Archived 2016 Lapp Group International Catalog

Appendix Glossary

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Glossary

Simply and quickly find the most important terms relating to electrical engineering.

A Absorption Cause for attenuation of a fibre optic cable.

Analog signal transmission Transmission of continuously variable signals with which the light out- put is modulated. Angle of beam spread Half the vertical angle of the cone within which the injected power in a light waveguide with uniform illumination is equal to a specified fraction of the total injected power. ANSI Abbreviation for the American National Standards Institute. An American committee which, similar to the German DIN, develops and publishes standards. Antenna cable Antenna cables are coaxial high-frequency cables for receiver connec- tions, domestic distribution grids and single antenna installations. They are mainly used in receiving and distribution stations for sound and television broadcasting. They must guarantee a low-reflection signal transmission. Anti-kink cable glands Mechanism that is part of a cable gland and provides additional protection if a flexible cable is frequently subjected to bending (e. g. SKINDICHT ® SR-SV-M at Lapp). Antioxidant, Oxidation inhibitor As antioxidants may colour rubber compounds, they are generally only ever used for dark compounds. They prevent the compounds from becoming brittle too early. Approved cables Approved control and data network cables with certification, standards such as VDE, UL/CSA. Armouring Also known as reinforcement. Armouring is a mechanical protection for cables. It is produced in a variety of ways and using a wide range of materials, depending on the expected loads on the cable. It can be made of steel wire braiding, circular or flat steel wires, strip iron or combinations of these materials. Armouring types Commonly used are the flat steel wire, steel band, profile steel wire and round steel wire armouring with outer protective cover. There are also steel wire armourings with an anti-twist tape (steel band), however without an outer protective cover (for interior spaces). Armouring, armour A special electromechanical or mechanical protection against external stresses, for the improvement of the reduction factor and for the absorption of tensile forces. Plastic fibres are used instead of metallic armouring for fibre optic cables.

ACR Abbreviation for Attenuation to Crosstalk Ratio. The ACR value indi- cates the relationship between the near-end crosstalk and the attenu- ation at a certain frequency.

Address bus System of associated cables, to which address bits can be transferred.

Adhesion Adhesive, cohesive and density property of the outer sheath of a cable. “Low adhesion” property important e. g. for drag chain use in order to avoid the cables from sticking to each other. Aging The change in the properties (predominantly tensile strength and expansion) of a material over time under specific conditions such as temperature, UV radiation, ozone influence, chemical and thermal loads, etc. Aging resistance As cables are often subject to environmental influences over decades (life cycle), i. e. chemical, electrical and climatic exposure, it is these properties that are to be tested. Here, all the materials found in cables are briefly tested under extreme conditions. All materials should have a very high aging resistance. Alternating current The alternating current is produced by linking three alternating cur- rents with identical oscillation values and frequencies. Also known as multi-phase alternating current. Aluminium sheath The aluminium sheath is lighter than the lead sheath, has better con- ductivity and greater resistance, however must include a plastic sheath to protect against corrosion. American wire gauge Cables or cores according to American cross-sections/dimensions. High AWG number → small cross-section, low AWG number → large cross-section (see Table T16). Ampacity Maximum permitted current that can be transmitted under defined conditions. VDE0298, Part 4. Ampere The strength of an electric current that flows through a conductor. Unit of measurement for the electric current (A).

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