I was very honored to come to Xuzhuang Elementary School today to participate in the donation ceremony! Take this opportunity to express my heartfelt thanks to all employees of Hongtong Cable for all leaders and all teachers and students to give me this opportunity to return to society! And congratulate all students!As an individual, he has a high degree of education. He has joined the army when he graduated from high school. He was eight years when he was a soldier. In the process, deeply realized that due to the low level of cultural level, various restrictions on the development of various tasks. Therefore, Mr. Yu has always had a long -term desire. While the enterprise develops slightly, it is also based on a social responsibility and obligation to do some real things for our students and do something for our students. Of course, this donation is insignificant. While running a good company, Yu always strives to make more contributions to our basic education.Yu always wishes, our students are healthy and healthy, learn every day, and continue to thrive, and become the pillars of the country.

Entering the rainy season each year, especially this year's falling rainwater, this year is particularly much. The common problems that the cables are forgotten after forgetting the head are water. After the cable is in water, under the influence of the electric field, the water tree will cause the cable to penetrate. The water tree is a gap between 0.1m to a few microns. The local high -electric field parts formed by the impurities, pores and insulation and inside and outside semi -conductive electrical layers in the insulation are the starting point of the water tree. The development of water trees is generally more than 8 years. The higher the humidity, temperature, and voltage, the more ions in the water, the faster the water tree develops.CauseDuring custody: The newly purchased tube cables are sealed with plastic sealing sleeves at both ends, but after a while, the remaining plastic paper is wrapped in plastic paper, and the rope is tied outside. Infart in the cable.During the laying of the cable: When the cable is laid, the cable head wrapped in plastic paper is sometimes immersed in water to make the water enter the cable; when traction and pipe pipes, the outer sleeve rupture is sometimes occurred.After laying: The cable head is made in time, so that the unsightly cable ports are exposed to the air for a long time, immersed in water, and water vapor enters the cable in large quantities.During the production of the cable head: when the cable head is produced (including the terminal and the intermediate connector), due to the intention of the producer, the cable end is sometimes slid into a stagnant cable well.During the running of the cable: During the running of the cable, when the intermediate seals breakdown and other failures occur, the water in the cable well will enter the cable along the gap; at the construction site, the external force causes the cable to be damaged or penetrated, and the cable water will also occur.Approach It is very difficult to dry after the cable is dried (such as hot nitrogen and drying), and generally does not configure the corresponding equipment. In actual operation, if the cable is in water, it is just a few meters of the front end. Therefore, the prevention of cable water in water should be mainly based on prevention and the following measures:The cable head should be sealed. The sawing cable end, whether it is stacked or laid, is sealed with plastic (using a cable -dedicated sealing cover) to prevent the moisture from penetrating.After the wire is laid, the cable head should be made in time.

Strengthen the management of cable head production technology. Once the cable is water, it is often the cable header that has an early breakdown. Therefore, the wire head is made well, which can extend the overall life of the cable. For example, when the cable is peeled off the semiconductor layer, a few caves are erected on the semiconductor layer, and then the semiconductor is peeled off like sugarcane peeling. However, when using a knife, if it is too deep, it will hurt the insulation layer and bring opportunities to the emergence of water trees.Use the cold -shrinking cable head. 3M company's cold -shrinkage silicon rubber cable accessories, simple and convenient production, without spraying or welds. And the attachment of the silicon rubber cable is elastic, and closely stuck to the cable to overcome the shortcomings of thermal reduction materials (there is no elasticity of thermal reduction materials. In the process of thermal expansion and contraction of the cable, there will be a gap between the cable body. It provides convenience for the development of water trees).The 10KV system uses a 8.7 / 10kV cable. The insulation thickness of this level of cable is 4.5mm, while the insulation thickness of the 6 / 10kV cable is 3.4mm. Due to the increase in the thickness of the cable insulation, the strength of the field can prevent the aging of the water trees. At the same time, because the LOKV neutral point small current connecting the system is grounded, the cable must bear 1.73 times the phase voltage, and it is required to To run 2h, it is necessary to thicken the cable insulation layer.Use PVC plastic double -wall ripples. The tube is resistant to corrosion, smooth inner wall, good strength and toughness, so when the cable is laid directly, it can greatly reduce the damage of the cable outer cover.Design of cable grooves (tube) and cable wells. Due to the limits of conditions, the cable layout is set in the form of direct burial or cable sourt, and it is mostly buried. If it belongs to the rainy areas of the coast, the cable sourt or cable well has accumulated water in the middle of the middle. Because the depth of the cable sourt or cable will exceed the depth of the sewer, and the drainage is difficult, it should be coordinated during planning to facilitate the drainage of the cable groove (well). If the cable well does not accumulate water, the middle connector in the cable shaft should be supported with a bracket.

Low -smoke halogen -free cables can be divided into low smoke and halogen -free flame retardant series and low -smoke halogen -free refractory series.Low -smoke and halogen -free cables are the production of the Company with reference to the French standard RCCE and NF series standards, and national standards GB/T18380, GB/T19216, GB/T17651, GB/T17650 and national standards are produced.Metro, nuclear power stations, tunnels, power stations, mines, petroleum, chemical industry, etc.In addition to the characteristics of low smoke halogen -free and fire -resistant cables, it can also meet the ability of the line to power power under fire conditions. It is mainly used in the power supply lines of fire alarm, fire protection equipment, smoke exhaust equipment, and emergency channel transportation, lighting and other emergency facilities.

With the rapid development of the Chinese wire and cable industry, 2016 will still be the year of the development of my country's wire and cable industry. The quality is still the top priority of the development of the industry. Facing the pressure of overcapacity in the industry, the country's "Belt and Road" The acceleration of strategy and Chinese equipment will provide new opportunities for my country's wire and cable industry. The entire cable industry needs to continue to practice "internal skills" in quality.At present, my country's market environment in the wires and cable industry is very good. The quality of domestic steel and metal materials in the industry has been further improved to replace imports and change the current only levels of cable varieties in my country to reach the level of acceptance and participation in competition. 70% The cable variety needs to improve the level and grade of production. In the past ten years, the wire and cable industry has spent nearly 100 million yuan for purchasing special equipment for wires and cables, with an average of about 1.5 billion yuan per year. Steel and metal materials account for a large proportion, mainly Yougang, special steel and alloy materials.The role of wires and cables under the trend of energy Internet cannot be underestimated. In short, the energy Internet is to easily achieve energy sharing by combining the Internet with wind energy and solar energy. As a transmission belt for transmission energy power, the role of wire and cable cannot be underestimated. The wires and cables play a very important role in my country's manufacturing industry. At present, the average annual output value has exceeded 1.2 trillion yuan. Wires and cables are wire products such as transmission of electricity, electrical energy, and realizing electromagnetic energy conversion. Under the rapid development of energy Internet today, the wire and cable industry is also trying to accelerate development, striving to overcome problems such as overcapacity, large but not strong, fully seize the opportunities brought by the Internet+strategy, achieve efficiency improvement and intelligent manufacturing.

First of all, many electric workers do not know how the current can be carried by the electric wire and how to convert power. I will explain to you, the power of the single -phase electrical appliances P = UI (this is a blocking load, the sensual load is P = UICOS, you can ignore it) This is the knowledge of junior high school. 1KW is a 4.5 current. For example, the air conditioner 1.5P air conditioner is 2kW, then the current is about 9A. If the conversion power of the three -phase power is p = √3UICOS (here is 0.75), then I = 1000/1.732 * 380 * 0.75. Therefore, the 1kW of three -phase electricity is about 2A. Of course, it is actually necessary to take efficiency.Then let's take a look at the carrier current of the wire and cable. In fact, you can receive it on the Internet. Xiaobian will sort it up here. The following formula is the aluminum line calculation method.Twenty -five or five; (one hundred square meters of cables * 2, 10 square meters are multiplied by 5, for example, 4 square meters are 20A)Twenty -five, three five, four triads;7095 times and half; (2.5 times 70 and 95 square meters)80 % off the temperature of the pipe; (this is a good understanding, we directly multiply 0.72)Copper thread upgrades; (still take four square meters as an example, then use 6 square meters, 1.5 is 2.5, 2.5 is 4 square meters)Add half of the naked line. (No need to watch, the overhead cable -free nude line)Through the above pilot, we know that aluminum lines are rarely used now, most of which are mainly copper lines. Then the 4 -square meter calculation method is a 6 -square -meter calculation method, which is the computing algorithm to the upper level cable. There is also a formula in the actual operation of Xiaobian.Then the 4 -square -meter line can withstand a current of 30A (the wires are basically passed through the tube, the external temperature is high, so it is only 0.72 times), the single -phase electricity is 220V * 30A is 6600W; the three -phase electricity is 15kW, which is very simple. no. Xiaobian is based on the installation or maintenance or decoration of daily electricians. Of course, the electric heating is different (the single phase is 4 times, and the three -phase is 1.5 times the power).

1. Product overview:The rubber sleeve cable is a soft and moving cable variety with multi -stranded fine copper wire, outsourcing rubber insulation and rubber cover. Generally speaking, including general rubber sleeve soft cables, welding machine cables, diving motor cables, radio device cables, and photography light source cables and other varieties.2. Product classification:Rhame cables are widely used in various electrical equipment, such as daily appliances, electric machinery, electrical devices and appliances. At the same time, it can be used in indoor or outdoor environmental conditions. According to the mechanical external forces suffered by the wire and cable, the product structure is divided into three categories: light, medium and heavy. There are also appropriate connections on the section.1. In addition to the industrial use of medium -sized rubber sleeve cables (YZ cables, YZW cables), it is widely used in agricultural electrification;2. Waterproof rubber sleeve cable (JHS cable, JHSB cable), and JHS waterproof rubber sleeve cables are used for transmission electrical energy for diving motors with 500V and below. Under the long -term soaking and large water pressure, it has good electrical insulation performance. Waterproof rubber sleeve cables have good bending performance and can withstand frequent movement.3. The welding machine cable (YH cable, YHF cable) is suitable for the land voltage AC does not exceed 200V and the pulse DC peak 400V welding machine is used for two -side wiring and connected to the welding tongs. Special cables for welded tongs, rated voltage communication does not exceed 200V and the pulse DC peak is 400V. The structure is a single -wire core, which is made of multiple soft wires. The inside of the heat -resistant polyester film insulation band is used outside the wire.4. Light rubber sleeve cable (YQ cable, YQW cable) is used in daily appliances, small electric equipment, and requires good softness, lightweight, and curved performance;5. Heavy cables (YC cables, YCW cables) are used for such as port machinery, probe lights, and large -scale hydraulic irrigation stations. Such products have good versatility, complete series specifications, good performance and stability.

1. Introduction to cross -linked polyethylene insulation power cable:Introduction: Lingyin polyethylene insulation power cables not only have excellent electrical performance, mechanical performance, heat -resistant aging performance, environmental stress resistance and chemical corrosion capabilities, but also have simple structure, convenient use, not limited to laying gap, long -term work work High temperature (90O), large transmission capacity and other advantages.The cross -linked polyethylene insulated power cable products include flame retardant and non -flame retardant series of cross -linked polyethylene insulation electric cables.This product is organized by the national standard GB12706, international standard IEC60502, IEC60332, and IEC60754. The company's corporate standards are not only comprehensively satisfied, but some indicators are higher than the above -mentioned countries and international standards.Flame retardant cables include all series of cables such as A, B, C, low -smoke, low halogen, low -smoke halogen and other series of cables.Our company can organize high -voltage power cables according to user needs? It can also be designed and manufactured according to user needs, cross -linking cables with special requirements such as large -section segmentation conductors, water blocking, deruding, and rat prevention.1. Uses: The cross -linked polyethylene insulated power cable is suitable for AC's transmission circuit from 0.6/1kV to 26/35kV for different ways of conveying power.2. Execution standard:The cross-linked polyethylene insulated power cable executes GB/T12706-2008 standards.3. Use characteristics:1. The long -term high working temperature of the cable conductor does not exceed 90 ° C;2. The high temperature of the cable conductor does not exceed 250 ° C during short circuit (long duration lasts);3. The ambient temperature of the cable is not lower than 0 ° C, and its small curved radius is 20 times the diameter of the cable.4. Condition conditions:1. Lingyin polyethylene insulation vinyl chloride (polyethylene) protective pyramid electric cable is suitable for laying in indoor, tunnels and pipelines, and cables cannot withstand mechanical external effects.2. Lingyin polyethylene insulating steel band armor, polyvinyl chloride, protective cover power cable is suitable for directly buried underground, can be applied indoors, cable ditch, tunnel and pipelines. pull.