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Safety busbar, also known as: busbar, safety slide wire, slide wire. Safety busbar is an energy-saving busbar developed by learning from advanced foreign experience and combining with national conditions. It has safety, reliability, and excellent mechanical and electrical properties, and is easy to install and maintain. The phase spacing is 80mm, the protective shell is made of two materials: engineering plastic and aluminum-plastic alloy, and the conductor is aluminum alloy (with embedded stainless steel strip) or pure copper. It is not affected by rain, snow, frost, and is suitable for harsh environments such as open air, water mist, acid mist, and conductive dust. Specifications below 300A can be made into circles and arcs of various radii according to user needs.
Safety busbar is used to supply power to moving equipment. It consists of two parts: the slide rail (fixed part, connected to the power supply, usually made of 4m/root or 6m/root connected together) and the current collector (sliding part, which can slide on or inside the slide rail and contact the copper strip to collect electricity, used to connect with the moving motor).
Safety busbar (tubular, enclosed), single-pole combined busbar, rigid busbar, multi-pole tubular safety busbar, seamless safety busbar, cable safety busbar, I-beam cable trolley, etc. are commonly used. They have greatly improved in protection level and insulation, and are safe and reliable.
The quality of safety busbar can be measured by the following standards:
1. Carbon brush service life -- it is a consumable item, and the travel distance affects the equipment maintenance cycle.
2. Busbar shell quality -- applicable temperature, environment, etc.
3. Current collector performance -- mainly from the wheel service life, turning wheel design, and whether the current collector can be used in various environments.
4. Busbar expansion problem -- expansion must be considered when the length exceeds 100 meters.
5. Voltage drop problem -- the voltage drop varies according to the length of various copper strips.
1. Product structure: The M-type busbar consists of guide rail, protective cover, current collector, hanger, connector, fixing clamp, end cap, etc. According to user requirements, expansion section (thermal compensation device), maintenance section (isolator), etc. can also be configured.
2. Guide rail and protective cover: The guide rail is made of aluminum alloy profile with good conductivity and strong environmental adaptability (grade 6063, state T5). A "V"-shaped stainless steel groove is embedded in the lower part of the guide rail to ensure wear resistance, stability, and good contact when the current collector brush slides along the groove. The guide rail is generally fixed at 6 meters. The protective cover is made of engineering plastic with toughness, wear resistance, anti-aging, and flame retardant properties, providing good insulation protection for the guide rail and ensuring personal safety.
3. Current collector: The current collector is a support-type structure and is the main component for supplying power to moving equipment. It consists of special carbon brushes, terminals or lugs, plastic protective cover, support arm, etc. It applies appropriate contact pressure, slides smoothly along the guide rail, and supplies power to the equipment. When the equipment needs maintenance, the carbon brush of the current collector can be pulled away from the guide rail to cut off the power, ensuring safety and facilitating operation.
4. Connector (also power supply): The connector is specially used for end connection between guide rails. It is reliably connected by pressure plates and bolts, and the shell is made of engineering plastic as a protective cover. The protective sleeve that also serves as a power supply can introduce the power incoming line at the port and is fastened together with the connector pressure plate and bolts.
5. Hanger, fixer, and end cap: The hanger is a special part for hoisting and fixing the busbar guide rail. The fixer is a device that limits the guide rail at the bracket. When the guide rail expands and contracts due to temperature changes, it guides it to extend to both sides of the fixer. The end cap is installed at both ends of the guide rail for insulation protection. The hanger and end cap are both made of engineering plastic.
6. Expansion section (thermal compensation device): The expansion section is also called expansion joint, thermal compensation device, etc. It consists of connector pressure plate, compensation power supply aluminum plate or copper plate, lead wires, etc., and the shell is made of engineering plastic. When the guide rail expands and contracts due to temperature changes, the expansion joint adjusts its gap to avoid deformation of the guide rail. Generally, when the workshop length exceeds 200 meters, one group is configured for every additional 100 meters.
7. Maintenance section (isolator): The maintenance section is made of connector pressure plate and high-strength insulating material, with an engineering plastic shell as the protective cover. It is selected according to user needs and is mainly used for convenient maintenance of busbar, moving equipment, etc.
Safety busbar: For dusty, humid environments, dust-proof sealing strips and hand protection can be equipped (hand protection should be equipped when the busbar is very close to people). The running speed of the current collector is less than 300 meters/minute.
Single-pole combined safety busbar: Easy to install, fast speed, up to 500 meters/minute (imported busbar can achieve this).
Rigid safety busbar: Used for high-current equipment, current can reach several thousand amperes.
Tubular busbar: Combined according to different pole numbers, current can also reach kiloamperes.
First is single-pole safetybusbar, second is multi-pole safetybusbar, third is single-pole rigidbusbar. They are collectively called safety busbar. Of course, there are also some special models of busbar, such as seamless busbar, etc.
Single-pole safety busbar is suitable for most power supply systems of moving equipment. Its simple material, easy installation, easy maintenance and repair, and low price make it one of the first choices for many customers among safety busbar specifications. Single-pole busbar is suitable for moving equipment with current between 150A and 2500A.
Multi-pole safety busbar is made of copper bar. Its conductivity and energy saving are greatly improved compared with single-pole safety busbar, but its cost is also much higher. Moreover, due to different structures, its current carrying capacity is far lower than that of single-pole busbar. It is generally used on small-power moving equipment, with a working current between 50A and 300A.
Rigid busbar is mainly used in some special occasions, such as high temperature, high corrosion, and high humidity environments. It is suitable for operation in all occasions, but because of its high cost, it is mostly selected only in these special occasions.
Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.
