Product Description
This product is designed and manufactured according to GB/T 31840.2-2015 "Rated voltage 1kV to 35kV aluminum alloy core extruded insulation power cable Part 2: Rated voltage 6kV to 30kV cable" and GB/T 31840.2-2015 "Rated voltage 1kV to 35kV aluminum alloy core extruded insulation power cable Part 3: Rated voltage 35kV cable"
This product is suitable for 6kV-35kV power transmission and distribution system to transmit electric energy. It has the characteristics of light weight and moisture resistance, and can be laid in indoor and outdoor direct burial, bridge, pipe, bracket, cable trench and other environments.
a) Power frequency rated voltage U0/U 6/6kV-26/35kV.
b) The maximum long-term temperature allowed for the cable conductor does not exceed 90℃.
c) When short-circuited (maximum time not exceeding 5S), the maximum temperature of the cable conductor shall not exceed 250℃.
*Laying on the ground
d) The ambient temperature during cable laying shall not be lower than 0℃.
e) The cable bending radius is:
Single-core cable: 20D
Three-core cable: 15D
(1) Electrical performance
The conductivity of HONKAI aluminum alloy conductor is between that of aluminum and copper. Under the same current carrying capacity, the weight of aluminum alloy conductor of the same length is only half of that of copper conductor. When the cross-sectional area of aluminum alloy conductor is 1.5 times that of copper, its electrical performance is the same, that is, it achieves the same current carrying capacity, resistance and voltage loss as copper.
(2) Creep resistance
HONKAI aluminum alloy conductor is added with a variety of metal elements such as iron, copper, zinc, magnesium, rare earth, etc., and with a unique heat treatment process, it greatly reduces the "creep" tendency of metal under heat and pressure. The connection performance is greatly improved, especially when the alloy elements added during conductor annealing produce high creep resistance, which can ensure the stability of the connection even under long-term overload and overheating.
(3) Connection performance
The connection performance of HONKAI aluminum alloy cable and hardware has passed the GB/T9327 1000 thermal cycle test, proving the long-term stability and reliability of HONKAI aluminum alloy cable connection, which is the only basis for judging the connection quality.
(4) Corrosion resistance
Aluminum quickly forms a dense oxide film with a thickness of about 2x 10-4mm in the air to prevent further corrosion of the internal metal. The addition of rare earth elements such as cerium and lanthanum to HONKAI aluminum alloy conductors further improves the corrosion resistance of metal materials with aluminum as the conductor alone. In a sulfur-containing environment, the corrosion resistance of aluminum alloy is much better than that of copper.
(5) Mechanical properties
High elongation: The elongation of HONKAI aluminum alloy conductors can reach more than 30%, which is an important indicator of the quality of the product and the ability to withstand external forces.
Strong toughness: HONKAI aluminum alloy is 25% more flexible than copper. Even if it is repeatedly stressed, it will not crack, reducing the safety hazards during installation.
Easy to bend: The minimum bending radius of HONKAI aluminum alloy cable is 7 times the outer diameter of the cable, which reduces the installation layout space, makes it easier to lay, and saves installation costs.
Low rebound: The rebound angle of HONKAI aluminum alloy cable is 40% smaller than that of copper cable, which is more conducive to the tightness of the terminal connection joint, and is easy to press to improve the stability of the connection.
