China Zhenglan Cable Technology Co., Ltd Company News

1. What are the types of commonly used wires and cables according to their uses? Answer: According to the purpose, it can be divided into bare wires, insulated wires, heat-resistant wires, shielded wires, power cables, control cables, communication cables, radio frequency cables, etc. 2. What kinds of insulated wires are there? Answer: Common insulated wires are as follows: PVC insulated wire, PVC insulated flexible wire, nitrile polyvinyl chloride mixture insulated flexible wire, rubber insulated wire, agricultural underground direct buried aluminum core plastic insulated wire, rubber insulated cotton yarn Textile flexible wires, PVC insulated nylon sheathed wires, PVC insulated flexible wires for electricity and lighting, etc.   3. What are the cable accessories? Answer: Commonly used electrical accessories include cable terminal junction boxes, cable intermediate junction boxes, connecting pipes and terminals, steel plate junction slots, cable trays, etc.   4. What is the cable intermediate joint? Answer: The device that connects the conductor, insulation shielding layer and protective layer of the cable to the cable to connect the cable line is called the cable intermediate joint.   5. What aspects should be considered when selecting the cross section of the power cable? Answer: The following aspects should be considered: (1) The working current that the cable is allowed to pass through for a long time; (2) thermal stability in case of short circuit; (3) The voltage drop on the line cannot exceed the allowable working range.

Concentric Conductor Shielded Neutral Power Cable has advantages as below: 1. When the power is transmitted, it will not interfere with the surrounding electrical equipment; it also eliminates the impact of external electromagnetic interference on the electrical equipment connected to the cable. 2 It can avoid breakdown or damage caused by strong lightning electromagnetic effect voltage, and improve the lightning protection effect and reliability of high-rise buildings. 3. It can improve the sensitivity of the overcurrent protection device at the hand end of the line, so that the cable and the electrical equipment connected to it can be effectively protected. 4. It has low and uniform positive (reverse) sequence and zero sequence impedance, which is beneficial to improve the quality of copper electricity. 5. The grounding fault caused by one-phase insulation breakdown can be eliminated as soon as possible.

The International Energy Agency recently stated that by 2027, solar power generation is expected to surpass coal-fired power generation and become the main way of generating electricity. So, why is solar power likely to become the main force of new energy in the future? More than a decade ago, solar energy was insignificant in the global energy race, accounting for the smallest share of all major sources of electricity, less than 1%. But things have changed now, with the International Energy Agency (IEA) saying that within three years, solar will generate more electricity than natural gas. Within four years, by 2027, it could overtake coal as the dominant form of electricity generation. Solar electricity installation costs have dropped dramatically in recent years An important reason is that the installation cost of solar power has dropped significantly. Data show that for utility-scale solar energy, the average cost of construction and operation has continued to decline since 2009, and will only be about $36 per megawatt-hour by 2021, a drop of about 90% compared to 2009. The cost of coal has changed little, at about $108 per megawatt-hour in 2021. Bahar, an analyst for the International Energy Agency's renewable energy market, said that solar power is expected to account for almost 60% of new power installations in the next five years. Governments are increasingly paying attention to the development of renewable energy In addition, in recent years, governments of various countries have paid more and more attention to energy security, and have also introduced corresponding policies to support it. According to the EU plan, by 2025, its installed capacity of solar photovoltaic power generation will more than double that of 2020, reaching 320 GW, and by 2030 it will reach 600 GW. The U.S. Inflation Reduction Act is expected to allow solar developers to enjoy certain tax credits within 10 years to carry out long-term and large-scale construction.   Home solar power market has broad prospects Another point that cannot be ignored is that the construction scale of solar energy can be large or small. In addition to huge arrays, it can also be a single battery panel on the roof. Therefore, household solar power generation is also an important market. The CEO of a solar energy company in the United States mentioned in an interview with CNBC that the surge in demand for electric vehicles today may also drive the demand for household solar power generation in the future because it is convenient, cheap and reliable.  

Cable manufacturers are constantly challenged with wider temperature ranges, more shielding functions and higher mechanical durability, as well as characteristics such as bending resistance and chemical resistance required for extremely harsh environments and increasingly complex applications. However, cable failures and system downtime still occur from time to time, why?   Cable Faults Many problems caused by cable faults, especially those operating in extreme and harsh environments, can be avoided if the cables are selected correctly from the outset. People might say that choosing a cable is easy, but is that really the case? Indeed, matching the correct temperature range and relying on a PVC jacket for protection is simple. However, there are far more issues to consider.   Engineers have many details to consider before finalizing a perfectly matched cable. Flex and flex cables require specific flex shields. When the shield is torn and continuity is lost, the choice of standard foil shielding can lead to system failure. The distinction between flexibility and bendability should be kept in mind. It is important that the cables be able to be bent and fitted, the flexible cables are easier to install and also simplifies fault detection in cabinets and cable trays.   When the cable is used to connect to the cabinet, the round cable provides a better seal than the typical spiral cable. Therefore, it is necessary to correctly select the degree of bending after considering the line. In some manufacturing applications, cables will be constantly being bent. Ability to withstand millions of bends is more complicated than flexibility. So, how to choose a curved cable? The first thing to consider is the type of bending, is it uniaxial, twisted, or multi-axial? Each type requires different characteristics of the cable.

Dear Sir/Madame, Email received. Kindly note that we are now spending a 3-day Dragon Boat holiday from June 22nd(Thirsday) to June 24th(Saturday). During holiday we have limit access to email, we're sorry for not being able to reply you or give you quotation timely. Once we come back, we will contact you at our first time. Thanks for your kind understanding. ---------------------------------- Estimado Señor / Señora, Correo electrónico recibido. Tenga en cuenta que ahora estamos pasando unas vacaciones de 3 días en Dragon Boat del 22 de junio (jueves) al 24 de junio (sábado). Durante las vacaciones, tenemos acceso limitado al correo electrónico, lamentamos no poder responderle o darle una cotización a tiempo. Una vez que volvamos, nos pondremos en contacto con usted en nuestra primera vez. Gracias por su comprensión. Zhenglan Cable Technology Co., Ltd 2023/6/21  

1. Contact: The backbone cable refers to the cable directly connected to the power supply; the branch cable refers to the cable that comes out of the distribution box and connects to the user or each workshop; the distribution cable refers to the cable that is electrically connected to the distribution box. Their function is to act as a bridge chain connecting the telecommunications room to each user client.   2. Difference: The number of backbone cables and distribution cables cannot be similar. The backbone cable should be one or two, the branch cable needs more than two, and the distribution cable should be more. Branch cables are divided into vertical branches and Horizontal branch. For vertical branches, they are mainly applicable to high-rise buildings. Generally, they are measured on site and divided according to the drawing, that is, the cross sectional area of cables is selected according to the load of each floor, the cable model is selected according to the fire resistance rating of the project, and the cable length is selected according to the distance between the low-voltage distribution cabinet and the highest floor of the branch; For Horizontal branch cable, the line selection basis is the same as that for vertical branch, but the length of Horizontal branch cable can be larger than the trunk line, but its sectional area should be smaller than the trunk line section. It should be noted that the vertical main line should be higher than the three section levels of the branch line.