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Electronics enclosure manufacturer Schroff has introduced a range of rugged 19in cabinets specifically developed to handle the rigorous demands of underground railway applications.

Utilising an alternative cable-channel design, the Varistar cabinet achieves EMC performance while reducing installation time by allowing existing cable assemblies to be routed into the cabinet without the need for re-termination.

Offering a static load-carrying capacity of up to 800kg, the cabinet features a closed rolled-steel frame construction for high stability and resistance to shock and vibration.

Tests carried out in accordance with IEC 61587-1 indicate a shock resistance of up to 5g and an earthquake resistance up to Bellcore Zone four.

The range includes standard configured cabinets in two sizes of 38U and 43U.

The smaller version has overall dimensions of 1,800 x 600 x 600mm and features a single 100 x 100mm cable channel.

Equipped with a 48VDC fan tray, it can be specified with or without battery shelves.

The larger 43U model measures 2,000 x 600 x 800mm and has a double cable channel, which makes it particularly suitable for use where numerous cables need to be fed into the cabinet.

This model is equipped with a 230VAC fan tray.

Front and rear-doors are vented and fitted with dust filters, and the cabinets are finished in London Underground approved low smoke, halogen free (LSHF) light-grey paint.

All plastic parts carry a UL 94 V-0 flammability rating.

For over four decades Schroff has been a world leader in the development and manufacture of electronics packaging components and systems.


The company offers a comprehensive range of enclosure solutions, including cabinets, subracks, cases, backplanes and power supplies, as well as complete systems for standard bus architectures such as VME, cPCI, AdvancedTCA and MicroTCA.


These products are based on the know-how of specialists in the integration of mechanical, electronic and thermal management systems, together with many years’ experience of the most diverse applications in all kinds of environments. Schroff technical personnel are also heavily involved in the development of international standards for electronics packaging systems, with representatives on numerous working groups of institutions such as the IEC, CENELEC, IEEE, BSI, VDE and DIN.


To complement its wide range of products, the company has established a co-ordinated service strategy designed to ensure that customers enjoy comprehensive support throughout the life of the product.Grouped together under the banner ‘ServicePLUS’, Schroff’s product support services are now arranged in eight modules comprising configuration, assembly, modification, solution, express, support, academy and lifecycle.


The Schroff website, provides full technical information on all of the company’s products, including detailed descriptions, technical data, user manuals, test reports and downloadable CAD drawings

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