1、 Product execution standards
This product is designed and manufactured in accordance with GB/T 31840.1-2015 "Aluminum alloy core extruded insulated power cables with rated voltage from 1kV to 35kV - Part 1: Cables with rated voltage from 1kV to 3kV".
2、 Scope of application
This product is suitable for transmitting electrical energy in 1kV and 3kV power transmission and distribution systems. It has the characteristics of light weight and moisture resistance, and can be laid in indoor and outdoor environments such as direct burial, cable trays, conduits, brackets, cable trenches, etc.
3、 Usage characteristics
a) Power frequency rated voltage U0/U 0.6/1kV.
b) The cable conductor allows a long-term temperature not exceeding 90 ℃.
c) During a short circuit (not exceeding 5 seconds), the 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 bending radius of the cable is:
Single core cable: 20D
Three core cable: 15D
4、 Product Features
(1) Electrical performance
The conductivity of Mingda aluminum alloy conductor is between aluminum and copper. Under the same current carrying capacity, the weight of an aluminum alloy conductor of the same length is only half that of a copper conductor. When the cross-sectional area of the 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 performance
Mingda aluminum alloy conductors are added with various metal elements such as iron, copper, zinc, magnesium, rare earths, etc., coupled with a unique heat treatment process, greatly reducing the "creep" tendency of the metal under heat and pressure. Greatly improved its connection performance, especially when the alloy elements added during conductor annealing produce high creep resistance, ensuring the stability of the connection even under long-term overload and overheating.
(3) Connection performance
The connection performance between Mingda aluminum alloy cable and fittings has passed the GB/T9327 1000 thermal cycle test, proving the long-term stability and reliability of Mingda aluminum alloy cable connection, which is the basis for evaluating the connection quality.
(4) Corrosion resistance performance
Aluminum quickly forms a dense oxide film with a thickness of about 2x10-4mm in the air, preventing further corrosion of the metal inside. The addition of rare earth elements such as cerium and lanthanum in Mingda aluminum alloy conductors further improves the corrosion resistance of metal materials that solely use aluminum as a conductor. The corrosion resistance of aluminum alloy is significantly better than that of copper in sulfur-containing environments.
(5) Mechanical performance
High elongation: The elongation of Mingda aluminum alloy conductors can reach over 30%, which is an important indicator of the product's quality and ability to withstand external forces.
Strength and toughness: Mingda aluminum alloy has a 25% higher flexibility than copper, and even under repeated stress, it will not crack, reducing safety hazards during installation.
Easy to bend: The bending radius of Mingda aluminum alloy cable is 7 times the outer diameter of the cable, reducing the installation layout space, making it easier to lay and saving installation costs.
Low rebound: The rebound angle of Mingda aluminum alloy cable is 40% smaller than that of copper cable, which is more conducive to the tightness of terminal connection joints and easy to tighten to improve the stability of the connection.
