Cable companies, especially located in the town of wire and cable companies should first define three questions: First, focus on product quality. Rural power grid construction project intends to corner the market touch the cable manufacturers, to completely abandon "third-class products agriculture" wrong understanding, must not always think that the quality of rural power cables less demanding and shoddy products. You know, rural power grid Principal events involving thousands of families of the WISDOM HDMI CABLE rural electrical safety, must not be taken lightly. According to reports, in the countryside due to the wire and cable products and power quality problems and livestock dead things common.
Second is the choice of product variety. Rural power cable products used in construction, with respect to the city grid, it is a simple number of popular products such as the small size of the bare overhead conductors, aerial bundled conductors, small cross-section low voltage insulated cables, underground cables and other agricultural land. Enterprises can choose according to their focus to deal with the product. However, for rural water conservancy and hydropower construction projects cables used in the WISDOM RAC CABLE technical performance requirements are relatively high, should be strictly in accordance with the standards.
The third is to uphold quality and price level. Since the rural network cable is not very high technical performance, and given the rural power grid construction project funding considerations, cable prices will not, can not be very high. Cable manufacturers should enterprises should strengthen internal management, and strive to reduce product costs and improve price competitiveness, given the price competition by cutting corners practice is immoral.
In the new round of rural power grid construction projects, especially in the local rural power cable products provide WISDOM utp cable local cable companies, should love their hometown, and effectively pay attention to product quality, to build a safe and reliable power output hometown. "Twelve Five" period, the national network of successful companies will drill to 220 kV voltage level as part of the core in the heart, strong and 110 kV voltage level based farm grid frame network. County medium voltage distribution network successfully ring-powered drill, and further optimize network structure, reducing supply radius. Reliable power supply, voltage standard rates further growth.
vga cable
2014年1月17日星期五
Pluggable Terminal application advantages of the seven gold
Terminals in the electrical and wiring systems applications have years of experience, technology has matured. Pluggable terminal block series is used to achieve electrical connection. For the advantages of plug-in terminal block wiring scheme is commissioning fast, do not go wrong. If the debug operation, as has been connected to the potential WISDOM Terminal BLOCK equalization cable, is relatively time-consuming, but also error-prone. Today, talk about the advantages of pluggable terminals: Terminal 1 large capacity, can be adapted to a variety of wiring requirements. 2 Clamp and Solder pin mechanical decoupling, namely due to the clamp frame and solder pin is not connected as a whole, the torque when tightening the screws will not spread to the joints.
3 Solder pin four-angled, tapering the ends of contraction. When inserting the welding hole, increasing the WISDOM Network Cabinet contact area. Easy integration into the liquid weld welding holes, easy Weld.
4 Solder pin copper alloy, solder pin no dirt to ensure long-term reliability of welding.
5 tin solder pin, easy to weld.
6 with cooling channels.
7 Solder pin ends contraction thinner, easy to install.
Pluggable Terminal Blocks series uses easy-pluggable connection and secure ways of combining universal screw, making all kinds of parts for easy connection.
Plug the terminal through the innovative series of terminals, for the first time in the design of the application are available at plug grounding system. Without the use of proprietary tools, will be able to connect the wires to the axial screw terminal. If using a simple screwdriver, connect faster, simple, and secure. Use additional locking components to ensure the terminal tightly to prevent accidental cracking.
3 Solder pin four-angled, tapering the ends of contraction. When inserting the welding hole, increasing the WISDOM Network Cabinet contact area. Easy integration into the liquid weld welding holes, easy Weld.
4 Solder pin copper alloy, solder pin no dirt to ensure long-term reliability of welding.
5 tin solder pin, easy to weld.
6 with cooling channels.
7 Solder pin ends contraction thinner, easy to install.
Pluggable Terminal Blocks series uses easy-pluggable connection and secure ways of combining universal screw, making all kinds of parts for easy connection.
Plug the terminal through the innovative series of terminals, for the first time in the design of the application are available at plug grounding system. Without the use of proprietary tools, will be able to connect the wires to the axial screw terminal. If using a simple screwdriver, connect faster, simple, and secure. Use additional locking components to ensure the terminal tightly to prevent accidental cracking.
2014年1月14日星期二
Gas pipeline installation of some of the uses of new technologies
In the era of widespread use of gas for cooking , cast iron pipe is the most popular underground pipeline gas pipe . It consists of gray cast iron , corrosion resistance and long service life . But in the production process , the metal consumed in large quantities , the density is also large, in the construction of the installation is very inconvenient to haul , coupled with its crisp, easy to break, soon to be replaced by welded steel pipe. But there are welded steel pipe joints , whether or spiral steel welded pipe , steel quality and the quality of welds require good control . Seamless Steel is known for its high strength, good toughness, impact resistance, and good VGA CABLE tight occupy the market has many advantages . But two years ago , polyethylene pipe in the domestic market began to spread , in addition to its more than metal pipes with strong corrosion resistance than the smaller density , ease of handling and installation , but also the main reason for its current market occupied .
2.PE valves instead of steel valves
We open the gas valve well , often see some of the well water valve . Even valve well be repainted both inside and outside , then add impermeable agents , it is difficult to prevent moisture moisture continues to rust on steel valves . Over time, the valve switches are very laborious and sealing effect will be weakened. If you are using PE valve , the valve shaft greatly reduce corrosion . In some coastal cities , PE valve well have been put into use, but not yet universal .
If the use of PE pipe is buried gas pipes a significant advance , there will be realized PE valve PE of all underground pipes , no longer have to worry about stray currents and soil gas flow in the pipeline caused by pipeline water hammer erosion.
. Trenchless technology start 3
Trenchless Technology has more than 100 years of history, but in our country it is only in its infancy. Application of trenchless technology, can effectively reduce the manual labor intensity , difficult excavation of some of the lots also have a new breakthrough method . In some important sections , both to ensure the timely construction of the gas , and not blocking traffic , laying of overhead pipes are difficult rivers can be used trenchless construction . There are some common interests and residential owners to obstruct construction , strong cable compensation , then, trenchless technology and can be a good solution to this problem.
4 pipe corrosion epoxy powder coating
For outdoor overhead pipes , gas pipes within pipes overhead bridge or gate stations , mostly seamless steel pipe, but only in accordance with regulatory requirements brush primer, rust , paint , but less than six months , we find , paint has come off , rusted steel surface has begun to emerge , so we need repainting every six months , so that Displayport CABLE trouble , and secondly, does not really play a preservative .
Disposable construction process large multi- epoxy powder coating steel pipe pile corrosion engineering , let us real insight into the beautiful but good effect preservative preservative technology. In the sea, through the strengthening of multi- level spray pipe service life of up to 100 years. So, from the early to the recent asphalt corrosion corrosion tape wrapped around the many anti-corrosion technology , the people most at ease without affecting the epoxy powder coating undoubtedly beautiful , but expensive, so use very little , generally only in the past overhead valve tube wells or steel bridge corrosion of exposed place .
2.PE valves instead of steel valves
We open the gas valve well , often see some of the well water valve . Even valve well be repainted both inside and outside , then add impermeable agents , it is difficult to prevent moisture moisture continues to rust on steel valves . Over time, the valve switches are very laborious and sealing effect will be weakened. If you are using PE valve , the valve shaft greatly reduce corrosion . In some coastal cities , PE valve well have been put into use, but not yet universal .
If the use of PE pipe is buried gas pipes a significant advance , there will be realized PE valve PE of all underground pipes , no longer have to worry about stray currents and soil gas flow in the pipeline caused by pipeline water hammer erosion.
. Trenchless technology start 3
Trenchless Technology has more than 100 years of history, but in our country it is only in its infancy. Application of trenchless technology, can effectively reduce the manual labor intensity , difficult excavation of some of the lots also have a new breakthrough method . In some important sections , both to ensure the timely construction of the gas , and not blocking traffic , laying of overhead pipes are difficult rivers can be used trenchless construction . There are some common interests and residential owners to obstruct construction , strong cable compensation , then, trenchless technology and can be a good solution to this problem.
4 pipe corrosion epoxy powder coating
For outdoor overhead pipes , gas pipes within pipes overhead bridge or gate stations , mostly seamless steel pipe, but only in accordance with regulatory requirements brush primer, rust , paint , but less than six months , we find , paint has come off , rusted steel surface has begun to emerge , so we need repainting every six months , so that Displayport CABLE trouble , and secondly, does not really play a preservative .
Disposable construction process large multi- epoxy powder coating steel pipe pile corrosion engineering , let us real insight into the beautiful but good effect preservative preservative technology. In the sea, through the strengthening of multi- level spray pipe service life of up to 100 years. So, from the early to the recent asphalt corrosion corrosion tape wrapped around the many anti-corrosion technology , the people most at ease without affecting the epoxy powder coating undoubtedly beautiful , but expensive, so use very little , generally only in the past overhead valve tube wells or steel bridge corrosion of exposed place .
2014年1月9日星期四
Cable connector Failure Analysis
Due to the different cable connectors operating conditions , technical level and quality of construction workers is uneven , because cable accessories , cable connectors resulting in failure also varies .
The cable joint production process.
Poor connector contact surface treatment . As the production or storage conditions , and thus the terminals or impurities , the presence of burrs , and the inner wall oxide layer of the Terminal BLOCK connecting tube . It is not important to the defect , but seriously affect the quality of the connection wires . Production of alumina membranes and insulation materials , especially the hard layer is aluminum surface easily , aluminum conductors than copper wires strictly high-tech .
Damaged wires. Insulation strength of a larger , peel cut difficulties. Construction workers circumcision electrician knife left- right cut , sometimes simply mark the depth of cut with a hacksaw ring , often not good wire damage.
Wire in place . Conductor connection cut insulation stripping length requirements crimp connector hole depth , hole depth 5mm, but non-standard products , making it easy enough to peel or cut the ends curled length bit string line to form a gap , the wall thickness of the conductive gold alone , resulting in increased contact resistance large heat generation .
Pressure is not enough .
Today, only refer to the number of the information pit in the production process of the cable connection at each end of a standard connection diagram , but no detailed description of the area and depth of curl curled , the number of pits and pressure sufficient to meet the construction workers , but can not determine how efficient . The following reasons cause enough pressure wire connector :
Insufficient pressure curl machine . Crimping machine manufacturing plant , but there is no uniform standard, after some mechanical pressing and curling tongs narrow pit in place , the upper die and a lower die disagreed and enforcement of foreign and domestic standards , do not meet the wire section .
Connection assembly space . Most cable terminal connector for connecting cable production equipment or greaseproof paper fan wires and pressure pipes . Circulating fan wire core theory is the same as the effective cross-section , but the actual operation shows that curl effect is very different . Conductor of the cable is a round wire twisted core deposits a large common space , the pressure contact force is not enough compression . The contact resistance is inversely proportional to the applied pressure , resulting in increased resistance. One important reason is that the connector portion of the cable connector fever. On the composition of the structure of cable products
The vast majority of the section ( segment ) is identical with the shape of wire and cable ( manufacturing error is ignored ) , the elongated product , it is because as the system or apparatus using a wire or coil characteristics. Therefore, the analysis of the structure of the cable product composition , it is only observed from the cross -sectional analysis .
Structural elements of wire and cable products , and can be divided into the protective layer wire , insulation , shielding, and the four main structural elements , fillers and tensile Network Cabinet components. According to the needs and applications , some products such as simple structure, only the structure of a line , such as bare overhead line , the line of contact of the copper and aluminum bus ( bus ) ; abroad these products rely on the electrically insulating insulator and spatial distance installation ( i.e., the use of air insulation ) . Ensure .
Line 1 is the basic ingredient of the product of the main current or electromagnetic transmission of information . Conductive core wire is conductive properties of copper , aluminum and other nonferrous metals outstanding . In optical communications fiber optic network over the past three decades of rapid development, optical fiber as a conductor .
2 insulation layer coated on the external electrical insulated wire components. Ensure that the transmission of electromagnetic waves or current , and the light does not flow out along the wire , the potential of the conductor ( i.e., around the object , i.e., a potential of the voltage ) can be separated , both to ensure the normal transmission line , and the safety of sponsorships and other objects . And an insulating layer is formed of a conductor cable products ( except the bare wire) must have two basic components .
3 When the protective layer , wire and cable products are installed in different environments , the product must be whole , especially for members of the protective effect of the insulation layer , the protective layer .
As the insulating material has excellent electrical insulation performance requirements , must require a very high purity , impurity content of the material ; often do not consider the external protection , so the outside world ( ie , installation , use, and use a variety of mechanical force ) bear or resistance , resistance to atmospheric , chemical resistance or oil to prevent the invasion of alien species , reducing the fire hazard and must be borne by the various protective layer structures.
Committed many good external environment ( such as clean , dry, without external mechanical forces indoor ) cable products , or an insulating layer material itself has a certain mechanical strength , weather resistance of the product , the shield member can not .
The cable joint production process.
Poor connector contact surface treatment . As the production or storage conditions , and thus the terminals or impurities , the presence of burrs , and the inner wall oxide layer of the Terminal BLOCK connecting tube . It is not important to the defect , but seriously affect the quality of the connection wires . Production of alumina membranes and insulation materials , especially the hard layer is aluminum surface easily , aluminum conductors than copper wires strictly high-tech .
Damaged wires. Insulation strength of a larger , peel cut difficulties. Construction workers circumcision electrician knife left- right cut , sometimes simply mark the depth of cut with a hacksaw ring , often not good wire damage.
Wire in place . Conductor connection cut insulation stripping length requirements crimp connector hole depth , hole depth 5mm, but non-standard products , making it easy enough to peel or cut the ends curled length bit string line to form a gap , the wall thickness of the conductive gold alone , resulting in increased contact resistance large heat generation .
Pressure is not enough .
Today, only refer to the number of the information pit in the production process of the cable connection at each end of a standard connection diagram , but no detailed description of the area and depth of curl curled , the number of pits and pressure sufficient to meet the construction workers , but can not determine how efficient . The following reasons cause enough pressure wire connector :
Insufficient pressure curl machine . Crimping machine manufacturing plant , but there is no uniform standard, after some mechanical pressing and curling tongs narrow pit in place , the upper die and a lower die disagreed and enforcement of foreign and domestic standards , do not meet the wire section .
Connection assembly space . Most cable terminal connector for connecting cable production equipment or greaseproof paper fan wires and pressure pipes . Circulating fan wire core theory is the same as the effective cross-section , but the actual operation shows that curl effect is very different . Conductor of the cable is a round wire twisted core deposits a large common space , the pressure contact force is not enough compression . The contact resistance is inversely proportional to the applied pressure , resulting in increased resistance. One important reason is that the connector portion of the cable connector fever. On the composition of the structure of cable products
The vast majority of the section ( segment ) is identical with the shape of wire and cable ( manufacturing error is ignored ) , the elongated product , it is because as the system or apparatus using a wire or coil characteristics. Therefore, the analysis of the structure of the cable product composition , it is only observed from the cross -sectional analysis .
Structural elements of wire and cable products , and can be divided into the protective layer wire , insulation , shielding, and the four main structural elements , fillers and tensile Network Cabinet components. According to the needs and applications , some products such as simple structure, only the structure of a line , such as bare overhead line , the line of contact of the copper and aluminum bus ( bus ) ; abroad these products rely on the electrically insulating insulator and spatial distance installation ( i.e., the use of air insulation ) . Ensure .
Line 1 is the basic ingredient of the product of the main current or electromagnetic transmission of information . Conductive core wire is conductive properties of copper , aluminum and other nonferrous metals outstanding . In optical communications fiber optic network over the past three decades of rapid development, optical fiber as a conductor .
2 insulation layer coated on the external electrical insulated wire components. Ensure that the transmission of electromagnetic waves or current , and the light does not flow out along the wire , the potential of the conductor ( i.e., around the object , i.e., a potential of the voltage ) can be separated , both to ensure the normal transmission line , and the safety of sponsorships and other objects . And an insulating layer is formed of a conductor cable products ( except the bare wire) must have two basic components .
3 When the protective layer , wire and cable products are installed in different environments , the product must be whole , especially for members of the protective effect of the insulation layer , the protective layer .
As the insulating material has excellent electrical insulation performance requirements , must require a very high purity , impurity content of the material ; often do not consider the external protection , so the outside world ( ie , installation , use, and use a variety of mechanical force ) bear or resistance , resistance to atmospheric , chemical resistance or oil to prevent the invasion of alien species , reducing the fire hazard and must be borne by the various protective layer structures.
Committed many good external environment ( such as clean , dry, without external mechanical forces indoor ) cable products , or an insulating layer material itself has a certain mechanical strength , weather resistance of the product , the shield member can not .
2014年1月8日星期三
The main factors affecting the resistance of the cable insulation
Wire and cable products for the insulation resistance of the cable insulation is mainly measured volume resistivity , surface resistivity measurements are not , and factors affecting the high-voltage cable insulation resistance value more, in practice there are four main factors greater impact on the insulation resistance coefficient . Temperature of the temperature rise , the insulation resistance coefficient decreased , which is due hdmi wall plate to increased thermal motion , and the migration of ions produced has increased , the role of the voltage , the conduction current is formed by the ion motion is increased, and thus the insulation resistance drops . Theory and practice show that the insulation resistance coefficient decreased exponentially with increasing temperature type, and then while pressing the conductance increases exponentially with increasing temperature .
Electric field strength across the power cable when the electric field intensity in a range of relatively low mobility of ions increases with increasing electric field strength , is proportional to the ion current and the electric field strength obey Ohm's law , when the electric field intensity is relatively high, ion mobility increases with increasing electric field strength and the linear trend of gradually becomes exponential relationship , the breakdown will occur when approaching a large electron mobility , then the coefficient of the insulation resistance is greatly reduced . Withstand test voltage specified in the standard variety of wire and cable products for the mobility of ions in an electric field intensity increases in proportion with the stage , so the impact of the electric field strength of the insulation resistance coefficient reflects not come out , when do puncture test specimen samples , the influence of the electric resistivity of the insulation obviously reflected in the film due to the small conductance humidity large, and the size of the water molecule much smaller than the polymer molecules, macromolecules and polymers in the composition under heat link relative movement of water into the polymer molecules within easy , increasing the inner ion conductive polymer , leaving the insulation resistance drops . Standard provides a variety of water immersion test wire and cable , such as rubber specimen measuring insulation resistance before soaking for 24 hours, because its purpose is to be Terminal BLOCK encountered in the use of water on the influence of moisture and electrical performance . Insulation resistance is one of the main electrical performance insulation materials, wire and cable is an important indicator of a product or material , generally require insulation resistance of not less than a certain value. If the insulation resistance value is too low, the line along the wire cable must increase the leakage current , resulting in waste of energy , and electrical energy into heat energy , the thermal breakdown preparation conditions , increase the possibility of thermal breakdown . DC cable insulation , you can also make use of the material composition of the different phases resistivity insulation to improve material utilization , improve the surface resistivity of the cable insulation is also very important , when the surface dirt and moisture , because of its distribution is not uniform, so that part of the surface may be exposed to high voltages, which leads to partial discharge or creeping discharge aluminum cable , causing catastrophic failure , but may also reduce the surface resistance of artificial means , such as a conductive core of the cable , because the surface is not completely smooth uneven distribution of the electric field causes the electric field strength will be higher corona discharge wire in the conductive rubber core coated with a conductive or semi- conductive the surface of the plastic core is reduced to eliminate the corona field intensity , and, according to the insulation material coefficient of variation of the resistance to determine the degree of moisture of the material. Mixed material impurities affect the purity of the material , increasing the material conductive particles , the insulation resistance drops , so some kind of rubber and plastic materials will reflect the size of the insulation resistance of the material purity level , to verify their compliance with standards, wire and cable in the production process , the process is not strictly abide by the rules , mixing impurities, moisture and foaming material , insulation or partial core diameter size smaller than standard insulation delamination or cracks , scratches and other insulation will make products, insulation resistance decreases, so check the insulation resistance be sure to check whether there is a problem in the process of process operation , in the course of the wire and cable , measure the insulation resistance changes can also check the insulation damage , prevention of accidents.
Electric field strength across the power cable when the electric field intensity in a range of relatively low mobility of ions increases with increasing electric field strength , is proportional to the ion current and the electric field strength obey Ohm's law , when the electric field intensity is relatively high, ion mobility increases with increasing electric field strength and the linear trend of gradually becomes exponential relationship , the breakdown will occur when approaching a large electron mobility , then the coefficient of the insulation resistance is greatly reduced . Withstand test voltage specified in the standard variety of wire and cable products for the mobility of ions in an electric field intensity increases in proportion with the stage , so the impact of the electric field strength of the insulation resistance coefficient reflects not come out , when do puncture test specimen samples , the influence of the electric resistivity of the insulation obviously reflected in the film due to the small conductance humidity large, and the size of the water molecule much smaller than the polymer molecules, macromolecules and polymers in the composition under heat link relative movement of water into the polymer molecules within easy , increasing the inner ion conductive polymer , leaving the insulation resistance drops . Standard provides a variety of water immersion test wire and cable , such as rubber specimen measuring insulation resistance before soaking for 24 hours, because its purpose is to be Terminal BLOCK encountered in the use of water on the influence of moisture and electrical performance . Insulation resistance is one of the main electrical performance insulation materials, wire and cable is an important indicator of a product or material , generally require insulation resistance of not less than a certain value. If the insulation resistance value is too low, the line along the wire cable must increase the leakage current , resulting in waste of energy , and electrical energy into heat energy , the thermal breakdown preparation conditions , increase the possibility of thermal breakdown . DC cable insulation , you can also make use of the material composition of the different phases resistivity insulation to improve material utilization , improve the surface resistivity of the cable insulation is also very important , when the surface dirt and moisture , because of its distribution is not uniform, so that part of the surface may be exposed to high voltages, which leads to partial discharge or creeping discharge aluminum cable , causing catastrophic failure , but may also reduce the surface resistance of artificial means , such as a conductive core of the cable , because the surface is not completely smooth uneven distribution of the electric field causes the electric field strength will be higher corona discharge wire in the conductive rubber core coated with a conductive or semi- conductive the surface of the plastic core is reduced to eliminate the corona field intensity , and, according to the insulation material coefficient of variation of the resistance to determine the degree of moisture of the material. Mixed material impurities affect the purity of the material , increasing the material conductive particles , the insulation resistance drops , so some kind of rubber and plastic materials will reflect the size of the insulation resistance of the material purity level , to verify their compliance with standards, wire and cable in the production process , the process is not strictly abide by the rules , mixing impurities, moisture and foaming material , insulation or partial core diameter size smaller than standard insulation delamination or cracks , scratches and other insulation will make products, insulation resistance decreases, so check the insulation resistance be sure to check whether there is a problem in the process of process operation , in the course of the wire and cable , measure the insulation resistance changes can also check the insulation damage , prevention of accidents.
2014年1月6日星期一
Alloy Alloy Cable Cable Product Features
Materials and annealing process of the aluminum alloy conductor creep resistance alloy reduce the " creep " in the heat conductor and the tendency of pressure with respect to aluminum, the creep resistance by 300 %, to avoid the cold flow or creep due problems caused by relaxation . Tensile strength and elongation compared to the aluminum conductor aluminum conductor , due to join the special ingredients and the use of special processing technology , which greatly improves the tensile strength and elongation rate increased to 30% , the use of safer reliable. Thermal expansion coefficient Network Cabinet Thermal expansion coefficient of variation is used to calculate the size of the material when the temperature changes . Copper-aluminum alloy with a thermal expansion coefficient equivalent years been reliably aluminum connector for copper and aluminum conductors , and most of the electrical connector in use today are made of aluminum , which is particularly suitable for aluminum alloys. Therefore, the aluminum alloy conductor is connected exactly with the expansion and contraction. Electrical connection with the performance of aluminum alloy with copper conductors connected with the manufacture of the same security and stability. Aluminum components significantly improve the performance of their connection , when the conductor annealing , add iron to produce high strength creep resistance , even in the long overload and overheating , but also to ensure that the connection is stable. Weight bearing capacity of high strength aluminum alloy improves the tensile strength of aluminum , aluminum cable can support the weight of 4000 m length of copper cable can only support 2,750 meters . This advantage in large -span buildings ( such as sports stadiums ) wiring reflected particularly prominent. Anti-corrosion layer of aluminum oxide thin sturdy inherent corrosion resistance when the edge is formed from the aluminum surface in contact with the air , the oxide layer is especially tolerant of various forms of corrosion . And alloys of rare earth elements can be added to further improve the corrosion resistance of aluminum alloys , in particular electrochemical etching . Features aluminum can withstand the harsh environment so as to be widely used in conductor cable tray , and many industrial components and containers. Usually associated with the generation of corrosion of dissimilar metals connected in a humid environment is related to the use of appropriate protective measures to prevent the occurrence of corrosion , such as the use of lubricants , antioxidants and protective coatings . Acidic soil environment and certain types of alkaline soils have more corrosive to aluminum , so direct burial aluminum conductor insulation should be used to prevent corrosion or molded sheath . Sulfur-containing environments, such as railway tunnels and the like where the corrosion resistance of the aluminum alloy can be significantly better than copper. Flexible aluminum alloy VGA CABLE has good bending properties , its unique alloy formula , processing technology, greatly improved flexibility . 30% higher than copper, aluminum flexibility, rebound 40% lower than copper. Usually copper bending radius of 10 to 20 times the outside diameter , and the aluminum cable bend radius is only 7 times the outside diameter , terminal easier . Common characteristics of domestic armored armored cable , they use steel tape armored , low security level , when subjected to external destructive , their resilience is poor, prone to breakdown , and the heavy weight , the installation cost is quite high , coupled with corrosion-resistant performance is poor, life is not long . And we developed according to the American standard metal chain armored cables , aluminum is used with a chain armor , chain structure between its layers , to ensure that the cable can withstand strong external destructive , even if subjected to greater pressure cable and impact , the cable nor easily breakdown, improved safety performance. While the structure of the cable armor and the outside world, even in case of fire , armored cable increases the level of fire retardant reduces fire risk coefficient . Armored aluminum structure with respect to the steel tape armored , its light weight , convenient laying , bridge -free installation , can be reduced by 20 % to 40 % of the installation costs. According to different places you can choose different outer jacket layer, so that the use of armored cable is more extensive. Pressed from a single volume conductivity characteristics considerations, aluminum is less than copper , but we have developed not only made from conductive material performance improvements , and in the process has also made a major breakthrough , we use unconventional pressed technology, pressed coefficient of 0.93 , while squeezing coefficient shaped line can reach 0.95 , first of its kind in the country . By squeezing the maximum limit , you can make up for deficiencies in the bulk conductivity of aluminum alloy , so truthfully stranded conductor wire core center conductor in general, significantly reduced core diameter, to improve conductivity, in the case of equal ampacity conductor outside Drive only 10% larger than the copper .
2014年1月3日星期五
Cable -site repair should be noted that the problem
In the process of laying the cable in the field phenomenon scratching the surface of the cable jacket damage is widespread , the damage is only minor injuries to the jacket , how to ensure the quality of repair and repair time is short, but also ensures the quality of the cable is increasingly becoming consumer were common concerns . And investment is small, the scene in harsh conditions and easy to achieve , and therefore the quality of on-site repair techniques and sheath becoming user concerns .
Site construction of the cable is generally more severe conditions , may be located in the initial construction of Mini HDMI cable power plants, may also be located initially is building new railway field , may be on the bridge , possibly in the cable tunnel , because the wild patch cable sheath of plastic are used carry the torch , and the need for heating the plastic gun 220V AC , while in the emerging field engineering construction site generally lack the power or a power position may be due to the laying of the cable immediately of the site , to provide power to bring a certain difficult, so to achieve the repair of the cable sheath , one person is in place , the other main power provided only possible basis for these two preparatory work in order to achieve the normal development of the cable sheath and repair work carried out .
In order to facilitate the smooth progress of the cable guard field repair work , construction units should have a field with a small generator . At the same time the quality of on-site repair is now offering the convenience of plastic gun to perfect. Nozzle heating area VGA CABLE should be large, and faster heating . And cable pay- damaged parts of the process is random , in general, cities and plains , to carry out this work better , but in some mountainous areas , due to the receipt of the impact of complex terrain , cable repair work is actually very difficult . Therefore, to reduce the corresponding aspects of investment and solve problems quickly , a very critical issue is equipped with a number of cable laying process must be sufficient personnel , and the use of regular cable laying equipment for regular professional actinomycetes , avoid and reduce cable line occurred during the sheath breakage phenomenon.
On-site repair need, not high technology cables , cable laying and construction units, after cable breakage , be sure to confirm the internal cables under the premise of no damage , and then repair to the cable , otherwise the cable sheath repair the actual meaningful. Patch cables must be timely , or over time external moisture and moisture from entering , it will affect the life of the cable being produced . In the southern end of the rainy weather in the laying of the cable end of the cable ends are sealed because no timely treatment, resulting in water flowing into the cable into the cable trench ranging from 10-20 meters decapitated , stripped ends of insulated conductors are found have all black , resulting in a waste of the laying of the cable , so for the laying of cables or complete the appropriate areas to strengthen the inspection , maintenance and storage, to prevent the cable energized before using a variety of external factors should live life shorter cable and termination .
Site construction of the cable is generally more severe conditions , may be located in the initial construction of Mini HDMI cable power plants, may also be located initially is building new railway field , may be on the bridge , possibly in the cable tunnel , because the wild patch cable sheath of plastic are used carry the torch , and the need for heating the plastic gun 220V AC , while in the emerging field engineering construction site generally lack the power or a power position may be due to the laying of the cable immediately of the site , to provide power to bring a certain difficult, so to achieve the repair of the cable sheath , one person is in place , the other main power provided only possible basis for these two preparatory work in order to achieve the normal development of the cable sheath and repair work carried out .
In order to facilitate the smooth progress of the cable guard field repair work , construction units should have a field with a small generator . At the same time the quality of on-site repair is now offering the convenience of plastic gun to perfect. Nozzle heating area VGA CABLE should be large, and faster heating . And cable pay- damaged parts of the process is random , in general, cities and plains , to carry out this work better , but in some mountainous areas , due to the receipt of the impact of complex terrain , cable repair work is actually very difficult . Therefore, to reduce the corresponding aspects of investment and solve problems quickly , a very critical issue is equipped with a number of cable laying process must be sufficient personnel , and the use of regular cable laying equipment for regular professional actinomycetes , avoid and reduce cable line occurred during the sheath breakage phenomenon.
On-site repair need, not high technology cables , cable laying and construction units, after cable breakage , be sure to confirm the internal cables under the premise of no damage , and then repair to the cable , otherwise the cable sheath repair the actual meaningful. Patch cables must be timely , or over time external moisture and moisture from entering , it will affect the life of the cable being produced . In the southern end of the rainy weather in the laying of the cable end of the cable ends are sealed because no timely treatment, resulting in water flowing into the cable into the cable trench ranging from 10-20 meters decapitated , stripped ends of insulated conductors are found have all black , resulting in a waste of the laying of the cable , so for the laying of cables or complete the appropriate areas to strengthen the inspection , maintenance and storage, to prevent the cable energized before using a variety of external factors should live life shorter cable and termination .
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