When designing the size of the busbar in the switchgear, the following key factors need to be considered:
1. Current load: The cross-sectional area of the copper bar needs to be selected based on the current it carries. Generally speaking, the greater the current, the greater the cross-sectional area of the copper bus required.
2. Temperature rise: The copper bar will generate a certain amount of heat when transmitting current, so the temperature rise of the copper bar needs to be considered. Excessive current density will cause the copper bar to overheat and affect the normal operation of the equipment.
3. Contact resistance: The size design of the copper bar also needs to consider the contact resistance to ensure good contact during current transmission and reduce resistance loss.
4. National standards and specifications: According to national standards or relevant specifications, understand the specific requirements and limitations of copper bar size design to ensure that the design meets the standard requirements.
Generally speaking, designers will design the busbar size based on the specific electrical load conditions and equipment requirements, combined with the above factors. If you have special requirements or need more detailed design guidance, it is recommended to consult electrical design professionals or consult relevant electrical design manuals and forums to ensure that the designed copper busbars meet safety and reliability requirements.
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