At the beginning of 2008, South China suffered severe ice disaster not in 50 years, causing great damage to the power supply system, in order to solve the problem of power transmission line icing, electric power design institute in the power supply system increases the high current DC ice melting device, electrical equipment requirements matched must have closure greater ability and higher heat resistance, in order to meet the demand of the market, the company developed high strength heat-resistant aluminum alloy high current DC ice melting device of tubular busbar and supporting the connection fitting, by users, product performance and fully meet the design requirements and the use of electric power, electric power departments of praise
Copper busbar is the dominant product in Chi Mei Guangzhou power equipment limited company, is the key equipment in the power transmission system (material), safety, and reliable operation of the power system and power equipment plays a vital role in.
A copper busbar. Uses: mainly used in our country in the electric power construction project of power transmission line and substation transformer connection between conductors, transmission line jumper, in power equipment connecting conductor and high current DC ice melting device as over current conductor, is a new conductor, instead of rectangular trough, bar shaped bus the traditional wire and soft, is the key equipment in the power transmission system (material), safety, and reliable operation of the power system and power equipment plays a vital role in.
The performance of two, copper busbar: this series of products with material properties, unique structure and processing technology, the utility model patent has 3 utility model patents, has authorized 3 application has passed the first instance of the invention patent, 1 applications have been accepted, is a kind of new energy bus conductive material, is traditional ACSR, groove, rectangular aluminum bus alternative products.
The main performance is reflected in the:
1) tubular conductor (busbar) using the domestic advanced hot top casting of advanced technology, seamless pipe, such as a series of smooth surface, high precision, high tensile strength, not easy to generate discharge and deformation;
2) products using rare-earth, heat-resistant aluminum alloy material company developed (has been declared national invention patents), has excellent machining, welding, conductive and heat resistance. Products by the science and technology department organization identification, reached the international advanced level (bureau of science and technology of Huanggang City Yellow Kejian word (2009) No. first);
3) convection cooling conditions, low temperature rise, low loss, strong conductive ability, large carrying capacity (test reports the Wuhan Institute of "2008 high" cable No. S13);
4) high heat resistance, can increase the tube bus operating temperature (the temperature reached 150 ℃ -200 ℃), the mechanical strength of the conductor with high under high temperature, to improve the safety and reliability of power system (Wuhan University of Technology materials research and testing center "test report" No. 2008343);
5) the installation covers an area of small, composite tubular busbar is flexible conductor covers an area of 1/3;
6) corrosion resistance, not easy to ice, anti disaster ability, long service life (the first application in the ice melting device, has been declared national patent);
7) has the advantages of convenient installation, beautiful appearance, safe, stable, reliable, convenient repair and maintenance. Copper busbar
Three, the appearance of copper busbar
The product is a hollow tubular structure, surface gloss, beautiful appearance, uniform size. Outside diameter size from φ 60mm to φ 300mm; wall thickness from 3mm to 12mm, a single length up to 15 meters. Real map as follow
Four, the copper tube bus technology:
1) pipe is smooth, and the vertical axis and.
2) tube bus length deviation is positive error: +15 ~ +25mm
3) tube bus permit does not affect the outer diameter of the straightening of spiral groove, the depth is not more than 0.5mm
4) tubular busbar bending: m/L<2.0mm
5) space liner pipe parent matching is not more than 0.5mm and can ensure the installation need.
6) bus has smooth surface, no crack, wrinkle, inclusions and deformation and distorting phenomenon.
7) pipe base material adopts 6063G series, status: T6.
8) the elastic modulus values to control the installation deflection value in a specified range.
Technical standard
GB/T 4437.1-2000 "copper hot extruded tube of first parts: the seamless pipe"
GB6983 "industrial copper pull (TIE) pipe"
Metal tensile test method "GB228"
GB/T6893-2000 "Copper drawing (rolling) seamless pipe"
GB/T4437.1-2000 "copper dimensions and tolerances (extruding seamless)"
GB/T4437.2-2001 "copper dimensions and tolerances (extrusion seam)"
GB/T3048.2-2007 "standard test method for performance of electric wire and cable, metal conductor resistance material test"
"YS/T454-2003" copper conductor
"Q/XH01-2008" copper conductor
GBJ149-90 "electric equipment installation engineering code for construction and acceptance of" bus
Packaging, marking, storage, transport: GB/T3199 - 2007 "copper product packaging, marking, storage, transport"
Thermal properties of high strength heat-resistant copper busbar is good, in the use of higher temperature (150 ℃ ~200 ℃) has high strength, heating to 250 ℃ for one hour, after natural cooling can still keep high mechanical properties, tensile strength, can still maintain a normal 80%, anti icing ability; this is why copper busbar has been well received in the power sector in the application materials.