W
15 Posts in this encyclopedia categoryWall thickness
Thickness of a conductor insulation or sheath. (All data without guarantee)
Wavelength
Waves are created when vibrations propagate. The wavelength is the distance between two consecutive points of the same oscillation state (phase). The number of oscillations per second is the frequency. A waveguide is a conductor made of conductive and dielectric material for the low-loss conduction of high-frequency electromagnetic oscillations. (All information without guarantee)
Wheatstone measuring bridge for resistance measurement
This measuring bridge is used to determine the conductor resistance of wires and cables. Its measuring range is between 10 to the power of minus 1 and 10 to the power of 6 ohms. The advantage of this measuring bridge is that no high requirements are placed on the voltage source with regard to the constancy of the voltage. (All data without guarantee)
Whisker formation
Growth of acicular single crystals: Diffusion of zinc or copper atoms from the base material into the tin layer creates tense lattice structures in this area. The reduction of these tensions can cause the growth of needle-shaped single crystals, so-called whiskers, on the surface of the tin layer. Such whiskers can cause electrical short circuits. A nickel barrier layer can prevent such diffusion processes. (All information without guarantee)
Wickerwork
Arrangement of intersecting wires or yarns as part of a cable structure. The braid made of copper wires is used as a shield, while braids made of textile or plastic yarns or steel wires fulfil protective or load-bearing, i.e. mechanical, functions. Braids can be close-meshed or wide-meshed (coverage density in per cent), with different braiding angles. (All data without guarantee)
Winding connection
This is a solderless electrical connection. The contact is made by a bare copper wire that is wound under great tension around a square rod made of bronze, brass or silver (also known as cold welding). (All data without guarantee)
Winding connection
The wire end is wound through a spindle onto a sharp-edged pin. Only for solid conductors. (All data without guarantee)
Winding pin
A connection piece that can accommodate a coiled connection. (All information without guarantee)
Wire bundle
Bare wire bundles are the basic product of stranded copper wires. They are also used as copper strands in wire screens (non-insulated product).
Wire protection
Screw terminals use a screw connection with or without wire protection. The wire guard consists of a metal tongue that is pressed onto the conductor by a clamping screw. The metal tongue is missing on screw terminals without wire protection (Fig. III-5). This means that the conductor ends of flexible conductors must be fitted with an appropriate ferrule. Rigid conductors can be used in both variants without further processing, taking into account the insulation lengths. (All information without guarantee)
Wire wrapping
Core sheaths are mainly used to protect the insulating sheaths of rubber-insulated wires. They consist mainly of fabric tapes or foils. (All data without guarantee)
Wiring cable
A wiring cable is a wire for wiring operating equipment, control cabinets, etc.
Wiring harness
The individual conductors, insulated against each other with plastic, are assembled as bundles depending on their intended use. The cables represent the trunk, the bundles the branches and the individual cores the branches of the cable tree. (All information without guarantee)