Archived 2016 Lapp Group International Catalog

Appendix Glossary

ÖLFLEX ® ACCESSORIES FLEXIMARK ® SILVYN ® SKINTOP ® EPIC ® HITRONIC ® ETHERLINE ® UNITRONIC ® APPENDIX

Rubber insulated cable Cable with rubber sheathing. For example, H05 RR/RN, H07 RR/RN at Lapp (previously: NMHöu/NSHöu).

Shielding A cover made of conductive material that is placed over an individual core, a group of cores or all cores in a cable. Screening is used to protect the cable against penetration by electrical and/or magnetic fields and to prevent electrical interference from escaping from a cable. Screening takes various forms: a copper wire braid or → cov- ering, copper or aluminium foil wrapping or enclosed tubular copper or aluminium bodies. For the screening, the covering density is defined in percent, relative to the area located below the braiding. Shipping reels The correct choice of shipping reel is a crucial factor in the quality of a cable from winding to installation. The reel size and thus the winding volume is determined by the diameter and length of the material to be wound and the mass of the cable. The delivery agreement between the manufacturer and the customer is determined by the diameter and mass from the production design and the product length. It is critical that the bending radius of the cable, which determines the size of the reel core, is maintained. Shore Hardness of the cable sheath. The definition is: The resistance to pene- tration by another body, which is measured without exception before the occurrence of damage. Shore A test is used for soft plastics, Shore D test for harder plastics.

S S-FTP

The structure of shielded foil and braid twisted pair (S-FTP) cables is made up of a foil screen over all pairs, over which an additional screen of tin plated copper braiding is placed.

Same direction of lay See → Stranding

Sample test, screening Testing of production lengths or production parts in relation to produc- tion quantity. Screened cable Cables with screen in outer layer, over the cores or in double sheath. The screen can be made from braiding, foil or solid metal. With the foil version, a drain wire from the filler strand is used. Identified with a “C”, and with “CY” for additional PVC sheathing if copper braiding used. Self-extinguishing Property of a (synthetic) material to extinguish itself when a flame is removed from the material. Semi-conductor Materials whose electrical conductivity depends on various influences, e. g. current direction, temperature, incidence of light. By mixing with conductive materials (carbon, graphite), insulating materials (PVC) can be modified to give semiconductor properties. Semiconductor bandgap Energetic distance between the valence band and the conduction band of a semiconductor. Separating layer Foils positioned between the individual layers on the cable core to prevent harmful influences. Separator Polyethylene terephthalate foils are used in the cable industry as insu- lating foils. They have excellent dielectric and mechanical properties. They are used as separating foils in PVC insulated cables. SEV Abbreviation for Schweizerischer Elektrotechnischer Verein [Swiss Electrical Engineering Association], testing body similar to the VDE. Sheath print The customer receives information about the printing of cable sheaths regarding design, testing- and operation- related markings, colour codes, customer-specific markings and manufacturer markings. The prints are created using laser and ink-jet printers or print wheels. They are, however, of inferior quality to the embossed letters as they wear away relatively quickly or can be rubbed off. SEMCO Swedish testing body, similar to the VDE.

SIA Swiss format for invitations to tender.

Signal cable Signal cables are used to control the accuracy and precision of electric motors. (For example, ÖLFLEX ® connecting and control cables, ÖLFLEX ® SERVO, UNITRONIC ® data cables at Lapp). Single conductor Conductor which, unlike a strand, consists of just a single wire. A rigid wire is suitable for fixed installation.

Single wire See → Cable, single-wire.

Single-mode fibre Waveguide in which only a single mode can be propagated at the oper- ating wavelength.

Single–wired conductor A single-wire conductor consists of just one wire.

Skin effect The higher the frequency of the effective or interference signal, the more the high frequency current is pushed towards the surface. The skin effect is the property of an alternating or high frequency current in a conductor to move towards the surface due to field line induction processes. This limits the penetration depth of an external electromag- netic field into the object and thus its effectiveness inside. Slave Subscriber in a network that can only communicate in data exchange when addressed by the master (see → ASI). SNA Abbreviation for System Network Architecture. Network architecture concept that enables data to be transmitted between different types of computer.

Sheathed cable Designation for NYM and other sheathed cables.

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