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What are the factors related to the temperature rise of the busway?

  • Categories:Zhongrui News
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  • Time of issue:2019-05-28 15:26
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(Summary description)1. The copper content of the copper row is low, and the resistivity is large. People often mention the copper content and resistivity of the copper row, which are indeed related to the current carrying capacity of the busway. A copper row with a copper content of 99.95% or ≥99.93% and a resistivity of ρ ≤ 0.01777 (ohm·square mm/m) is a relatively good copper row in the busbar copper row. If the copper content is low, the resistivity is large, and the conductor specification can only be increased to ensure the current carrying capacity and temperature rise value. Otherwise, the temperature rise will be too high. 2. The heat dissipation of the insulating material and the outer shell structure is better. The structure of the busbar is better. The conductor of the busbar with better heat dissipation of the insulating material can meet the current-carrying requirements after being discounted according to the design manual or the electrician manual. However, some products of insulating materials are

What are the factors related to the temperature rise of the busway?

(Summary description)1. The copper content of the copper row is low, and the resistivity is large. People often mention the copper content and resistivity of the copper row, which are indeed related to the current carrying capacity of the busway. A copper row with a copper content of 99.95% or ≥99.93% and a resistivity of ρ ≤ 0.01777 (ohm·square mm/m) is a relatively good copper row in the busbar copper row. If the copper content is low, the resistivity is large, and the conductor specification can only be increased to ensure the current carrying capacity and temperature rise value. Otherwise, the temperature rise will be too high. 2. The heat dissipation of the insulating material and the outer shell structure is better. The structure of the busbar is better. The conductor of the busbar with better heat dissipation of the insulating material can meet the current-carrying requirements after being discounted according to the design manual or the electrician manual. However, some products of insulating materials are

  • Categories:Zhongrui News
  • Author:
  • Origin:
  • Time of issue:2019-05-28 15:26
  • Views:
Information

1. The copper content of the copper row is low, and the resistivity is large. People often mention the copper content and resistivity of the copper row, which are indeed related to the current carrying capacity of the busway. A copper row with a copper content of 99.95% or ≥99.93% and a resistivity of ρ ≤ 0.01777 (ohm·square mm/m) is a relatively good copper row in the busbar copper row. If the copper content is low, the resistivity is large, and the conductor specification can only be increased to ensure the current carrying capacity and temperature rise value. Otherwise, the temperature rise will be too high. 2. The heat dissipation of the insulating material and the outer shell structure is better. The structure of the busbar is better. The conductor of the busbar with better heat dissipation of the insulating material can meet the current-carrying requirements after being discounted according to the design manual or the electrician manual. However, some products of insulating materials are resin casting, or other insulating materials with poor heat dissipation, air-type busbar structure, and dense busbar structure with poor heat dissipation have more discounts. Some product structures and insulation materials have poor heat dissipation. The conductors are selected according to the 30 °C ambient temperature in the electrician's manual, which misleads the users. It is understood that some of these products can only reach 60%~70% of the interception capacity, which causes serious power supply to China. The safety hazards and huge power loss are worthy of attention. 3. Some projects with overload operation, with the increase of equipment, the load increases, or the original design of the busbar can not meet the needs of the site. Some projects use variable volume to change the capacity when ordering, and no effective protection measures are taken. The operating temperature rises, and the switch at the beginning after the variable capacity cannot ensure the overload of the small current after the variable capacity, so there is a safety hazard. 4. The connection of the connector is unstable, and the resistivity of the connector is increased. The connection of the connector is unstable, the contact of the connector is poor, and the resistivity is increased, which can cause the temperature rise of the busbar to rise. 5, temperature rise and skin effect is not unrelated. Inside the conductor, the heat generated by the resistor is not easy to dissipate, the temperature is high, the rate of price and electron operation is high, and the line is not very flat, which leads to a relatively narrow electronic path. The resistance is high. On the surface of the conductor, the heat dissipation is fast, the temperature is low, the rate of price and electron operation is low, and the line is flat. This leads to a relatively large electronic path, and thus the surface resistance of the conductor is small and the electrons run faster, which is also the cause of current skin collection. one.

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