The design of the overall structural strength of the bus duct not only needs to withstand the effects of electric force and thermal stress under fault conditions without deformation, ensure sufficient electrical clearance and creepage distance with live conductors, but also needs to ensure a safe working environment under normal and heavy mechanical load conditions.
Normal mechanical load - considering the weight of the busbar main unit itself and the weight of the feeding and tapping units; Heavy mechanical load - adding one person's weight (90kg) on top of the normal mechanical load - special mechanical load - agreed upon by the user and manufacturer to increase the load. In addition to the above requirements, the new standard also adds heat resistance requirements for possible stress situations such as handling and storage. That is, if it is specified that the busbar is used for normal mechanical loads, a quality assessment of at least 4 times the length of the unit is required; If it is specified that the busbar is used for heavy mechanical loads, a minimum of 4 times the length of the unit plus 90 kg of weight must be assessed. After trial and verification, the bus duct should meet the following safety indicators: the original protection level should be maintained (the shell should not have cracks or surface deformations); During and after the trial, the functionality of the protection circuit should be maintained; The electrical clearance and creepage distance meet the requirements; Does not cause deformation when inserting in and out of the unit.
Characteristics of bus duct structure:
1) Strong heat dissipation capability
The dense bus duct is tightly adhered to both the phase and the outer shell, thus capable of withstanding significant electrical and thermal stresses. And it can quickly dissipate the heat generated by the conductive discharge, with a high current carrying capacity. The joint is fastened with insulated bolts and connected with double copper bars, effectively increasing the contact area of the joint and greatly reducing the temperature rise at the joint location.
2) New generation environmentally friendly products
The dense busbar trunking is wrapped with flame-retardant cross-linked polyethylene heat shrink tubing, which has strong insulation performance and does not emit toxic gases when exposed to fire.
3) Flexible wiring
The dense bus duct socket interface is flexible and convenient to set up, with a large number of sockets and strong universality. When adjusting the position of electrical equipment, there is no need to change the power supply system.
Yunnan Youtong Electric Co., Ltd. is a professional manufacturer of bus ducts and cable trays, with high cost-effectiveness. Crafted with ingenuity, it is durable, with complete specifications and low prices. If you need it, please feel free to call us for consultation!
