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Metro third current contact rail is a kind of steel aluminum composite conductor rail is a new type of conductor rail superior to old low carbon steel conductor rail. Now is widely used as conductor rail. It is made of low carbon alloy steel and aluminum alloy. The aluminum alloy is the main body of the conductor rail. When selecting the steel material, its wear resistance, corrosion resistance and conductivity are mainly considered. Chromium steel is generally selected, and its wear resistance, conductivity and thermal conductivity can basically meet the requirements of steel aluminum composite conductor rail.

It is mainly used for urban rail transit and electrified railway transmission system. Compared with the existing low carbon steel conductor rail, it has a series of advantages, such as low resistance, ہلکا وزن, سنکنرن مزاحمت, little wear, وغیرہ. It can save about 60% of the energy loss and the service life will be more than 50 سال.

Drawing of J form cover:

Drawing of Al conductive rail:

Material of Aluminum rail:

Technical specification:

Commercial description:

Metro third current contact rail for metro also known as the third rail or contact rail, is a critical component of the electric power supply system for many metro trains. This rail serves as a conduit for transferring electrical current from the power supply to the train’s electric motors.

The third rail is typically installed along the side or center of the track and is made of a highly conductive material, such as aluminum or steel. It is usually covered with a protective coating or shield to prevent corrosion and ensure reliable electrical contact with the train’s current collector shoes.

When the train moves over the third rail, the collector shoes make contact with the rail, completing an electrical circuit and drawing power from the rail to drive the train’s motors. The third rail is maintained at a constant voltage potential, typically ranging from 600 کو 750 volts direct current (DC), depending on the specific metro system.

Metro third current contact rail must be properly maintained and kept free of any debris or obstructions that could interfere with the flow of electricity or cause safety hazards. مزید برآں, safety measures such as insulation, warning signs, and fencing are typically in place to protect people from coming into contact with the high-voltage rail.

Photos of manufacturer:

The steel and aluminum composite materials of the steel aluminum composite conductor rail are the solid metallurgy combination of the cleaned steel strip and aluminum profile in the mixing mold according to the conventional process parameters. This metallurgical combination is formed through the role of heat and pressure in the kneading process, and with a special conductive layer. In this process, the metal compound Al3Fe2 is formed between aluminum and iron atoms, and the metallurgical bonding between the two materials will reduce the interlayer resistance. Since there is no gap between the contact surface of steel and aluminum, the contact surface is not easy to be corroded and damaged, which can ensure the stability of low resistance for a long time. اضافی طور پہ, the peel test has proved that it is impossible to peel the steel strip from the aluminum body. Only special things can separate steel from aluminum. The metallurgical combination between steel and aluminum can withstand great external forces without deformation.

اضافی طور پہ, problems such as discoloration, scratches and scratches on the steel surface are allowed to occur during processing without affecting the practicability of the product.

The steel aluminum composite conductor rail is made of low-carbon alloy steel and aluminum alloy. Aluminum alloy is the main body of conductor rail. When selecting materials, its excellent conductive function must be considered and meet the requirements of mechanical function. First of all, the wear resistance, corrosion resistance and conductivity of steel should be considered. Chromium steel is usually selected, and its wear resistance, conductivity and thermal conductivity can basically meet the requirements of steel aluminum composite conductor rail.

Steel aluminum composite conductor rail has been proved to be a useful and reliable product in long-term application. Compared with low-carbon rail, it has the following advantages:
(1) The conductivity of aluminum alloy is 28-33ms/m, 3-4 times that of non alloy low carbon steel (8.5ms/M). The conductivity of steel aluminum composite conductor is higher than that of low carbon steel conductor. In this new equipment form, the voltage reduction reduces the traction energy consumption proportionally, which increases the power supply distance and reduces the number of substations.
(2) The specific gravity is small, and the equipment is easy to construct: the weight of the steel aluminum composite conductor is less than half of the weight of the low carbon steel conductor with the same cross section. The equipment is simple, the cost is low, and the cost is reasonable, and there is no need for lifting equipment.
(3) Good corrosion resistance and wear resistance: To ensure the excellent corrosion resistance and wear resistance of the steel strip, the steel aluminum composite conductor rail is made of chromium stainless steel with excellent intergranular corrosion resistance. The conductor rail has excellent corrosion resistance when the equipment is operated and tested in the laboratory under marine climate conditions. ایک ہی وقت میں, the stainless steel contact surface is smooth and wear-resistant, which can extend the service life of the conductor rail and the collector.
(4) Good resistance: The kneaded composite of aluminum and stainless steel can form a variety of profiles.
(5) Good economic benefits: under the same transportation volume, the cost of steel aluminum composite conductor rail is lower than that of low carbon rail. This is due to: 1) the voltage decreases and the substation demand decreases; 2) The steel aluminum composite conductor rail is light in weight, reducing the equipment cost; 3) The annual digestion cost is low.