Enclosure/RF Shielding Information
Sep Tue, 2015 / by Rittal Marketing

The requirement profile for EMC enclosures can be determined using the following check-list.

  • What interference occurs in this application? (electrical, magnetic or electromagnetic field)
    • What are the limits of interference which may occur in the application? (field strengths, frequency range)
    • Can the requirements be met by a standard enclosure or an RF shielded enclosure? (comparison with attenuation diagrams)

The requirement profile for EMC enclosures can be determined using the following check-list.

    • What interference occurs in this application? (electrical, magnetic or electromagnetic field)
    • What are the limits of interference which may occur in the application? (field strengths, frequency range)
    • Can the requirements be met by a standard enclosure or an RF shielded enclosure? (comparison with attenuation diagrams)
    • Are there any other EMC requirements? (shielding in the enclosure, special potential equalization within the enclosure etc.)
    • Are there any other mechanical requirements (cut-outs, glazed doors/windows, cable glands etc.)? Every sheet metal enclosure already offers good basic shielding within a broad frequency range, i.e. attenuation of electromagnetic fields.

For large enclosures, medium shield attenuation can be achieved via cost-effective measures to create multiple conductive connections between all enclosure parts.

High shielding attenuation levels in the frequency range above approx. 5 MHz can be achieved via special seals which conductively connect the conductive inner surfaces of doors and removable panels, roof and gland plates to the conductive sealing edges of the enclosure body or frame, largely in a slot-free manner.

The higher the frequencies occurring, the more critical openings in the enclosure become.

Want to know more about our enclosure capabilities? Take a look at our handbook on technical aspects of enclosures today.

Free Enclosure Guide

Related Posts

TOP