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• Time of issue:2022-01-10
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(Summary description)The high-voltage waterproof bus duct adopts a high-strength and high-performance DMC insulation support block clamping structure, which has good load performance and dynamic thermal stability; Strong overload capacity and low temperature rise. The high-voltage waterproof busbar duct adopts enclosed packaging, which can greatly reduce the characteristics and installation method of the high-voltage waterproof busbar duct. When delivering large currents, the frequency of electrical maintenance can be eliminated.

The installation of high-voltage waterproof bus duct is convenient, and it can achieve adjustment of horizontal and vertical degrees of freedom. It can not only meet the expansion and contraction requirements caused by different temperature drops, thermal expansion, and cold contraction, but also compensate for errors caused by foundation settlement. The traditional skateboard expansion device has low protection level, difficult installation, and unreliable operation.
The purpose of the high-voltage aluminum tube waterproof bus duct is to connect the electrical connection between transformers and high-voltage distribution boards, the power supply system of large industrial mines and substations, and the electrical connection between generators and compressors. Large enterprises own power plant transformers. Generally speaking, a waterproof busbar duct system with a working voltage above 3000V is called a high-voltage waterproof busbar duct. The insulation resistance between phases of the high-voltage waterproof bus duct is greater than 1000m Ω. The protection level is high, and the outdoor protection level is generally IP54. The high-voltage waterproof busbar duct should be connected to the power plant and large transformers.
Maintenance methods for dense waterproof busbar ducts:
During the long-term operation of the waterproof busbar duct, it should be inspected and maintained regularly at least once a year. Check that the total load current should not exceed the design current and rated current of the main busbar.
Before maintenance of the waterproof busbar duct, check if the waterproof busbar duct system is powered off! Completely cut off all power to the bus duct! Use a multimeter to measure whether the wires have voltage and confirm that the busbar system is not live before daily maintenance. Prevent serious accidents where high voltage can cause injury or even death to operators! During the operation of the waterproof bus duct, check the entire system for leaks, water spray, and potential sources of moisture, as well as any heavy objects that threaten the system and heat sources that affect the temperature rise of the bus duct system. Check for foreign objects entering the waterproof busbar duct. Inspect the components of the waterproof busbar duct system for defects and corrosion, and check if the supporting springs have appropriate elasticity. If any problems are found, please replace them immediately.
When the bus is running for a long time, the temperature rise of the joints is checked regularly every year. The temperature rise of the joint is qualified according to GB7251 standard, and does not exceed 70 ℃ (ambient temperature 40 ℃). Check if the connecting bolts and wire contacts of all bus connectors are loose.
Prevent the connector from heating up due to increased resistance caused by looseness. Check whether the insulation material is aged and whether the conductive part is melted or deformed. If there is interphase grounding or insulation breakdown, it should be disassembled in sections, inspected in sections using a withstand voltage testing machine to identify faults, or replaced with waterproof bus ducts or re treated with insulation coatings.
Check if the pins of the junction box of the waterproof busbar duct system have good contact with the busbar. Regularly remove dust from the surface of the bus duct system to ensure good heat dissipation. After the maintenance of the bus duct system, the insulation resistance should be checked and maintenance records should be made before re energizing.