Archived 2016 Lapp Group International Catalog

Appendix Glossary

ÖLFLEX ® ACCESSORIES FLEXIMARK ® SILVYN ® SKINTOP ® EPIC ® HITRONIC ® ETHERLINE ® UNITRONIC ® APPENDIX Digital signal transmission Transmission of a signal using binary light pulses in a period time pat- tern. Dimension A term for the geometric size of a wire or strand, expressed as a diam- eter or cross-section. Often used in conjunction with the number of cores, e. g. 18 x 1.5 mm 2 . DIN Abbreviation for Deutsches Institute für Normung [German Standardi- sation Institution]. It is based in Berlin, Germany. Direct line, connecting cable A connecting cable is a cable that has a coupling connector through which the network connection is established. The fixed connection is found inside the device. The device is portable. The coupling connec- tor contains earthed contacts and is thermoplastically moulded to the cable. Connecting cables are, for example, used to connect portable telephones. Dispersion Dispersion of the signal running time in a light waveguide. It is made up of various components: mode dispersion, material dispersion and waveguide dispersion. As a result of its dispersion, a light waveguide acts as a low-pass filter for the signals to be transmitted (see → Trans- mission function). DKE Abbreviation for Deutsche Kommission Elektrotechnik und Elektronik Informationstechnik [German Electrical Engineering, Electronics and Information Technology] in DIN und VDE. It is a branch of the DIN and its agency the VDE (Electrical Engineering, Electronics and Information Technology Federation). As a national organisation for formulating standards in electrical engineering and information technology, the DKE deals with important interdisciplinary issues such as safety, EMC, components and performance of conventional electric circuits, mobile wireless communication, software and Internet protocols. DKE is the German member of the European and global standardisation organisa- tions. The DKE implements and publishes the results of standardisation work by the → IEC, → CELENEC and → ETSI in national standards. Drag chain cables Drag chain cables are cables used in power chains (e. g. ÖLFLEX ® FD, ÖLFLEX ® SERVO FD, UNITRONIC ® FD plus at Lapp). Drain wire Single- or multi-wire non-insulated conductor that is run in close metal- lic contact under a screening. Ductility, flexibility As all cables and cores are liable to mechanical stress, they are also checked for flexibility, i. e. bent several times around various bending radii. There may be no visible damage to the cables, sheaths, inner or outer protective covers after testing. All stranded elements, braidings and wrappings must also remain correctly in place. In addition to the diameter of the strand assembly and the number of elements to be stranded, the length of lay plays a significant role in the flexibility of a cable. Based on the following principle: The shorter the length of lay, the more flexible the strand assembly. DIN EN European standard added to the German body of standards.

Dummy If there are “openings” detected in the cable, dummy elements or dummy cores are inserted and stranded together with the cable assembly. Dummy elements are generally made from cheap, inferior materials such as polyethylene twine, spun rayon and cotton. They are usually the same size as the real stranding elements.

Duplex operation Transmission of two independent signals over a particular distance.

Duroplastic In contrast to thermoplastics, after heating duroplastics cannot be deformed by heating them again. Duroplastics are required in the cable industry, e. g. as cable fittings or connectors. E Earth connection Earthing of a point of the circuit, such as the neutral point, neutral conductor, midpoint or outer conductor. Earth electrocode, ground system Conductor that provides a conductive connection to earth. For exam- ple, it can be embedded in the ground or have a large area in contact with the ground. Earthing Earthing guarantees a clear reference potential for screening the active and passive components of a network. ECAD The ECAD component standard is a manufacturer-independent stand- ard for describing item and engineering data in electrical engineering, specifically for machine and equipment manufacture. Elastomere Elastomers are widely used for sheathing and insulating cables because of their excellent electrical and mechanical properties. Elasto- mers are high-molecular materials, whose elasticity depends on the degree of cross-linking. The biggest difference between elastic and plastic materials lies in loading and relief. After relief, an elastic mate- rial reverts to its original shape. Electric circuits In a cable, circuits with different voltages can be operated if they are insulated for the maximum voltage that occurs – VDE 0113 Part 1 and VDE 0100 Part 520. Electric Field When voltages are applied to cables, electrical fields are formed, which can take on different shapes depending on the cable construction. In the low voltage range, up to approx. 1 kV, electrical fields have only a negligible influence on the dimensions of the insulating walls. To guarantee operational safety, there are high demands on the materials and dimensions in the high voltage range. An electrical field is repre- sented by field lines. The density of these field lines indicates the force that exists between the two points on a field line (voltage). Electric diameter of conductors Determined on cables by electrical resistance measurements. EIA Abbreviation for Electronic Industries Associations.

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