Shielding microelectronic equipment from time-variable electromagnetic fields is of vital importance to prevent the induction of currents that can affect the performance of the equipment. Therefor, structural measures are taken in areas where major electronic systems have to be installed. For example, special shielding steel structures around the space are installed to create a cage of Faraday. Cables and pipes entering these shielded spaces perforate the protective screen provided and, if no measures are taken, are capable of conducting electromagnetic pulses and fields into the shielded area.

For the EMC protection of these cable penetrations BEELE Engineering has developed an electrically conductive sealant and conductive tapes and sleeves, that are marketed under the name CONDUCTON. RISE multi-cable penetrations type EMC have outstanding damping properties (30-60 dB) and an electrical resistance of less than 100 Ohm. The RISE-system type EMC is UV and ozone resistant, gas and watertight and fire safe.

In case the penetrations have to be only EMC-proof, the length of the conduit can be reduced substantially. Only 40 mm CONDUCTON putty or CONDUCTON tapes and sleeves can be used. The CONDUCTON putty is most easy to apply for deck penetrations; for bulkhead penetrations the tapes and sleeves are easier to use.

Of course, the RISE-system type EMC can also be used for EMC-proof pipe penetrations.

The RISE type EMC transits consist of a limited amount of components
CONDUCTON tapes and filler sleeves
CONDUCTON and FIWA sealant
CONDUCTON tapes are used for wrapping around the shielding of the cable(s) as well as for filling up larger openings inside the CONDUCTON filler sleeves. The sleeves are used to fill the remaining spaces in the penetration. They are supplied in 40 mm length. The more compact the filling, the higher attenuation will be obtained.

CONDUCTON sealant is an electrically conductive sealing putty based on a single silicone compound. CONDUCTON is also water-repellent. The putty adheres well to metal surfaces and is permanently elastic.

FIWA is a fire-resistant and water repellent sealant based on a single component silicone compound. In the event of fire or at temperatures above 200 oC the sealant expands to about 10 times its original volume. The porous mass that is formed has excellent thermal insulation properties. FIWA is absolutely halogen free and has a low smoke index, a high oxygen index and low flame spread characteristics.

Cables can be ducted through the conduit opening in a random order. After ducting the cables, the sheathing is removed over a length of approx. 20 mm in such a way that the front of the exposed braiding is about 20 mm deep inside the conduit pipe. RISE insert sleeves are then put around the ducted cables and pushed into the conduit pipe, leaving 40 mm free space in front and 20 mm free space at the back of the conduit pipe.

The remaining free space in the conduit is then tilled with RISE empty sleeves. The insert sleeves are pushed into the conduit pipe in the same way as the insert sleeves around the cable. CONDUCTON blind profiles are applied to mark the position for later extensions of the cable set.

After that apply a 20 mm thick layer of electrically conductive CONDUCTON sealant against the backing formed by the sleeves. The putty has to be carefully applied in between the cables and profiles at the place of the exposed braiding and pressed down firmly to assure good conduction to the mass.

A 20 mm thick layer of FIWA sealant is then applied at each side of the conduit. The conduit should be overfilled because some sealant will be pushed between and into the empty sleeves during finishing. To smooth the surface, a cloth that is sprayed with soapy water is used to press down the layer of FIWA. When smoothing is finished a last check should be taken if sufficient sealant is applied in between the cables.
Please refer to our brochure for step by step installation instructions of RISE type EMC deck penetrations.

For the EMC protection of cable and pipe penetrations BEELE Engineering has developed an electrically conductive sealant and conductive tapes and rubber tape/sleeves that are marketed under the name CONDUCTON.

DELTA Electronics Testing in Denmark has tested the attenuation of these RISE type EMC penetrations. The tests (test report DELTA-K221274-2) have proved the outstanding damping properties of CONDUCTON. The attenuation value for CONDUCTON tape and sleeves amounts 20-60 dB. Even the CONDUCTON sealant, that has a higher electrical resistance, shows an attenuation value of 10-30 dB.

The RISE-system, that combines gas and water tightness with fire safety, has also successfully been tested on UV and ozone resistance. RISE pipe penetrations have been artificially aged up to 50 years, after which the expanding properties of the rubber and the sealant were compared with new material. Only minor changes were noticed. The electrical resistance of the RISE-EMC system is less than 100 Ohm.

The RISE-system type EMC is CE-certified