Aluminum alloy cable must use aluminum alloy special terminal's five main reasons

( Industry news] Aluminum alloy cable must use aluminum alloy special terminal five reasons zhdljyw P a line speed km/h train hurtling in modern high-speed railway track, suddenly appeared in front of the period of the last century s tracks, the train, please? The answer is obvious, the most advanced means of transport, if there is no orbit with the most advanced equipment, not only can not play its advantage and value, still can cause significant security problems. In the same way in the aluminum alloy cable applications, aluminum alloy cable originated in North America, with its excellent electrical properties, mechanical properties, and economy is widely used to national economy each domain, the successful application of aluminum alloy cable in North America are inseparable and matching connector. Years, with the relevant wire and cable companies in the United States and other electrical products laboratory and connector company industry enterprise, established to reassess aluminum and aluminum alloy conductor. Electrical laboratory, the evaluation test of aluminum alloy conductor cable, connector company to make the aluminum core cable dedicated the new connector. After strict screening of the aluminum core cable, the wire and cable companies in the United States eventually adopted a series of aluminum alloy, and began to use power cable used in the manufacture of construction and other fields. Among them, the most used is AA aluminum alloy. Also stipulated in the national standard associated cable manufacturing must adopt new alloy AA series electrical grade aluminum alloy material. To cooperate and support, connectors, wire and cable manufacturer company and electrical laboratory, actively carry out the applicable to AA series aluminum alloy conductor connector technology research and development work, connector technology breakthrough, connector products with aluminum alloy cable is widely used. Alloy cable used in the United States, from the product technical invention to complementary connector technology and the improvement of the product, it took just two years. The progress of the application of aluminium and aluminium alloy conductor cable in our country has a great gap compared with the United States. In China's wire and cable products research and development, the development of wire and cable hardware installation, always lags behind that of the electric wire electric cable itself development progress. For example, as a result of the overhead insulated cable erection hardware backward, seriously hindered the overhead insulated promotion and exports. Export of overhead insulated cable is most countries in the world is Finland, they are all with erection hardware export. This phenomenon, still exist. Now the development of aluminum alloy cable, there is also supporting hardware ( Connection accessories products) Technology lags behind the big problem. This restricted the application of aluminum alloy cable. Wrong connection scheme is the current domestic aluminum alloy cable in aluminum alloy cable connection with the use of the original used in aluminium cable copper aluminum terminal and connector and do not agree with cable performance of aluminum alloy as a link. This link will remain safe hidden trouble, make the advantage of aluminum alloy cable and value, application of aluminum alloy cable will be no advantage and value. Aluminum alloy cable must use aluminum alloy special terminal five reasons: the first big reason: copper and aluminum transition terminal because of the existence of terminal chinalco, all the defects of aluminium problems still exist, the cable terminal used to connect to aluminum alloy, aluminum alloy cable advantages and value, it is better to use aluminium cable directly, because of the aluminium cable is more economic. Using aluminum alloy special terminal can give full play to the advantages of aluminum alloy cable and value. The second reason: the copper aluminum transition terminals for the original is used to connect cable, terminal and terminal equipment installation size size does not match, not only increase the switching cost such as bronze, transfer the bronze multi-channel switch, will also leave connection security hidden danger. Using aluminum alloy special terminal can avoid similar problems. Third reason: because of the copper aluminum transitional connection terminals and electrical terminal does not match, increase through the bronze and the contradiction that often produce cost, that is difficult to avoid for this kind of problem cannot be solved the connection safety hidden danger of brutal construction. Using aluminum alloy special terminal can avoid similar problems. Fourth reason: copper aluminum transition terminals for the original is used to connect the cable, the terminal inside diameter does not match with the cable conductor diameter, must use special pressure tool, cause difficult to standardize the construction, connection security hidden danger. Using aluminum alloy special terminal can avoid similar problems. Fifth reason: the use of various brands on the market at present the purity of copper aluminum transition terminal chinalco only at most. % ( Note: general electrical aluminium in purity. % above) 。 And manufacturing copper aluminum transition terminals in, or with poor conductivity of the solid fusion and quenching treatment of industrial aluminum, so the comprehensive electrical conductivity of copper aluminum transition terminals can only under % IACS ( Note: aluminum alloy conductor conductivity over % IACS) , causing terminal with aluminum alloy cable electrical properties do not match, the result is a transmission line resistivity increase % above, line transmission capacity decline or increase the line loss more than % %. Using aluminum alloy special terminal can give full play to the ability to use aluminum alloy cable for electric power transmission. As for does not agree with AA aluminium alloy conductor performance of other aluminum terminal, because of its physical, mechanical, electrical materials, such as the compressive creep performance and AA aluminium alloy conductor performance differences, if such a terminal used in aluminum alloy cable connection, the safe hidden trouble that will lead to problems such as is self-evident. So users and related personnel must clear understanding of the fact is: to ensure that the advantage and value of aluminum alloy cable and reflect, safety, no hidden dangers is the precondition of application of aluminum alloy cable: conform to the requirements of the standard performance of aluminum alloy cable with cable connectors used jointly form a complete set of aluminum alloy.