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Machining and connector of busway

  • Categories:Zhongrui News
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  • Time of issue:2019-05-29 17:30
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(Summary description)母线槽机械加工要求精度高、互换性强、装拆方便,在安装时要求能轻快地插人。母线槽的连接头是关键。要求连接头机械加工精度高、互换性好,必须满足三个要求:①接触电阻小;②能自动消除热应力的损坏;③装拆方便。其基本结构为:若单面接触时接触面非常光滑,不压麻点,采用单螺钉连接大容量母线槽采用并联双螺钉或并联3螺钉,两端均有蝶形垫圈锁紧,固紧力矩均有规定,并应保持接触压力不变,以自动消除热应力。  母线槽应以

Machining and connector of busway

(Summary description)母线槽机械加工要求精度高、互换性强、装拆方便,在安装时要求能轻快地插人。母线槽的连接头是关键。要求连接头机械加工精度高、互换性好,必须满足三个要求:①接触电阻小;②能自动消除热应力的损坏;③装拆方便。其基本结构为:若单面接触时接触面非常光滑,不压麻点,采用单螺钉连接大容量母线槽采用并联双螺钉或并联3螺钉,两端均有蝶形垫圈锁紧,固紧力矩均有规定,并应保持接触压力不变,以自动消除热应力。  母线槽应以

  • Categories:Zhongrui News
  • Author:
  • Origin:
  • Time of issue:2019-05-29 17:30
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Information
Busbar groove machining requires high precision, strong interchangeability, convenient assembly and disassembly, and requires quick insertion during installation. The connector of the busway is the key. It is required that the joint has high machining precision and good interchangeability, and must meet three requirements: 1) the contact resistance is small; 2 can automatically eliminate the damage of thermal stress; 3 is convenient for assembly and disassembly. The basic structure is as follows: if the contact surface is very smooth when single-sided contact, no pressing point, single-screw connection large-capacity busway adopts parallel double screw or parallel 3 screw, both ends have butterfly washer locking, tightening torque Both are specified and the contact pressure should be kept constant to automatically eliminate thermal stress.
 
The busway should be selected based on the temperature rise to achieve safe operation, sufficient service life and reliable cross-sectional area of ​​the conductor. It is not the only criterion for judging the busway. The busway seems to have sufficient cross section, but there may be The danger of high temperature rise. It is specified that 55 ° C is the maximum allowable temperature rise. Of course, using a larger cross section can reduce some voltage drop and temperature rise.
 
A prominent limiting factor in the well-designed busbar working life is the gradual thermal aging of its insulation. For every 10 °C increase in operating temperature, the life of the insulating material is reduced by approximately half. The busbars in the busway may be subjected to considerable electromagnetic force when the short-circuit current occurs. The force generated by the busbar per unit length is proportional to the flat force of the short-circuit current and inversely proportional to the distance between the busbars.

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