Installation of gas cabinet busbar and circuit breaker
发布日期:2024-10-15Medium and low inflatable cabinetHorizontal busbar installation:
1. Check that the number, size and surface area of the busbars meet the design requirements;
2. Handle with care to avoid damaging the copper busbar;
3. Qinghao needs to install the busbar;
4. Installation requirements for busbars in gas chambers:
4.1. All busbars should be flat, smooth and free of burrs. Except for the horizontal busbars, the corners of other busbars should be rounded;
4.2. The contact surface of the copper busbar should be evenly coated with conductive paste to fill the micro-pits. The conductive paste coating process and safety precautions are shown in the "Conductive Paste Coating Process Code";
4.3. Install the horizontal busbar first. When the busbar is placed vertically, the through bolts should be inserted from front to back; when the busbar is placed horizontally, the through bolts should be inserted from bottom to top. In other cases, the nuts should be placed on the maintenance side. The bolt length should be 2-3 buckles exposed from the nut. Special circumstances should be based on the principle of not affecting the use of components;
4.4. Both sides of the busbar connected by through bolts should be equipped with enlarged series flat washers (standard flat washers can be used when there is not enough space for some busbars). There should be a clear distance of more than 3mm between adjacent bolt washers, and spring washers or locking nuts should be installed on the nut side.
4.5. All nut ends should be equipped with screw shielding covers;
4.6. The contact surface of the busbar should be tightly connected. First, tighten the bolts with pneumatic tools (other wrenches can be used to tighten the places that the pneumatic tools cannot reach), and then use a torque wrench to check its tightness. The tightening torque value should comply with the requirements of Table 2.
4.7. All contact surfaces at the busbar overlap should fit naturally and have good contact. The connection between busbars should maintain sufficient and lasting contact pressure, but it should not cause permanent deformation of the busbar. It is absolutely not allowed to forcibly flatten the busbar with bolts when the contact surface at the overlap does not fit naturally, so that the busbar is under stress for a long time.
Medium and low inflatable cabinetInstallation of connecting busbar:
Installation of connecting busbar:
2. When the internal assembly of the inflatable box is not completed and the operation needs to be suspended, the box should be temporarily sealed, and the unassembled parts should be wrapped with clean and dry plastic cloth and placed in a safe area;Medium and low inflatable cabinetInstallation of circuit breaker:
1. The same-phase contacts are required to be coaxial and the axes of the three-phase contacts are required to be on the same horizontal plane. Check whether they meet the requirements;
2. Check that when the three-position switch is in the isolation position, the three-phase conductive copper nuts should be in the same position, and the rear end surfaces of the nuts and the middle contact should be flush;
3. Inspection and treatment of sealing groove surface shall refer to relevant regulations;
4. The sealing plate should be tightened at the four corners first, then the middle, and then up and down, left and right, alternately, cyclically, and evenly.