Cases & enclosures
ENCLOSURES FOR EXTREMELY HARSH ENVIRONMENTS
n the event of fire in a building or tunnel, the function of alarms, smoke detectors, and fire suppressant devices is vital. It is also crucial for some safety systems to continue operation long after a fire has commenced. This includes water booster systems to supply extinguishers, as well as smoke and heat extraction systems, through to evacuation- able fire brigade elevator systems. To protect the electrical supply to these systems, the enclosures that secure cable junctions, connections, and distribution boards, must provide a barrier to extremes of heat and flame for up to an hour or more. Concrete has traditionally been used as a barrier to encase electrical wiring, but the drawback is a lack of flexibility in installation, and subsequent retrofit. Alternatively, Spelsberg’s Lifeline system provides up to 90 minutes fire protection in a flexible and highly durable enclosure that can be externally mounted on building or tunnel walls. This enables fast and straightforward installation and retrofit of fire-protected devices and cabling whenever required.
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Spelsberg’s fire protection enclosures use heat and fire-resistant materials to achieve electrical functional integrity. Certified between E30, E60, and E90, this guarantees functional integrity of the enclosures for at least 30, 60, or 90 minutes, assisting continued electrical supply to connected devices and are tested in accordance with DIN 4102-12, the European Standard for fire resistance of electric cable systems required to maintain circuit integrity. They also hold certification from VDE, the German electrical standards and testing association.
Constructed from thermoplastic polycarbonate, which is non-conductive during fire or heat exposure, the enclosures also prevent the risk of short circuit. Within the enclosure, high temperature-resistant ceramic terminal block clamps ensure integrity of the housing structure. In the event of fire and the use of sprinkler systems or hoses, the enclosures are protected to IP66 preventing ingress from strong water jets. IK08 rating also means the enclosures provide high resistance to physical impact. The Lifeline fire protection enclosure range covers cabling requirements including connections and junctions, safeguarded junctions with fuses, communication cables for signal and control systems, as well as heavy duty cable connections for tunnels with the Rapid-Box enclosure. All Spelsberg Lifeline boxes are pre-assembled to save time in installation, with only wall- mounting and wiring required. The cable and junction boxes are simply attached by a pair of pre-fitted lugs that allow 90° rotation and the terminal block can be set in a variety of positions. “The Lifeline enclosures are designed to meet the stringent EU and UK regulations on fire protection for use in both buildings and tunnels,” says Chris Lloyd, managing director, Spelsberg UK. “While the boxes achieve this, providing protection for up to 90 minutes, they are fast and simple to install. The advantage of Lifeline enclosures for building and infrastructure managers, as well as electrical contractors, is that fire- protected connections can be quickly added, as and when required.”
Spelsberg Instrumentation Monthly February 2023
www.spelsberg.co.uk
harsh industrial environment can generally be described as a setting in which can cause mechanical/electrical components of applications to be damaged or destroyed over a period of time. Most of quality industrial applications are designed to protect and operate electronics up to a certain level of harsh conditions including but not limited to humidity level, extreme temperatures, ingress of particulates, vibrations, and physical impact. Corrosion resistance, however, is another crucial factor to ensure when industrial applications need to operate without failures and costly downtime under highly corrosive environments with chemicals or salts. Mencom has introduced the E-Xtreme rectangular connectors series engineered to withstand those extremely demanding environments by combining anti- corrosion aluminum with a patented ‘titanium plasma’ coating. This extraordinary protective coating assures a high level of protection against UV radiations, a wide temperature range (-40°C to
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+125°C or -60°C to +180°C with silicone gasket), and stone chips. Plus, the coating provides protection against harsh chemicals such as cleaning fluids, anti-freezing fluids, mineral/synthetic oils, cooling fluids, and diesel fuel. The E-Xtreme enclosures passed 3,000 hours of salt spray tests so they are incredibly resistant to long-term exposure to salt mist. There are two types of levers available for
the E-Xtreme series enclosures. The standard C-type lever is made of a stainless-steel frame and polyamide handle, and it provides an IP65/IP66 protection degree. The E-Xtreme enclosures with the C-type lever are ideal for environments with salt mist, ultraviolet rays, corrosive chemicals, and frequent mating. The V-type lever is ideal for environments with higher humidity levels, lower temperatures with ice, and salt mist because it provides better waterproofing with IP66/IP67 protection rating thanks to its vertical closing movement. Also, the V-type lever is also more resistant to shocks, fire, and chemicals because the lever is made of full stainless steel without using any plastic components.
Mencom
www.mencom.com 61
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