Metric EMC Stainless Steel AISI 304 Cable Glands

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Modern technologies and modern products are becoming more and more efficient and complex. The demands on general safety and functiona reliability are constantly increasing. More electromagnetic interlinks are taking place as a result of the rising number of electronic appliances. As a result, the “EMC Law” was passed. Since 01.01.1996 there is an EU Directive of Electromagnetic Compatibility 2014/30/UE. In the EMC directive, the following objectives are agreed upon:
- A harmonised and acceptable level of protection
- Electronic devices must not disturb one another
- Devices must have their own adequate level of intrinsic immunity to electromagnetic disturbances.
The following requirements on an EMC cable and wiring entry points result from the EMC Law and diverse VDE (Association for Electrical, Electronic & Information Technologies) and ZVEI (Zentralverband Elektrotechnikund Elektronikindustrie E.V.) Directives:
1. The connection of the cable shield/housing must have low ohmic and inductive resistance.
2. Ring-shaped 360° contacting (low ohmic resistance)
3. Short shield (low inductive resistance)
4. Low resistance must be ensured for all environmental influences (dust, humidity, temperature)
5. Large contact surface between the cable shield and the screw connection in order to avoid corrosion and guarantee a good conductive connection. To test the shielding performance of an EMC screw connection, one must view the system screw connection, housing and cables. The obtained measuring result is largely influenced by the shielding effectiveness of the cable used for testing.