Electronics Protection - Summer 2017 - 15

Feature
71. Honeycombs can also be used as flow straighteners since the stucture of the Honeycomb material ensures that
air is blown in a fixed direction.
72. The honeycombs can optionally be provided with a flange so that the Honeycomb after mounting forms one
whole shape with the shielded enclosure (Fig. 25).

Cables

73. Cables from and to a shielded enclosure should also be shielded when no sufficient entry like power line filters
are used.
74. Optimal cable shielding can be achieved with several materials
like conductive flexible shielding tubes, wraps made of knitted metal,
highly conductivity textiles or foils. All these materials can be supplied
with- or without self-adhesive.
75. The cable shield should be low impedance connected at the entrance of the screen, wall or body of the shielded
enclosure. That way there is not only a galvanic connection but this
also creates a high frequency coupling. A full 360-degrees connection around the cable works best. For this purpose we produce cable
entries. (Fig. 26).

Figure 26. Example of a full 360° connection
around the cable

76. Inside the enclosure cables can emit radiation which can then be amplified by the cavity of the enclosure, so it
may be important to also shield the cables inside the enclosure. Tie-wraps and compressible cable-clamping strips
can be helpful to make good connections with the conductive metal connector of the cable.

Fingerstrips

77. To pass on higher currents for entry plates and so on, a very good product are beryllium copper finger strips. Please
note that not all countries accept these due to the % of beryllium which is toxic, therefore we have developed many
other types of conductive gaskets.which are more friendly for the environment and also less sensitive for damaging.
78. For screwed connections the 2400 series twisted fingerstrips are very popular. They can be compressed to the
Fingerstrips material thickness like 0.25 mm. Most versions can be sticked with a self adhesive strip to keep the strip
in place.
79. For shielded doors and Faraday cage doors you need a bigger range of compression. You find these in the 2800
series fingers can be clamped, soldered or screwed.
80. The 2100 series clip-on mounting Fingerstrips can be clamped on regular metal plate thicknesses such as 0.5, 0.8,
1 and 1.5 mm. Some even have lances so that the strip will not slip loose, quickly.
81. When there is a wide range of compression required, our 2200 series Snap-on Fingerstrips or 2300 series Stickon fingerstrips may be suitable. These fingerstrips with self adhesive can be integrated in the construction. Snap-on
Fingerstrips can be firmly mounted in slots so that also a compression to nearly 0.25 can be realized.
82. For special constructions the 2500 series show fingers mounted under an 90° angle.
83. For circular mounting the fingers in the have on top of the finger spherical tips so that there is under any angle
a good point contact.
84. For sliding, rotating and moving applications, please contact our specialists. To prevent wear down there is a
conductive lubricant available.
For more information about shielding in your applications, please contact Holland Shielding at hollandshielding.com.
www.ElectronicsProtectionMagazine.com * Summer 2017

http://www.hollandshielding.com http://www.ElectronicsProtectionMagazine.com

Table of Contents for the Digital Edition of Electronics Protection - Summer 2017