The enclosure of the enclosed bus duct is made of non-magnetic aluminum alloy plate,with low maintenance workload.It is fully enclosed and windless,with corrosion resistance and good heat dissipation and grounding properties.Its non-magnetic aluminum material can greatly reduce the eddy current heating phenomenon caused by high voltage current.The special flange design of the enclosed bus duct allows for flexible splicing of larger bus boxes without the need for bends,thereby achieving programmatic and standardized design and installation of the bus system.

　　Each section of the enclosed busbar duct is generally equipped with standard maintenance holes at the upper part,which allow maintenance personnel to access any position inside the busbar duct.The maintenance port adopts a special flanging production process and high requirement flange welding technology,which enables the protection level of the busbar shell to reach IP54.It can be installed in a typical outdoor environment without adjusting the protection level.The precision manufacturing process and reasonable structure ensure that the surface of the busbar is smooth and even after production,meeting the requirement of no water accumulation in outdoor enclosures.Appropriate drainage at the bottom of the busbar can drain the accumulated water inside the busbar,while also blocking the entry of dust and foreign objects.Reasonable internal support design ensures a large electrical gap between each phase busbar to meet customer requirements.The grounding terminal design at the flange end of each busbar ensures a smooth overall grounding system after installation of the busbar system.The surface of the shell is sprayed with matte paint,and the color can be selected according to customer requirements.

　　Enclosed bus duct reduces grounding faults and avoids phase to phase short circuits.The short-circuit current at the outlet of a large capacity generator is very high,which brings great difficulties to the manufacturing of circuit breakers,and the generator cannot withstand the impact of outlet short-circuit.The enclosed busbar is protected by an outer shell,which can effectively eliminate external moisture.Ground faults caused by dust and foreign objects improve the continuity of generator operation.The busbar needs to be phase separated and sealed to basically avoid the occurrence of phase to phase short circuits.Eliminate steel structure heating.The exposed high current busbar causes eddy currents and circulating currents in the surrounding steel structures and steel bars under electromagnetic induction,resulting in high heating temperatures and significant losses,which reduces the strength of the structure.The use of shell shielding for enclosed busbars can fundamentally solve the problem of steel structure induced heating.

　　The enclosed bus duct reduces the short-circuit electric force between phases.When a large short-circuit current flows through the bus due to a short circuit,the shielding effect of the shell greatly reduces the short-circuit electric force on the phase conductors.After the busbar duct is sealed,it is possible to adopt a micro positive pressure operation mode to prevent insulator condensation,improve operational reliability,and create conditions for the busbar to adopt ventilation and cooling methods.The enclosed busbar is produced in a complete set by the factory,with guaranteed quality,low operation and maintenance workload,easy construction and installation,and no need to set up mesh barriers,simplifying the structure and requirements for civil engineering structures.