Everyone knows that power cables and control cables are all about providing cable transmission equipment. As we all know, power cables are used in urban power grids or power stations, while control cables are suitable for industrial and mining enterprises, energy and transportation departments. In addition to their different scope of application, what other aspects … Read more
The alarm system based on the professional bus form is currently the most widely used, and the aerial bundled cable SANS 1418 is also the most complicated, so I will focus on the discussion here. RVV2*0.3 (signal cable) and RVV4*0.3 (2-core signal + 2-core power supply) cables are generally used between the front-end detector and the alarm … Read more
b230 standardThe structural elements of wire and cable products can generally be divided into four main structural components: wire, insulation layer, shielding and protective layer, as well as filling elements and tensile elements. According to the requirements and applications of the product, some products have a very simple structure, with only one structure of wires, such as … Read more
On February 26, the first domestic pre-qualification test of 525 kV DC cables was officially launched. The test mainly detects the long-term performance of domestic 525 kV DC cables, and provides important technical support for Chinese cable companies to take the initiative in international competition. It is understood that the Dutch government plans to develop … Read more
With the development of society, the scale of the city has been expanding, high-rise buildings have been emerging, and the number of important buildings has been increasing. The fire caused by the electric line, especially the huge fire accident, endangers the safety of life and property, and some fatal and huge fire, often causes a … Read more
At present, the long-distance large-capacity power transmission generally uses overhead bare aluminum cable and wires, and the power transmission in large cities generally uses underground cables, and the conductors are copper wires or aluminum wires. Using these traditional wires or cables, electrical energy will lose 5% to 10% during the transmission process. In order to reduce … Read more
Power cables bring light to the home, add all kinds of fun to life and meet the needs of family life. However, if negligence in the process of wire installation, it is easy to cause various hidden dangers in the home environment. Misunderstanding 3: The wires are buried directly without casing Some irresponsible construction workers … Read more
Power cables bring light to the home, add all kinds of fun to life and meet the needs of family life. However, if negligence in the process of wire installation, it is easy to cause various hidden dangers in the home environment. Misunderstanding 1: Strong and weak electricity sharing AC power is usually used in … Read more
1. Classification and difference of flame-retardant cables The ABC category of flame-retardant cables is classified according to the GB/T18380-2008 standard and is used to evaluate the ability of vertically installed bundles of wires and cables or optical cables to inhibit the vertical spread of flame under specified conditions. 1. Flame-retardant Class A means:Fire Retardant Cable … Read more
Power cables are usually rope-like cables formed by twisting several or several groups of wires. Each group of wires is insulated from each other and is often twisted around a center. The entire outer layer has a highly insulating coating. They are mostly erected in the air, underground, or underwater for telecommunications or power transmission. Cables … Read more