FEATURE ENCLOSURES
RITTAL RAISES THE ROOF R
ittal has developed a roof-mounted version of its energy efficient Blue
e+ cooling units, which are designed for enclosures of 800 x 600mm (W x D) upwards and deliver a cooling output of 1.3 kW. The new roof mounted units also feature within the new VX25 large enclosure system as an integrated solution. Roof-mounted climate control units are the top choice in control and switchgear applications where there is a lack of space on the front and side panels. This could be due to physical location of the enclosures and minimal gangway clearance, but could also be due to an abudance of interlocks, switches or other controls preventing adequate space for a wall mounted cooling unit. Air routing within the enclosure is also optimised; the cold air is blown down the front of the enclosure and drawn back up the mounting plate, thereby effectively dissipating the heat from top-mounted components such as frequency inverters. The new roof-mounted cooling units of the Blue e+ series, like the existing wall- mounted units, work with a combination of heat pipe and conventional compressor technology. Energy consumption is very low because neither a compressor nor a pump is required when the cooling units are operating on the heat pipe; only the fans that circulate the air by the heat exchangers need an electricity supply. This cooling method works particularly well if there is a large temperature difference between the inside of the enclosure and the surroundings.
1551V sensor enclosures for the IoT T
he new 1551V miniature ventilated sensor enclosures from Hammond Electronics are designed to house sensors and small sub-systems installed in the manufacturing environment as part of IoT
systems. While there is no relevant international standard, the 1551V enclosures are designed around the PCB sizes selected by leading sensor manufacturers for their latest generations of products. The ABS UL94-HB 1551V is available in black, grey and white as standard; four plan sizes, 80 x 80, 80 x 40, 60 x 60 and 40 x 40mm are all 20mm high, maximum PCB sizes are 74 x 74, 74 x 34, 54 x 54 and 34 x 34mm respectively. Four PCB mounts are moulded into the base and the 20mm height gives enough space for board-mounted RJ45, USB and other standard communication interfaces. To simplify access, the snap-fit closure allows repeated opening and closing without tools. There are ventilation slots on all four vertical faces and mounting slots and a 15mm cable knock out in the base.
Environmental sensors monitoring basics such as temperature, humidity and pressure are
widely installed, and are now increasingly intelligent sub-systems, with data processing and communications capability embedded on a small PCB. For active components that produce relatively large amounts of waste heat, the 1551V obviously provides excellent airflow for cooling purposes.
Hammond Electronics 8 MARCH 2019 | ELECTRICAL ENGINEERING
hammfg.com The additional compressor within the
cooling units only kicks in when a larger cooling output is required. All the active components operate with speed controlled drives so the cooling output always matches what is required, ensuring less energy is consumed. Overall, depending on the ambient conditions and the application, the cooling units of the Blue e+ series use on average 75 per cent less energy than conventional compressor cooling units do. Lower temperature deviations within the enclosure means that the service life of the components installed are extended. In addition, the new units have a
multi-voltage supply making them easy to operate at all common mains voltages and frequencies. This is a huge benefit, especially for engineers who sell their machines worldwide. Blue e+ roof-mounted systems are easy and intuitive to operate, using a touch display for basic settings and to read status messages. The touch display can also be integrated into the door of the enclosure if required. Another option is the IoT interface, which
makes it simple to integrate the cooling unit in an Industry 4.0
environment.The Blue e+ cooling unit is a feature in the new solution which consists of an enclosure with built-in climate control. The cooling unit is installed in the upper section of the VX25 enclosure as a plug and play. The touch display is built into the enclosure door and can be removed for maintenance.
Rittal
rittal.co.uk
New website for JPR J
PR Electronics, a long-established independent distributor of electronic
components and accessories, has launched a new website. Its modern design offers customers simple navigation, fast response, a great user experience and simple online purchasing. Many key component and enclosure
manufacturers are among the 70 plus brands stocked by JPR Electronics. Product ranges include cables and connectors, enclosures, passive and Emech components, electrical, solar and power components and test equipment, educational computing, tools and equipment. JPR are main stockists for CamdenBoss and Salecom switches and offer a full range of Hammond enclosures including modification services.
JPR Electronics
jprelec.co.uk
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