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22 Posts in this encyclopedia category

Backspin

Back-twist is the force that tries to untwist a stranded cable assembly caused by the torsional stress. (All data without guarantee)

Basic raw materials

In addition to the basic raw material, plastics contain a number of other components such as stabilisers, plasticisers, fillers and colours. (All information without guarantee)

Bayonet locking

Connection that locks by turning a toggle through 90° and is not threaded like a normal screw. (All information without guarantee)

The lay length is the distance (measured in the direction of the longitudinal axis) that the elements of a layer cover after a 360° turn, e.g. 40 mm. It is also customary to specify "laps" per metre, e.g. 40 mm = 25 laps. (All data without guarantee)

Bendability

As all cables, wires and cores are subject to mechanical loads, they are also tested for bending, i.e. they are bent several times around different bending radii. The wires, sheaths, outer and inner protective sheaths must not be damaged after the test. All stranding elements, braidings and windings must also still be in the correct position. In addition to the diameter of the stranding and the number of elements to be stranded, the lay length is also of decisive importance for the flexibility of the wires or cables. The following principle applies: the shorter the lay length, the more flexible the stranding system. (All information without guarantee)

Bending capacity

The bending capacity indicates the permissible bending radius up to which flexible products can be bent without losing their functionality. (All data without guarantee)

Bending radii

Permissible radius for the occasional or permanent bending of wires and cables. The bending radius is defined as x times the cable diameter. The design of the wires/cables determines the smallest permissible bending radius. This can be influenced upwards or downwards. When designing power lines and cables, the permissible bending radii must be observed. The guideline values are between 15 x D and 30 x D, depending on the design and regulations. D is the outer diameter of the cable. (All data without guarantee)

Bit

Smallest unit for representing binary data, meaning either 0 or 1. It is the basic unit for transmitting information in digital systems. A byte is a group of 8 bits. (All information without guarantee)

Bit error rate

The bit error rate is defined as the number of erroneous bits in relation to the total number of bits received. (All data without guarantee)

Bit rate

Also referred to as bit sequence frequency and is the transmission speed of a binary signal. Unit: bit/s (All data without guarantee)

Blind element

If there are so-called open points in the cable or line construction, dummy elements or dummy wires are inserted into the cable or line and stranded. The dummy elements are usually made of materials such as polythene cords, rayon or cotton and are usually the same sizes as the real stranding elements. (All information without guarantee)

Blue wires

Cable for intrinsically safe wires in potentially explosive atmospheres. The identification colour blue, RAL 5015, is prescribed there. (All information without guarantee)

braid

Here, the threads braided on machine spools are applied to the cable core as braiding material. Braiding materials include braiding fillers (silk, cotton) and wires (copper, steel). The braiding surrounds the cable core in a tubular shape. (All information without guarantee)

Braided umbrella

Braided shields are produced by interlacing braided wire bundles (3 - 10 wires/coil). They form a network on the surface of the element to be shielded, which is given a coarse or fine degree of optical coverage by the number and thickness of the braided wires and the pitch angle. This shield is usually applied to wires and cables in the low-frequency range. (All information without guarantee)