1. Selection conditions for 1~5-core cables for 1kV and below (1) Single core cable When the line is long, the working current circuit or the underwater laying, in order to avoid or reduce the intermediate joints, or when the single-core cable has better comprehensive technical economy than the...

(1) Pulse reflection method: In the 1970s and 1980s, the cable fault test generally adopted the flash test method, and the principle was the pulse reflection method (also called the radar method). The instruments used are mainly electronic tubes and transistor circuits, which are bulky. The...

PFA electrode is also called: PFA solid wire, soluble PTFE electrode, soluble PTFE solid wire PFA electrodes are extruded from soluble polytetrafluoroethylene (PFA) granular material. There are two kinds of round and flat. Mainly used for welding various plastics. Soldering Tips: 1. Before...

How are fireproof material standards divided? Fireproof material composition: 1. Inorganic binders: mainly water glass, gypsum, phosphate, cement, etc.; 2. Refractory mineral fillers: alumina, asbestos powder, calcium carbonate, perlite, Taibai powder, etc.; 3. Flame retardant organic resins:...

Copper rod is the main raw material of the cable industry, and there are two main production methods - continuous casting and rolling method and upward continuous casting method. There are many production methods for continuous casting and rolling low-oxygen copper rods, which are characterized...

Stranding (stranded wire): The process of twisting multiple monofilaments with smaller diameters into conductive cores with larger cross-sections according to certain rules. 1. Stranded wire is divided into two types: regular twisting and irregular twisting. Regular twisting can be divided into...

The extrusion process includes the production of insulation and sheathing. Insulation production methods are: coating, wrapping, extrusion, and their combinations. At present, the main insulation production is coating (winding wire, which is no longer within the scope of production license...

Pure copper is a purple-red metal, commonly known as "red copper", "red copper" or "red copper". Pure copper is ductile. Pure copper the size of a drop of water can be drawn into filaments up to two kilometers long, or rolled into almost transparent foils larger than a bed. The most valuable...

1. Large carrying capacity Due to the low resistivity, the copper core cable with the same cross-section allows about 30% higher current-carrying capacity than the aluminum core cable. 2. Good stability and corrosion resistance The copper core is resistant to oxidation and corrosion, while the...

before you buy coax There are many things to consider when choosing the best coaxial cable for your application. What equipment are you using? Cell boosters may require different cables than satellite dishes. Is the cable installed inside or outside? Different use cases require different cable...

1. Antimony flame retardants Advantages: Antimony trioxide cannot be used alone as a flame retardant, but when used in combination with an appropriate halogen compound, it can exert particularly effective flame retardant properties. Antimony series flame retardant synergistic mechanism...

Special cables are cables with special purposes that can be used in specific occasions, such as high temperature resistance, acid and alkali resistance, termite resistance, and wires and cables used in ships, aircraft, nuclear power plants and other occasions. In terms of classification, it does...

The ultra-fine wire stranding machine is a kind of high-speed stranding machine. Both are a type of bundling equipment used in the stranding of cable stranded conductors. So what is the difference between the ultra-fine wire stranding machine and the high-speed stranding machine? Let's talk...

Signal loss per 10 feet Signal loss occurs with all types of coaxial cables. When a signal travels through a cable, it loses energy. This is inevitable. As the cable length increases, more signal loss occurs. Signal gain and loss are measured exponentially in decibels (dB). A 3 dB loss means the...

Rubber-sheathed cable is a kind of soft and movable cable with multi-strand thin copper wire as conductor, outsourcing rubber insulation and rubber sheath. Generally speaking, it includes general rubber sheathed flexible cable, electric welding machine cable, submersible motor cable, radio...

Magnet wire is an insulated wire used to make coils or windings in electrical products. Also called winding wire. Magnet wire must meet a variety of usage and manufacturing process requirements. The former includes its shape, specifications, can work at high temperature for short and long-term,...

How coaxial cables are constructed Before we understand how coaxial cables work, you need to know how they are constructed. As can be seen from the above figure, there are mainly four parts: 1. Core 2. Dielectric insulators 3. Shield 4. Jacket (rubber packing) At the core, coaxial cables consist...

Uses and Applications of Coaxial Cables Cable operators, phone companies, and Internet providers use coaxial cable. They are necessary for applications that require RF transmission, such as: cable TV If you have cable TV, use coaxial cable to transmit the cable company's video and data to your...

XLPE insulated power cable has good thermal-mechanical properties, excellent electrical and chemical corrosion resistance, and also has the advantages of simple structure, light weight, and no drop restrictions on laying. Currently widely used in urban power grids, mines and chemical plants and...

Friends all know that the quality of a product is mainly reflected in the appearance quality of the product. No matter what kind of product it is, it pays attention to the appearance quality in the production and manufacture, and has strict management and inspection on it. The sheath is the...