting diode) is an optoelectronic device that exploits the characteristics of semiconductor materials to convert the electric current that passes through it into light. Although the first LEDs were developed in 1962, only in recent years the technological progress has made it possible to fully exploit the LED to replace the traditional light sources with a long series of advantages.

Prevent explosions of metal dusts: analysis of a real case

Monday, 1 December 2014 PDF icon Prevent explosion of metal dusts
An explosion is a very complex physical-chemical process, which responds to dynamics not always easy to completely predict. We all know the pure theory: it’s necessary the presence of fuel, combustion and ignition energy to trigger an explosion. It’s not always easy to foresee, however, how these components are combined and how they are simultaneously present in the course of a machining process. Therefore, a necessary condition to lower the risk level is a more comprehensive prevention action that takes into account the most critical possible factors. This article will analyze a technical incident really happened (source: documentation ASL 14 VCO of Piemonte Region) and will draw conclusions about what can be done to prevent a similar incident.

Aluminium in explosion-proof electrical protection

Saturday, 1 November 2014 PDF icon Aluminium in explosion-proof electrical protection
Aluminium is one of the materials most used worldwide for the construction of explosion-proof enclosures. The excellent features of corrosion resistance make this material universally recognized as the most valuable and versatile for most applications. In respect to the cast iron, aluminium has the advantage of being much lighter and, thus, facilitate both the assembly and the maintenance of the system. Furthermore, it has a excellent corrosion resistance without the need to be protected on the surface, as happens with the cast iron which must be galvanized and varnished protected. Furthermore, in respect to the stainless steels, it has lower cost. The mechanical properties of aluminium alloys castings are highly satisfactory for use in the field of explosion-proof electrical protection.

‘Ex de’ lighting fixtures and floodlights with LED technology

Wednesday, 1 October 2014 PDF icon Cortem LED lighting fixtures and floodlights
It’s appropriate to clarify some beliefs about LED lighting fixtures and, more specifically, about their use in the segment of environments with a risk of explosion and fire: as men progressed in a continuous research of new technologies through by the technique of breaking stones for tools and the creation of energy by exploiting the natural flow of the rivers, in the same way Cortem is pursuing this philosophy approaching new technologies and adapting them to specific projects of research and development without being fossilized in the past. The new series of LED lighting fixtures and floodlights designed by Cortem have nothing in common with lighting fixtures and floodlights for discharge lamps. The old "enclosures" are not suitable to be used as a support for LED and do not lend themselves to dissipate the temperature generated, compromising the proper functioning and durability. Unfortunately, the "adaptation" and the transformation of old Ex lighting fixtures to new LED lighting fixtures are very widespread practices in the market. This leads to poor performance and limited benefits in terms of energy and cost savings for the end user. The use of appropriate LED lighting fixtures allows to obtain numerous advantages.