Intensive EM fields
Shielding against particularly intensive electromagnetic interference fields
Particularly intensive electromagnetic interference fields can arise, for example, with microwave drying, spark erosion systems and high-frequency welding systems. Regular Rittal standard enclosures are often insufficient in such cases. Instead, we recommend use of the Rittal EMC enclosure.
How we achieve a high shielding effect
The exterior surfaces of the enclosures are connected to one another in an electrically conductive, largely slot-free manner using a conductive special seal. The interior surfaces and sealing edges remain paint-free. Aluminium zinc coating of the base material achieves corrosion protection.
Any enclosure in use is only as good as its machining!
Where cut-outs exist for viewing areas and climate control, care must be taken to preserve the shielding effect (shielded windows, wire meshes, honeycomb structure).
The shielding effect is depicted as follows:
The screening attenuation diagram superimposes the weakening of the fields by the enclosure on a logarithmic scale in relation to frequency.
- 20 dB screening attenuation corresponds to a weakening by a factor of 10
- 40 dB screening attenuation corresponds to a weakening by a factor of 100
- 60 dB screening attenuation corresponds to a weakening by a factor of 1000