Press: Improved HF shielding thanks to new EMC fan-and-filter units

Electric and magnetic fields, which can quickly lead to malfunctions, are everywhere - from industrial applications to data communication and telecommunications. If switchgear or IT applications are exposed to extremely high electromagnetic interference fields, special EMC enclosures with high HF shielding are used. In order to ensure the stability of EMC also when cooling with fan-and-filter units, special EMC fan-and-filter units are a must. Rittal now offers a clear improvement in shielding and attenuation with the newly developed EMC fan-and-filter unit series.

What is new is that the entire fan unit - consisting of housing and filter mat - is designed for optimal EMC protection. Although until now special EMC wire gratings were necessary for shielding, users can do without them in the future. The manufacturer achieves significantly improved shielding or attenuation by means of metallised surfaces, both of the filter housings as well as of the filter mats, with copper-nickel-chrome coatings. The EMC fan-and-filter units from Rittal thus meet the requirements of performance level 2 according to EN61587-3:2006. They establish a minimum attenuation of 40 dB for the frequency range of 30 to 230 MHz and 30 dB for the frequency range of 230 to 1,000 MHz.
The fan-and-filter units can be easily clipped into the corresponding mounting cut-out on the enclosure or housing and bolted down. Attachment of a self-adhesive circumferential contact film additionally ensures reliable and comprehensive securing of the fan-and-filter unit to the inside of the enclosure or housing.

Like the current TopTherm fan-and-filter unit series from Rittal, the new EMC fan-and-filter units from Rittal also have a high-pressure diagonal fan technology - a synthesis of radial and axial fan technology - and a fan output range of 20 to 900 m3/h. By default, the protection categories range from IP 51 (900 m3/h) to IP 54.

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Rittal GmbH & Co. KG

Rittal GmbH & Co. KG, which has its headquarters in Herborn, Germany, is one of the world's leading system suppliers for enclosures, power distribution, climate control, IT infrastructure and software & services. Customers from all sectors of industry, from mechanical and plant engineering, as well as from the IT and telecoms market are making use of system solutions from Rittal.

Its broad product range also includes complete solutions for modular and energy-efficient data centres: from innovative security concepts for data systems (formerly known as Litcos) through to physical data and system security for IT infrastructures (formerly known as Lampertz). The leading software providers Eplan and Mind8 - Rittal subsidiaries - are supplementing the Rittal product portfolio with interdisciplinary engineering solutions.

Founded in 1961, Rittal is now active worldwide with 10 production sites, 63 subsidiaries and 40 agencies. With 10,000 employees worldwide, Rittal is the largest company of the proprietor-run Friedhelm Loh Group of Haiger, Germany. The entire group employs 11,500 people and expects to generate revenues of € 2.2 billion in 2011.

Further information at www.rittal.com and www.friedhelm-loh-group.com.