Products Hazardous Area Equipment Mining industries made safer Boxes for high power environments
Optical encoders from POSITAL are now suitable for installation in explosive gas and dust atmos- pheres following a newly devel- oped housing with Ex ‘d’ flame- proof enclosure protection. Certified for ATEX groups I and II, the encoders can be used in many applications, such as underground mining machines, oil refineries, chemical plants, grain handling facil- ities and printing presses.
Available with a range of fieldbus or Ethernet interfaces, the encoders offer a variety of mechanical options - users can choose between blind hol- low and solid shaft versions, various flange types and connection options.
Optionally, POSITAL also provides stainless steel (316 AISI) models. The encoders use a opto-electronic scanning method that ensures interference-free measurement. The single turn sensor provides a resolution of 16 bits per revolution. In addition, a maximum of 16,384 revolutions (14 bits) can be measured in multi-turn mode, thereby covering a measuring range of 30 bits. They do not require back-up bat- teries or referencing - they instantly provide current, absolute position and revolution values even after power loss. POSITAL
www.posital.eu T: +48 0759 5840
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Robust sounders and beacons
To meet the need of offshore drilling and production, marine and other challenging environ- ments, Hawke International has introduced a new range of high capacity, environmentally pro- tected boxes for cable termination. The junction box range per- mits up to 12 x 400mm2
cable ter-
minations per busbar. The units are also fully ATEX approved and IECEx compliant.
The heavy gauge grade 316 stainless steel enclosures will resist salt and chemical contami- nation, making them well suited for marine environments. Heavy duty base plates give ample room for cable entry and the installation of cable glands. Compression con- trolled silicone sponge gaskets to the base plate and lid provide an environmental seal so that enclo- sures meet the IP66 standard. Base plates are supplied pre-drilled to accept Hawke cable glands. Each busbar has the capacity to carry up to 2,500A per phase and
can handle voltages of 7.2kV between phases. There are also crimp connections to each busbar and the boxes have been exten- sively tested by accredited test bodies to short circuit currents of up to 100kA for one second. For ease of cable installations there are crimp connections to each busbar and each box is sup- plied with a heavy duty fixing frame and has fixing lugs. Hawke International
www.ehawke.com T: 0161 830 6636
Enter 202 Hazardous area flame-proof barrier glands extended
Aimed at applications that require additional corrosion resistance, Flexicon has extended its range of flame-proof hazardous area EXD barrier glands to provide stainless steel (grade 316) fittings. Suitable for Ex d, Ex e and Ex ta applications the stainless steel fittings have an ingress rating of up to IP69k. They can be used with liquid tight conduit from Flexicon to provide cable protection solutions in Zones 1, 2, 21 and 22.
E2S has introduced its new D range of alarm sounders and combined sounder/beacon warn- ing signals that have been designed for use in harsh envi- ronments where high tempera- tures, shock and vibration or high UV levels are anticipated. The D range is housed in a corro- sion resistant LM6 aluminium alloy enclosure. The D105 is rated 112dB at 1m and the D112 is rated 117dB at 1m. Both are available with a Xenon strobe or LED beacon to generate both an audible and visual alarm from a single unit. Both units offer a choice of 45 different alarm tones, and with the option of activating a second and third tone via additional control cables, it offers the versatility of multiple tones from a single unit at a lower cost. The devices can oper- ate from 12V, 24V and 48V DC as well as 115V and 230V AC. A UL approved version is also available. European Safety Systems
www.e2s.com T: 0208 743 8880
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The stainless steel grade 316 fitting is supplied with a nylon seal and two-part epoxy resin pack, instructions and gloves. It can be used with individual cores or oversheathed cable and the bar- rier gland has an operating temperature of -60°C to 85°C. The new stainless steel flame-proof barrier glands are available to fit conduit diameters from 20mm to 63mm and are available with either metric and NPT thread options. Flexicon
www.flexicon.uk.com T: 01675 466 900
Enter 203 LED low profile bulkhead light for harsh environments
Chalmit’s new Nevis LED bulk- head light features a typical output of 4,058 lumens and is capable of 60,000 hours operation.
The robust light features low energy use and requires minimal maintenance, is flame-proof, ATEX approved and IECEx com- pliant. It is well suited for offshore and marine operations and in haz- ardous areas is classified as Zone 1 and Zone 21. Recognising that such installations are often in salt spray areas needing frequent wash down, the Nevis LED bulkhead has a high ingress protection rating of IP66/67.
The LED light enclosure has an aluminium die-casting in LM6 high purity corrosion resistant alloy with toughened glass lens and long life stainless steel fittings. A side mounted increased safety terminal chamber, with easy access for two M20 cable entries, elimi- nates the need for separate flame- proof cable glands. With a total depth of only 200mm, the unit is suited to low profile applications and can be mounted on ceilings, walls, handrails and poles. Output of the light is not diminished in low temperature environments and will work
down to -55°C. The use of LEDs also produces a much whiter light with a colour temperature and colour rendering near to that of natural daylight. Chalmit
www.chalmit.com T: 0141 882 5555
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OCTOBER 2013 Electrical Engineering
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