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Precautions for Installation and Use of Cable Waterproof Joint
Cable waterproof connector is can be applied to the environment with water, to provide safe and reliable connector joints, one of the most important is to be able to achieve the waterproof effect, then the cable waterproof connector in the installation and use of the process need to pay attention to what? 1, according to the needs of the cable connector model specifications to choose the appropriate connector material, now the cable connector material quality is uneven, but in order to ensure the quality of the cable connector, it is recommended not to covet cheap, it is best to choose the quality of the cable connector manufacturer's material. 2. It is best not to choose rainy days when the cable is connected, because water entering the cable will seriously affect the use of the cable.
2017-04-25
Method for preventing oxidation of general purpose rubber sheathed cable conductors
General rubber cable is 5 types of copper conductor as the conductive core, in its production process, often found that the copper conductor oxidation discoloration, which seriously affected the quality of the product, has become a domestic many cable manufacturers a long-term technical problems. Copper is a transition metal and is easily oxidized by oxygen in the air under acidic conditions to black CuO. When there is a water film or water droplets on the surface of the copper conductor, because the atmosphere contains a lot of dust, such as smoke, coal, automobile exhaust, chloride and other acid, alkali, salt particle dust, etc., these harmful substances are dissolved in the water film or water droplets, You can form an electrolyte, thereby increasing the oxygen of the copper conductor
What are the advantages of environmentally friendly cables compared to other traditional cables
Compared with other traditional cables, environmentally friendly cables have the following advantages over ordinary cables: the first is to have a high flame retardancy, we all know that the flame retardant performance of the cable is very important, fully ensure the safety and fire protection requirements of the cable, the cable is not easy to burn fire, and can prevent the expansion of the flame. The second is halogen-free, green insulation, special oxygen barrier materials, not only has good electrical properties, mechanical properties, and to ensure that the product does not contain halogen, to prevent the formation of traditional PVC wire combustion in the combustion process of carcinogenic dioxin class
Introduction and Selection of Photovoltaic Cable
1. to the relevant standards and specifications related to cable selection 1,DL/T5044-2004 the People's Republic of China to the power industry standard when multi-core cable is selected, its allowable current carrying capacity can be calculated according to the numerical value of single-core cable with the same section. The control line and signal line drawn from the DC cabinet shall be copper core cable. The voltage drop shall not be greater than 5% of the nominal voltage of the DC system. The selection and laying of DC cables shall comply with the relevant provisions of the GB50217. 2. GB50217 Power Engineering Cable Design Code Two-core cables should be used for DC power supply circuits, and single-core cables can be used when needed. high temperature (above 100 ℃) or low temperature (-
Treatment method of cross-linked polyethylene power cable affected with moisture
In urban power grid reconstruction projects, cables, especially polyethylene insulated power cables, have been widely used. However, due to the particularity of the cable, the installation, operation and maintenance of the cable have special requirements. Cable moisture or water to reduce the cable insulation resistance, is caused by the operation of the cable line accident occurred in several important aspects. Causes and hazards of moisture and water ingress of cables (1) when the new whole cable is delivered from the factory, both ends are sealed with plastic sealing sleeves, but after a period of use according to the actual situation at the construction site, the rest is simply wrapped with plastic cloth to wrap the fracture, because it is usually placed in the open air and sealed
High temperature wire and cable exports need to pay attention to five aspects
At present, many domestic high-temperature wire and cable companies have entered the foreign market, but compared with foreign local products, the competitiveness of my country's high-temperature wire and cable products needs to be improved, especially some companies do not understand foreign industry standards and act rashly, resulting in the development of enterprises. In an embarrassing situation. As a well-known brand in the high-temperature wire and cable industry, Chuncao has achieved certain results in foreign markets. Here are five aspects that need to be paid attention to when exporting high-temperature wires and cables. 1. technical standards: foreign high-temperature wires and cables generally require advanced standards such as IEC or British standards and American standards, so it is not enough to be familiar with domestic standards.
The difference between environmental protection cable and low smoke halogen free cable
Low-smoke halogen-free cables are used in many places in key projects, such as fire fighting, monitoring and alarm. People usually call them environmental protection cables. In fact, environmental protection cables do not refer to low-smoke halogen-free cables. The following is a detailed analysis of the differences between environmental protection cables and low-smoke halogen-free cables: 1. Halogen-free: green environmental protection insulation layers, sheaths and special oxygen barrier materials are adopted, it not only has good electrical properties, physical and mechanical properties, but also ensures that the product does not contain halogen, solves the "secondary pollution" formed when it is burned, and avoids the "dioxin" substance that can cause cancer when the traditional PVC wire is burned.
Discuss the causes of common problems in high-voltage cables
The cable is the bridge between the power supply equipment and the electrical equipment, which plays the role of transmitting electric energy. Widely used, so failures often occur, the following brief analysis of the causes of common problems of YJV high-voltage cable, according to the causes of failure classification is roughly divided into the following categories: manufacturers manufacturing reasons, construction quality reasons, design unit design reasons, external damage four categories. The cable is the bridge between the power supply equipment and the electrical equipment, which plays the role of transmitting electric energy. It is widely used, so faults often occur. The following brief analysis of the causes of common problems of YJV high-voltage cables is carried out according to the causes of faults.
At present, many domestic high-temperature wire and cable companies have entered the foreign market, but compared with foreign local products, the competitiveness of my country's high-temperature wire and cable products needs to be improved, especially some companies do not understand foreign industry standards and act rashly, resulting in the development of enterprises. In an embarrassing situation. As a well-known brand in the high-temperature wire and cable industry, Chuncao has achieved certain results in foreign markets. Here are five aspects that need to be paid attention to when exporting high-temperature wires and cables. 1. technical standards: foreign high-temperature wires and cables generally require IEC or British standards, American standards and other advanced standards, so only familiar with domestic standards are
Cable market to copper-based, short-term adjustment after the market bullish unchanged.
Copper core cable power cable market occupies a dominant position, why there is a final conclusion, but the industry has shaken in recent years? In fact, copper core cable has been occupying the main body of the market, this is mainly because: First, the use of imported copper resources to produce copper cables, safe and reliable, convenient construction, low maintenance costs, even if the price is relatively high, but more able to win the favor of the power sector. Second, from the perspective of safety and reliability, the key to the use of aluminum core cable is the joint technology and its reliability, China's power cable construction technology and maintenance management level can not ensure the safe and reliable operation of aluminum cable. Third, due to the city, especially large urban underground laying space
2017-04-01